CN118671994A - Optical up-down wave device, optical up-down wave system and optical communication equipment - Google Patents

Abstract

The embodiment of the application provides an optical up-down wave device, an optical up-down wave system and optical communication equipment, which are applied to the technical field of optical communication. The optical up-down wave device comprises an adjustable beam splitter and a fixed beam splitter. The tunable beam splitter includes a first transmission waveguide structure and an electrode, wherein the electrode is coupled to the first transmission waveguide structure. The fixed beam splitter includes a second transmission waveguide structure. The adjustable beam splitter and the fixed beam splitter are coupled to form an optical signal up-wave path structure or an optical signal down-wave path structure. In the embodiment of the application, the beam splitter is used for processing the up-and-down waves of the optical signal, so that the cost of the optical up-and-down wave system is greatly reduced. Meanwhile, the beam splitting ratio of different optical communication devices is adjusted through the adjustable beam splitter, so that the insertion loss of optical signal transmission is reduced, and the transmission quality of optical signals is improved.

Description

Optical wave adding/dropping device, optical wave adding/dropping system and optical communication equipment

Technical Field

The present application relates to the field of optical communication technology, and in particular to an optical wave adding and dropping device, an optical wave adding and dropping system, and optical communication equipment.

Background Art

The optical communication network includes multiple optical communication devices, and the multiple optical communication devices are coupled to the transmission optical fiber. Service optical signals at multiple wavelengths are transmitted on the transmission optical fiber. An optical wave add/drop system is provided in the optical communication device, and the optical wave add/drop system is coupled to the transmission optical fiber. Each optical communication device splits the down-wave service optical signal from the transmission optical fiber through the optical wave add/drop system, and obtains the corresponding service information from the up-wave service optical signal. At the same time, each optical communication device can also generate service information and carry it on the up-wave service optical signal, and combine the up-wave service optical signal into the service optical signal on the transmission optical fiber through the optical wave add/drop system for transmission.

One way to implement an optical add/drop system is to form an optical switch array through wavelength selective switches. The optical switch array is used as a device for splitting optical signals of drop services from the transmission optical fiber, and/or as a device for combining optical signals of add services to the transmission optical fiber. However, the cost of setting up the wavelength selective switch is very high.

Summary of the invention

The embodiments of the present application provide an optical wave adding/dropping device, an optical wave adding/dropping system, and an optical communication device, which greatly reduce the device cost corresponding to the optical wave adding/dropping processing.

To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

In a first aspect, an embodiment of the present application provides an optical wave adding and dropping device. The optical wave adding and dropping device includes an adjustable beam splitter and a fixed beam splitter. The adjustable beam splitter includes a first end, a second end, a third end, a first transmission waveguide structure and an electrode. The fixed beam splitter includes a fourth end, a second transmission waveguide structure and at least one fifth end. The first end is coupled to the second end and the third end respectively through the first transmission waveguide structure. The electrode is coupled to the first transmission waveguide structure. The third end is coupled to the fourth end. The fourth end is coupled to at least one fifth end through the second transmission waveguide structure. The first end and the second end are used to: transmit a service optical signal. At least one fifth end is used to: split a down-wave service optical signal from the service optical signal through the third end and the fourth end; or, through the third end and the fourth end, combine an up-wave service optical signal into the service optical signal. The electrode is used to: input an adjustment signal, and the signal size of the adjustment signal is used to indicate the ratio of the first optical power between the optical power at the first end and the optical power at at least one fifth end.

In an embodiment of the present application, by setting a beam splitter, the cost of devices for upper wave processing and/or lower wave processing can be greatly reduced. However, after the beam splitter is applied, the splitting ratio of each optical communication device is fixed. It is necessary to set the splitting ratio of each optical communication device to the splitting ratio for the worst case to ensure the normal transmission of the signal. In this case, the insertion loss of signal transmission will increase, resulting in a decrease in the quality of signal transmission. At the same time, the dependence on a large number of optical power amplifiers will also increase. At this time, by setting an adjustable beam splitter, the adjustment of the upper wave and optical ratio and the lower wave splitting ratio can be achieved. After applying the adjustable beam splitter, in the network planning of the optical communication network, the setting of the splitting ratio of each optical communication device is more flexible, which reduces the signal insertion loss while also reducing the dependence on the optical power amplifier.

In a possible implementation, at least one fifth end is also coupled to an add/drop optical module. In the embodiment of the present application, the add/drop optical module can convert the inputted drop-wave service optical signal into a drop-wave service electrical signal and output it to a subsequent data processing circuit. Alternatively, the add/drop optical module inputs an up-wave service electrical signal from a data processing circuit and converts it into an up-wave service optical signal.

In a possible implementation, the up/down wave optical module is a coherent optical module. In the embodiment of the present application, when performing the down-wave processing, the down-wave service optical signal is a service optical signal corresponding to all wavelengths. At this time, by adjusting the wavelength of the local oscillator light source of the coherent optical module, it is possible to control the coherent optical module to receive one or more down-wave service optical signals of specific wavelengths. At the same time, in the up-wave processing, the up-wave service optical signal of the corresponding wavelength can also be generated by the coherent optical module and combined into the service optical signal.

In a possible implementation, the optical wave adding and dropping device further includes a sub-wave adding and dropping component. The sub-wave adding and dropping component is coupled to the first end. The sub-wave adding and dropping component is used to implement at least one of the following functions: outputting a monitoring optical signal to the first end. Alternatively, inputting a monitoring optical signal from the first end. Alternatively, outputting a diagnostic optical signal to the first end, and inputting a reflected signal of the diagnostic optical signal and a scattered signal of the diagnostic optical signal from the first end. In an embodiment of the present application, through the sub-wave adding and dropping component, wave adding and dropping processing of the monitoring optical signal and/or the diagnostic optical signal can be integrated into the optical wave adding and dropping device, so that the optical communication device has a higher degree of integration.

In a possible implementation, the sub-wavelength up/down component is also coupled to a diagnostic optical transceiver module. In the embodiment of the present application, the diagnostic optical transceiver module outputs a diagnostic optical signal to the sub-wavelength up/down component. At the same time, a scattered signal and a reflected signal corresponding to the diagnostic optical signal can also be input from the sub-wavelength up/down component, and the scattered signal and the reflected signal can be converted into corresponding electrical signals for analysis by a subsequent processing device (e.g., an optical diagnostic processing device).

In a possible implementation, the sub-wavelength up/down component is also coupled to the monitoring optical transceiver module. In an embodiment of the present application, the monitoring optical transceiver module can input the down-wavelength monitoring optical signal from the sub-wavelength up/down component, and convert the down-wavelength monitoring optical signal into a down-wavelength monitoring electrical signal, and output it to a subsequent processing device (e.g., an optical monitoring processing device). The subsequent processing device analyzes the channel quality of the transmission optical fiber based on the down-wavelength monitoring electrical signal. At the same time, the monitoring optical transceiver module can also output the up-wavelength monitoring optical signal to the up/down device. The up/down device outputs the up-wavelength monitoring optical signal to the transmission optical fiber on the output side for use by the subsequent optical communication equipment.

In a possible implementation, the optical wave adding and dropping device further includes at least one variable optical attenuator. At least one variable optical attenuator is coupled to at least one fifth end. Exemplarily, the variable attenuator on the corresponding fifth wave adding end can be controlled to attenuate to a closed state by an attenuation control signal. In the embodiment of the present application, by controlling the attenuation degree of the variable attenuator, the transmission of the wave adding service optical signal and/or the wave dropping service optical signal with a certain degree of attenuation can be achieved. It is also possible to control the corresponding wave adding service optical signal and/or the wave dropping service optical signal not to be transmitted.

In a possible implementation, the optical wave adding and dropping device further includes at least one optical switch. The at least one optical switch is coupled to the at least one fifth end. In the embodiment of the present application, the optical switch can be controlled to be turned on or off to control the corresponding wave adding service optical signal and/or wave dropping service optical signal to be transmitted or not transmitted.

In a possible implementation, the optical wave adding and dropping device further includes a controller. The controller is used to: output an adjustment signal to the adjustable beam splitter. In the embodiment of the present application, the controller can be set to dynamically adjust the splitting ratio of the adjustable beam splitter. In this application scenario, the splitting ratio of the adjustable beam splitter can change over time to achieve adaptive adjustment in different time periods under the same environment.

In a possible implementation, the optical wave adding and dropping device further includes a photodetector. The controller is also coupled to the third end through the photodetector. The photodetector is used to: output a first power electrical signal to the controller, and the first power electrical signal is used to indicate the optical power at the third end. The controller is specifically used to: output an adjustment signal of a corresponding signal size to the electrode according to the first power electrical signal. In an embodiment of the present application, the signal insertion loss degree of the optical wave adding and dropping device can be judged by detecting the optical power at the third end, specifically: when the optical power at the third end is lower than a certain threshold, it can be considered that the insertion loss degree is large. The corresponding adjustable beam splitter can be adjusted by the controller to make the signal quality higher.

In a possible implementation, the optical wave adding and dropping device further includes a photodetector. The controller is coupled to one of the at least one fifth ends through the photodetector. The photodetector is used to: output a second power electrical signal to the controller; the second power electrical signal is used to indicate the optical power size at a fifth end. The controller is specifically used to: output an adjustment signal of a corresponding signal size to the adjustable beam splitter according to the second power electrical signal. In an embodiment of the present application, the signal insertion loss degree of the optical wave adding and dropping device can be determined by detecting the optical power at the fifth end, specifically: when the optical power at the fifth end is lower than a certain threshold, it can be considered that the insertion loss degree is large. The corresponding adjustable beam splitter can be adjusted by the controller to make the signal quality higher.

In the second aspect, the embodiment of the present application also proposes an optical up/down wave system. The optical up/down wave system includes a first adjustable beam splitter, a first fixed beam splitter, a second adjustable beam splitter, a second fixed beam splitter. The first adjustable beam splitter includes a first down wave end, a second down wave end, a third down wave end, a first down wave transmission waveguide structure, and a down wave electrode. The first fixed beam splitter includes a fourth down wave end, a second down wave transmission waveguide structure, and at least one fifth down wave end. The second adjustable beam splitter includes a first up wave end, a second up wave end, a third up wave end, a first up wave transmission waveguide structure, and an up wave electrode. The first fixed beam splitter includes a fourth up wave end, a second up wave transmission waveguide structure, and at least one fifth up wave end. Among them, the first down wave end is coupled to the second down wave end and the third down wave end respectively through the first down wave transmission waveguide structure. The down wave electrode is coupled to the first down wave transmission waveguide structure. The third down wave end is coupled to the fourth down wave end. The fourth down wave end is coupled to at least one fifth down wave end through the second down wave transmission waveguide structure. The first wave-up end is coupled to the second wave-up end and the third wave-up end respectively through the first wave-up transmission waveguide structure. The wave-up electrode is coupled to the first wave-up transmission waveguide structure. The third wave-up end is coupled to the fourth wave-up end. The fourth wave-up end is coupled to at least one fifth wave-up end through the second wave-up transmission waveguide structure.

In a possible implementation, the second drop-wave port is coupled to the first upload port. The first drop-wave port is used to input a service optical signal and transmit the service optical signal through the second drop-wave port, the first upload port, and the second upload port. At least one fifth drop-wave port is used to split a drop-wave service optical signal from the service optical signal through the third drop-wave port and the fourth drop-wave port. At least one fifth upload port is used to combine the service optical signal into an upload service optical signal through the third upload port and the fourth upload port.

In a possible implementation, the first adjustable beam splitter is used to: input the first service optical signal through the first down-wave port. Output the first service optical signal through the second down-wave port. Split the first down-wave service optical signal from the first service optical signal through the third down-wave port. The first fixed beam splitter is used to: input the first down-wave service optical signal through the fourth down-wave port. Output the first down-wave service optical signal through at least one fifth down-wave port. The second fixed beam splitter is used to: input the second up-wave service optical signal through at least one fifth up-wave port. Output the second up-wave service optical signal through the fourth up-wave port. The second adjustable beam splitter is used to: input the second up-wave service optical signal through the third up-wave port, and input the second service optical signal through the second up-wave port. Combine the second up-wave service optical signal into the second service optical signal. Output the second service optical signal after combining the second up-wave service optical signal through the first up-wave port.

In a possible implementation, the optical wave adding and dropping system further includes a wave adding and dropping optical module, and the wave adding and dropping optical module is respectively coupled to at least one fifth wave dropping end and at least one fifth wave adding end.

In a possible implementation, the up-and-down wave optical modules are coherent optical modules.

In a third aspect, an embodiment of the present application further provides an optical communication device, which includes a circuit board and at least one optical wave add/drop system as described in the second aspect above. The optical wave add/drop system is arranged on the circuit board.

In a fourth aspect, an embodiment of the present application further proposes a chip system. The chip system includes at least one controller and at least one interface circuit. At least one controller and at least one interface circuit can be interconnected via lines. The controller is used to support the chip system to implement the various functions or steps in the above embodiments, and at least one interface circuit can be used to receive signals from other devices (such as memory) or send signals to other devices (such as communication interfaces). The chip system may include chips and may also include other discrete devices.

For the description of the technical principles and technical effects of the second, third and fourth aspects, reference may be made to the relevant description of the first aspect and will not be repeated here.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of an optical wave adding and dropping device provided in an embodiment of the present application;

FIG2 is a structural schematic diagram 1 of an adjustable beam splitter provided in an embodiment of the present application;

FIG3 is a second structural schematic diagram of another adjustable beam splitter provided in an embodiment of the present application;

FIG4 is a third structural schematic diagram of another adjustable beam splitter provided in an embodiment of the present application;

FIG5 is a fourth structural diagram of another adjustable beam splitter provided in an embodiment of the present application;

FIG6 is a schematic diagram of the structure of an optical communication device provided in an embodiment of the present application;

FIG7 is a schematic diagram of the structure of an optical filter assembly provided in an embodiment of the present application;

FIG8 is a schematic diagram of the structure of another optical filter assembly provided in an embodiment of the present application;

FIG9 is a first structural diagram of a sub-wave addition and sub-drop component provided in an embodiment of the present application;

FIG10 is a second structural schematic diagram of another sub-wave addition and sub-drop assembly provided in an embodiment of the present application;

FIG11 is a third structural diagram of another seed wave adding and dropping component provided in an embodiment of the present application;

FIG12 is a fourth structural diagram of another seed wave adding and dropping component provided in an embodiment of the present application;

FIG13 is a schematic diagram of the structure of an optical wave adding and dropping system provided in an embodiment of the present application;

FIG14 is a schematic diagram of the structure of another optical wave adding and dropping system provided in an embodiment of the present application;

FIG15 is a schematic diagram of the structure of a chip system provided in an embodiment of the present application.

DETAILED DESCRIPTION

It should be noted that the terms "first", "second", etc. involved in the embodiments of the present application are only used to distinguish features of the same type and cannot be understood as indicating relative importance, quantity, order, etc.

The terms "exemplary" or "for example" and the like in the embodiments of the present application are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the related concepts in a specific way.

The terms "coupling" and "connection" involved in the embodiments of the present application should be understood in a broad sense. For example, they may refer to a direct physical connection, or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.

First, some basic concepts involved in the embodiments of the present application are explained:

The optical communication network includes at least one optical communication device and a transmission optical fiber. At least one optical communication device includes an optical wave add/drop system and a data processing device. The data processing device of each optical communication device is coupled to the transmission optical fiber through the corresponding optical wave add/drop system. The service optical signal carrying service data is transmitted on the transmission optical fiber. For an optical communication device, the optical wave add/drop system of the optical communication device can split the service optical signal of the transmission optical fiber into a down-wave service optical signal, and convert the down-wave service optical signal into a down-wave service electrical signal and output it to the data processing device. The data processing device obtains the down-wave service data according to the down-wave service electrical signal. In addition, the data processing device can also output an up-wave service electrical signal to the optical wave add/drop system, and the up-wave service electrical signal is used to indicate the up-wave service data. The optical wave add/drop system of the optical communication device can also convert the up-wave service electrical signal into an up-wave service optical signal, and combine the up-wave service optical signal with the service optical signal on the transmission optical fiber. On the transmission optical fiber, different service data are carried on service optical signals of different wavelengths for transmission.

The optical wave adding and dropping system includes a wave dropping device, a wave adding device and a wave adding and dropping optical module. For an optical communication device, the transmission optical fiber coupled to its input end can be regarded as an input optical fiber, and the transmission optical fiber coupled to its output end can be regarded as an output optical fiber. The input optical fiber completes transmission coupling through the wave dropping device, the wave adding device and the output optical fiber. The wave dropping device and the wave adding device are also coupled to the data processing device through the wave adding and dropping optical modules respectively. Among them: the wave dropping device is used to: input the service optical signal from the input optical fiber, output the service optical signal to the wave adding device; and split the wave dropping service optical signal from the service optical signal. The wave adding and dropping optical module is used to: convert the wave dropping service optical signal into the wave dropping service electrical signal, and output the wave dropping service electrical signal to the data processing device. The wave adding service electrical signal is input from the data processing device, and the wave adding service electrical signal is converted into the wave adding service optical signal; and the wave adding service optical signal is output to the wave adding device. The wave adding device is used to: combine the wave adding service optical signal into the service optical signal, and output the service optical signal after combining the wave adding service optical signal to the optical communication device of the next level through the output optical fiber.

There are various ways to implement the add-in and drop-out processing of service optical signals in the optical communication network. One implementation method is to implement the interaction of service optical signals through optical add-drop multiplexers (OADM) or optical add-drop systems at each optical communication device in the optical communication network. The specific implementation principle is to carry different service data on service optical signals of different wavelengths, and transmit service optical signals of different wavelengths through transmission optical fibers. Each optical communication device obtains the service optical signal of the corresponding wavelength (i.e., the drop-out service optical signal) from the service optical signals of different wavelengths through the optical add-drop system, and performs corresponding data processing on the drop-out service optical signal. At the same time, each optical communication device can also generate the add-in service data according to the service requirements, and generate the service optical signal of the corresponding wavelength (i.e., the add-in service optical signal) according to the add-drop service data, and then combine the add-drop service optical signal into the service optical signal of different wavelengths on the transmission optical fiber.

Optionally, the wave-dropping device and/or the wave-up device may be an arrayed waveguide grating (AWG) interface. In an embodiment of the present application, the AWG interface is coupled to the transmission optical fiber, and the AWG interface can split some corresponding fixed-wavelength service optical signals from the transmission optical fiber to obtain the wave-dropping service optical signal, and transmit it to the upper and lower wave optical modules. After the upper and lower wave optical modules perform photoelectric conversion on the wave-dropping service optical signal obtained by the splitting, the wave-drop service electrical signal corresponding to the wave-drop service optical signal of the fixed wavelength is obtained. The data processing device in the optical communication device performs data processing on the wave-drop service electrical signal. Similarly, the fixed-wavelength upper-wave service optical signal can also be combined and processed through the AWG interface. However, because the structure of the waveguide corresponds to different wavelengths of optical signals, it is difficult to achieve wavelength independence when the AWG interface is used in the upper and lower wave scenarios of the service optical signal. Therefore, the application scenarios of the AWG interface are limited.

Optionally, the wave dropping device and/or the wave adding device may use a wavelength selective switch (WSS). In the embodiment of the present application, the wavelength selective switch is used to form an optical switch array to separate optical signals of different wavelengths in the service optical signal, thereby realizing the wave adding and wave dropping functions of the service optical signals of the corresponding wavelengths. However, the setting cost of the wavelength selective switch will be very high.

In order to reduce the device setting cost in the application of adding and dropping the service optical signal, the embodiment of the present application proposes to use a beam splitter to implement the drop device and/or the add device. Depending on the application of the beam splitter, the beam splitter can be used as a coupler (CPL) to realize the function of adding the wave. The beam splitter can also be used as a splitter (SPL) to realize the function of dropping the wave. Optionally, the beam combiner and the beam splitter can use beam splitters of the same structure, or can use beam splitters of different structures.

In some possible implementations, the wave drop device may use a fixed optical beam splitter. In this case, the fixed optical beam splitter includes an unequal ratio coupler and at least one equal ratio coupler. The unequal ratio coupler splits the wave drop service optical signal from the service optical signal in an unequal ratio splitting manner and outputs it to the equal ratio coupler. At least one equal ratio coupler splits the input wave drop service optical signal into multiple wave drop service optical signals in an equal ratio splitting manner and outputs them to the data processing device.

In some possible implementations, the wave-adding device may use a fixed optical beam splitter. The fixed optical beam splitter includes an unequal ratio coupler and at least one equal ratio coupler. At this time, the equal ratio coupler inputs the wave-adding service optical signal and outputs the wave-adding service optical signal to the unequal ratio coupler. The unequal ratio coupler combines the wave-adding service optical signal into the service optical signal.

In the application scenario of adding and dropping service optical signals, no application method based on beam splitters as optical combiners and/or optical splitters has been found. The use of beam splitters can greatly reduce the cost of components for adding and dropping waves. However, in the application scenario of using beam splitters as optical combiners and/or optical splitters, the optical combiners and optical splitters cause large insertion losses to the service optical signals on the transmission optical fiber. Therefore, although the use of optical combiners and optical splitters can make the application independent of wavelength, in this application scenario, it is necessary to set an optical power amplifier in each optical communication device to increase the optical power on the transmission optical fiber, so as to achieve compensation for the transmission insertion loss. In addition, the beam splitter uses a fixed splitting ratio (that is, the optical power ratio between the service optical signal input by the optical combiner and the upper wave service optical signal is fixed, and/or, the optical power ratio between the service optical signal output by the optical splitter and the lower wave service optical signal is fixed). However, in the construction of optical communication networks, the actual optimal splitting ratio required is different in different environments and scenarios. It is even possible that the optimal splitting ratio required is different at different times in a scenario. Then, in order to reduce the operating expense (OPEX), when using a beam splitter with a fixed splitting ratio as a combiner and/or splitter, it is necessary to plan the splitting ratio corresponding to each wave add/drop system according to the splitting ratio corresponding to the worst case during the construction of the optical communication network. In this case, the beam splitter will cause greater insertion loss, making each optical communication device more dependent on the optical power amplifier.

In some possible implementations, the beam splitter in the wave-dropping device is set as an adjustable beam splitter. The wave-dropping splitting ratio of the optical communication device can be adjusted by adjusting the splitting ratio of the adjustable beam splitter to a fixed splitting ratio of a certain fixed value. As shown in FIG1 , the wave-dropping device A may include a first adjustable beam splitter A11 and a first fixed beam splitter A12. The first adjustable beam splitter A11 includes a first wave-dropping end A111, a second wave-dropping end A112, a third wave-dropping end A113, a first wave-dropping transmission waveguide structure A114, and a wave-dropping electrode A115. The first fixed beam splitter A12 includes a fourth wave-dropping end A121, a second wave-dropping transmission waveguide structure A122, and at least one fifth wave-dropping end A123. Among them, the first wave-dropping end A111 is coupled to the input optical fiber 21. The first wave-dropping end A111 is coupled to the second wave-dropping end A112 and the third wave-dropping end A113 respectively through the first wave-dropping transmission waveguide structure A114. The lower wave electrode A115 is coupled to the first lower wave transmission waveguide structure A114. The third lower wave end A113 is coupled to the fourth lower wave end A121. The fourth lower wave end A121 is coupled to at least one fifth lower wave end A123 through the second lower wave transmission waveguide A122 structure. At least one fifth lower wave end A123 is coupled to the upper and lower wave optical module 111.

Exemplarily, the first wavelet terminal A111 is used to input a service optical signal, and transmit the service optical signal to the second wavelet terminal A112 through the first wavelet transmission waveguide structure A114. In this process, the third wavelet terminal A113 splits a part of the service optical signal transmitted on the first wavelet transmission waveguide structure A114 as a wavelet service optical signal. The fourth wavelet terminal A121 inputs the wavelet service optical signal, and outputs it to at least one fifth wavelet terminal A123 through the second wavelet transmission waveguide structure A122. Among them, the number of the fifth wavelet terminals A123 is related to the number of wavelet service optical signals required in the application scenario of time. The lower wave electrode A115 is arranged on the first lower wave transmission waveguide structure A114, and the lower wave electrode A115 receives the lower wave adjustment signal; after the lower wave electrode A115 receives the lower wave adjustment signal of different signal sizes, it will change the refractive index of the first lower wave transmission waveguide structure A114 for the transmitted optical signal, and through the change of the refractive index, different splitting ratios are presented between the business optical signal output by the first adjustable beam splitter A11 and the lower wave business optical signal. Since the optical power ratio between the fourth lower wave end A121 and the fifth lower wave end A123 is fixed, the signal size of the lower wave adjustment signal can correspond to the ratio of the first optical power of different ratios. Among them, the first optical power ratio is the optical power ratio between the first lower wave end A111 and at least one fifth lower wave end A123.

Optionally, the lower wave adjustment signal may be a lower wave adjustment voltage signal or a lower wave adjustment current signal.

For example, when setting up an optical communication network, different fixed splitting ratios can be planned and designed for each optical communication site (i.e., optical communication equipment). For a certain optical communication equipment, it is only necessary to output a drop adjustment signal of a corresponding signal size to the first adjustable beam splitter A11 according to the planned fixed splitting ratio, so that the optical power between the service optical signal output by the optical communication equipment during the drop processing and the drop service optical signal is included in the required fixed value.

Optionally, as shown in FIG2 , the first adjustable beam splitter A11 may be a Y-branch type beam splitter. Optionally, as shown in FIG3 , the first adjustable beam splitter A11 may be a Mach–Zehnder interferometer (MZI) beam splitter with a multi-mode interference coupler (MMI coupler). Exemplarily, as shown in FIG4 , the first adjustable beam splitter A11 may be an MZI beam splitter with a directional coupler (DC). Optionally, as shown in FIG5 , the first adjustable beam splitter A11 may be a beam splitter with a DC structure.

Exemplarily, the first fixed beam splitter A12 may be a one-to-many coupler. The first fixed beam splitter A12 may also be a one-to-many transmission waveguide structure. The first fixed beam splitter A12 may also include a plurality of cascaded one-to-many couplers.

In an embodiment of the present application, in the process of planning and designing the optical communication network, different fixed splitting ratios can be set for different optical communication devices according to actual planning requirements. In this case, there is no need to set the fixed splitting ratios of all optical communication devices to the fixed splitting ratios corresponding to the worst case. In this way, the transmission channel of the service optical signal on the transmission optical fiber can be made more stable, and the transmission insertion loss of the service optical signal can be reduced. On this basis, there is no need to set an optical power amplifier on each optical communication device. In summary, the embodiment of the present application uses a beam splitter to implement wavelet processing. Compared with the use of an AWG interface or a wavelength selection switch for wavelet processing, the cost of the device can be reduced when wavelength-independent applications are implemented; at the same time, based on the first adjustable beam splitter A11, the splitting ratio in the wavelet processing process can be adjusted, thereby reducing the insertion loss of the optical signal and improving the transmission of the service optical signal. Finally, when the transmission quality of the service optical signal is higher, the number of optical power amplifiers can be appropriately reduced to reduce system complexity and cost.

In some possible implementations, as shown in Fig. 6, the wave-dropping device A further includes a first wave-dropping sub-assembly Z1. The first wave-dropping sub-assembly Z1 is coupled to the first wave-dropping end A111.

Optionally, as shown in FIG6 , the optical wave add/drop system 11 further includes a monitoring optical transceiver module 112. The optical communication device 1 further includes an optical monitoring processing device 14. The monitoring optical transceiver module 112 is coupled to the first sub-wave add/drop component Z1 and the optical monitoring processing device 14, respectively. The first sub-wave add/drop component Z1 is used to: input the service optical signal and the wave drop monitoring optical signal through the input optical fiber 21, and output the service optical signal to the first wave drop terminal A111, and output the wave drop monitoring optical signal to the optical monitoring processing device 14. The optical monitoring processing device 14 is used to: detect the channel transmission quality of the optical signal on the input optical fiber 21 side according to the input wave drop monitoring optical signal.

For example, the optical monitoring processing device 14 can be an optical supervisory channel (OSC) processing device. In an embodiment of the present application, a first sub-add/drop component Z1 can be added to the optical add/drop system 11. The first sub-add/drop component Z1 is used to monitor the drop of the optical signal. In optical communication, it is often necessary to set a monitoring optical signal to transmit the signal transmission quality and the interaction information of the optical communication equipment. The related drop components of the monitoring optical signal and the drop of the service optical signal can be integrated in the optical add/drop system 11, so as to reduce the system complexity, reduce the cost, etc.

Exemplarily, as shown in FIG6 , the optical wave add/drop system 11 further includes a diagnostic optical transceiver module 113. The optical communication device 1 further includes an optical diagnostic processing device 15. The diagnostic optical transceiver module 113 is coupled to the first sub wave add/drop component Z1 and the optical diagnostic processing device 15, respectively. The optical diagnostic processing device 15 is used to output a diagnostic optical signal to the first sub wave add/drop component Z1. The first sub wave add/drop component Z1 is also used to send the diagnostic optical signal to the input optical fiber 21, and output a scattered signal and a refraction signal of the diagnostic optical signal to the diagnostic optical transceiver module 113. The optical diagnostic processing device 15 is also used to detect transmission loss, breakpoints and other problems on the input optical fiber 21 side according to the scattered signal and the refraction signal of the diagnostic optical signal. The first sub wave add/drop component Z1 is used to input a service optical signal and a wave drop monitoring optical signal through the input optical fiber 21, and output the service optical signal to the first wave drop terminal A111, and output the wave drop monitoring optical signal to the optical monitoring processing device 14. The optical monitoring processing device 14 detects the channel transmission quality of the optical signal on the input optical fiber 21 side according to the input wave drop monitoring optical signal.

Optionally, the optical diagnosis processing device 15 may be an optical time domain reflectometer (OTDR) or an optical frequency domain reflectometer (OFDR).

In the embodiment of the present application, in optical communication, there are many transmission lines involved, and the distance spanned is also very large, so it is difficult to inspect each distributed optical fiber. At this time, a diagnostic optical signal can be emitted to the input optical fiber 21. The diagnostic optical signal will generate corresponding scattered signals and emission signals due to the Rayleigh scattering effect and the Fresnel reflection effect. According to the scattered signal and the reflection signal, it can be determined whether the transmission cable on the side of the input optical fiber 21 has problems such as loss and breakpoints. By integrating the relevant interface structure of the diagnostic optical signal in the optical wave adding and dropping system 11, the system integration can be improved, the cost can be reduced, etc.

Exemplarily, the first sub-wavelength up/down component Z1 can be based on an optical filter component. Optionally, as shown in FIG7 , the optical filter component can be a cascade-based MZI filter. Optionally, as shown in FIG8 , the optical filter component can also be a filter based on a grating structure. Optionally, the optical filter component can also be a thin film filter.

Exemplarily, as shown in Fig. 9, the first sub-wavelength addition and sub-addition component Z1 includes a first filter Z11. The first filter Z11 is respectively coupled with the input optical fiber 21, the first wavelength drop end A111, the monitoring optical transceiver module 112, and the diagnostic optical transceiver module 113. In the embodiment of the present application, the monitoring optical signal drop and the diagnostic optical signal addition can be realized by a filter.

Exemplarily, as shown in FIG10 , the first sub-wavelength addition and sub-subassembly Z1 includes a first filter Z11 and a second filter Z12. The first filter Z11 and the second filter Z12 are connected in series. The first filter Z11 is coupled to the input optical fiber 21 and the second filter Z12 respectively; the second filter Z12 is coupled to the first wavelength reduction end A111. At this time, the first filter Z11 is also coupled to the monitoring optical transceiver module 112; the second filter Z12 is also coupled to the diagnostic optical transceiver module 113. In addition to the embodiment shown in FIG10 , another embodiment is to couple the second filter Z12 to the monitoring optical transceiver module 112, and to couple the first filter Z11 to the diagnostic optical transceiver module 113.

In the embodiment of the present application, the first filter Z11 and the second filter Z12 are connected in series. In the series structure, the order of the first filter Z11 and the second filter Z12 is not limited. One of the filters is used to realize the wavelet of the monitoring optical signal, and the other filter is used to realize the refraction and scattering of the diagnostic optical signal. The specific principles and methods of refraction and scattering can refer to the embodiment shown in Figure 9, which will not be repeated here.

Exemplarily, as shown in FIG11 , the first sub-wavelength addition and sub-drop component Z1 includes a first filter Z11 and a second filter Z12. The first filter Z11 is coupled to the input optical fiber 21, the first wavelength reduction end A111, and the second filter Z12, respectively. The second filter Z12 is also coupled to the monitoring optical transceiver module 112 and the diagnostic optical transceiver module 113. In an embodiment of the present application, the first filter Z11 outputs the wavelength reduction monitoring optical signal to the second filter Z12, and outputs it to the monitoring optical transceiver module 112 through the second filter Z12. In addition, the second filter Z12 also inputs the diagnostic optical signal from the diagnostic optical transceiver module 113, and outputs the diagnostic optical signal to the input optical fiber 21 through the first filter Z11. The first filter Z11 inputs the scattered signal and the reflected signal of the diagnostic optical signal from the input optical fiber 21. And outputs it to the diagnostic optical transceiver module 113 through the second filter Z12.

Exemplarily, as shown in Fig. 12, the first sub-wavelength addition and sub-addition component Z1 includes a first filter Z11, a second filter Z12 and a third filter Z13. The first filter Z11 is coupled to the input optical fiber 21, the first wavelength addition end A111, the second filter Z12 and the third filter Z13 respectively. Among them, the second filter Z12 is coupled to the monitoring optical transceiver module 112, and the third filter Z13 is coupled to the diagnostic optical transceiver module 113.

In the embodiment of the present application, the first filter Z11 outputs the down-wave monitoring optical signal to the second filter Z12, and the second filter Z12 outputs the down-wave monitoring optical signal to the monitoring optical transceiver module 112. The diagnostic optical signal is input from the diagnostic optical transceiver module 113 through the third filter Z13, and the diagnostic optical signal is output to the input optical fiber 21 through the first filter Z11. The first filter Z11 then inputs the reflected signal and scattered signal of the diagnostic optical signal from the input optical fiber 21, and outputs the reflected signal and scattered signal to the diagnostic optical transceiver module 113 through the second filter Z12.

In some possible implementations, the splitting ratio of the wavelet of a certain optical communication device can be dynamically adjusted by dynamically controlling the splitting ratio of the first adjustable beam splitter A11. At this time, the optical wavelet adding and dropping system 11 also includes a first controller. The first controller can generate different wavelet adjustment signals to the wavelet electrode A115 through network planning or received real-time instructions, so as to dynamically adjust the splitting ratio of the first adjustable beam splitter A11. Optionally, the first controller is arranged in the wavelet device A. Optionally, the first controller is arranged outside the wavelet device A.

In some possible implementations, the first controller is coupled to the lower wave electrode A115. The first controller is used to output a lower wave adjustment signal to the lower wave electrode A115 of the first adjustable beam splitter A11.

In some possible implementations, the wave download device A further includes a first photodetector.

Optionally, when the first controller is disposed in the wavelet device A, the input end of the first photodetector is coupled to the third wavelet terminal A113, and the output end of the first photodetector is coupled to the first controller. Regarding the connection relationship of the first photodetector when the first controller is disposed outside the wavelet device A, reference can be made to the relevant description of the aforementioned embodiment, which will not be repeated here. In the embodiment of the present application, the first photodetector obtains the wavelet service optical signal at the third wavelet terminal A113, and can determine whether the splitting ratio of the first adjustable beam splitter A11 needs to be adjusted based on the optical power at the third wavelet terminal A113. Because the optical power of the wavelet service optical signal at the third wavelet terminal A113 can be regarded as equal to the optical power of the wavelet service optical signal at the fourth wavelet terminal A121. The optical power at the fourth wavelet terminal A121 is in a fixed proportional relationship with the optical power at the fifth wavelet terminal A123. When the optical power at the third wavelet terminal A113 is lower than a certain threshold, the optical power of the wavelet service optical signal output at at least one fifth wavelet terminal A123 may be low, affecting the stability and signal quality of the wavelet. At this time, the first adjustable beam splitter A11 can be adjusted by a wavelet adjustment signal to increase the optical power at the third wavelet terminal A113.

Optionally, when the first controller is disposed outside the wavelet device A, the input end of the first photodetector can be coupled to one of the at least one fifth wavelet terminals A123, and the output end of the first photodetector is coupled to the first controller. When the first controller is disposed inside the wavelet device A, the connection relationship of the first photodetector can refer to the relevant description of the aforementioned embodiment, which will not be repeated here. In the embodiment of the present application, the first photodetector converts a wavelet service optical signal at a fifth wavelet terminal A123 into a wavelet service electrical signal and outputs it to the first controller. When the optical power at the fifth wavelet terminal A123 is lower than a certain threshold value, the first controller can increase the optical power at the third wavelet terminal A113 through a wavelet adjustment signal to increase the optical power of the wavelet service optical signal at the fifth wavelet terminal A123.

In some possible implementations, the wave-loading splitting ratio of the optical communication device can be adjusted by adjusting the splitting ratio of the second adjustable beam splitter B11 to a fixed splitting ratio of a certain fixed value. As shown in FIG1 , the wave loading device B may include a second adjustable beam splitter B11 and a second fixed beam splitter B12; the first adjustable beam splitter B11 includes a first wave loading end B111, a second wave loading end B112, a third wave loading end B113, a first wave loading transmission waveguide structure B114, and a wave loading electrode B115. The first fixed beam splitter B12 includes a fourth wave loading end B121, a second wave loading transmission waveguide structure B122, and at least one fifth wave loading end B123. Among them, the first wave loading end B111 is coupled to the output optical fiber 22. The first wave loading end B111 is coupled to the second wave loading end B112 and the third wave loading end B113 respectively through the first wave loading transmission waveguide structure B114. The wave loading electrode B115 is coupled to the first wave loading transmission waveguide structure B114. The third uplink end B113 is coupled to the fourth uplink end B121. The fourth uplink end B121 is coupled to at least one fifth uplink end B123 through the second uplink transmission waveguide B122 structure. The at least one fifth uplink end B123 is coupled to the uplink and downlink optical module 111.

Exemplarily, the second up-wave port B112 inputs a service optical signal from the second down-wave port A112 of the down-wave device A, and outputs the service optical signal to the first up-wave port B111 through the first up-wave transmission waveguide structure B114. At least one fifth up-wave port B123 inputs the up-wave service optical signal from the data processing device 12 through the up-and-down optical module 111. The second fixed beam splitter B12 outputs the up-wave service optical signal to the third up-wave port B113 of the second adjustable beam splitter B11 through the fourth up-wave port B121. The second adjustable beam splitter B11 outputs the up-wave service optical signal to the first up-wave port B111 through the first up-wave transmission waveguide structure B114. The first up-wave port B111 outputs the service optical signal combined with the up-wave service optical signal to the output optical fiber 22.

In the embodiment of the present application, the structure of the wave-adding device B can refer to the structural description of the wave-dropping device A. However, the wave-dropping device A uses the beam splitter as a beam splitter, and the direction of the optical signal is to split from the first end to the second end and the third end. The wave-adding device B uses the beam splitter as a light combiner, and the direction of the optical signal is to combine from the second end and the third end to the first end and output. In the embodiment of the present application, the wave-adding device B can realize the combination of the wave-adding service optical signal into the service optical signal. Regarding the technical effects of the second adjustable beam splitter B11 and the second fixed beam splitter B12, reference can be made to the relevant descriptions of the first adjustable beam splitter A11 and the first fixed beam splitter A12, which will not be repeated here.

In some possible implementations, as shown in FIG6 , the optical wave add/drop system 11 further includes a second wave add/drop sub-assembly Z2 . The second wave add/drop sub-assembly Z2 is coupled to the first wave add/drop end B111 and the output optical fiber 22 .

Exemplarily, as shown in FIG6 , the monitoring optical transceiver module 112 is also coupled to the second sub-add/drop wave assembly Z2. The optical monitoring processing device 14 outputs the uplink monitoring optical signal to the second sub-add/drop wave assembly Z2 through the monitoring optical transceiver module 112. At the same time, the second sub-add/drop wave assembly Z2 also receives the service optical signal output by the first uplink terminal B111, and combines the uplink monitoring optical signal with the service optical signal output by the first uplink terminal B111 and outputs the combined signal to the output optical fiber 22.

In the embodiment of the present application, a second sub-add/drop component Z2 may be added to the optical add/drop system 11. The second sub-add/drop component Z2 is used to monitor the addition of optical signals. In optical communications, it is often necessary to set a monitoring optical signal to transmit the signal transmission quality and the interactive information of the optical communication network. The relevant addition components for monitoring the optical signal and the addition of the service optical signal may be integrated in the optical add/drop system 11, thereby reducing the system complexity, reducing the cost, etc.

Exemplarily, as shown in FIG6 , the diagnostic optical transceiver module 113 is also coupled to the second sub-wave up/down component Z2. The optical diagnostic processing device 15 is also used to: output a diagnostic optical signal to the second sub-wave up/down component Z2. The second sub-wave up/down component Z2 is also used to: send the diagnostic optical signal to the output optical fiber 22, and output the scattered signal and the refracted signal of the diagnostic optical signal to the diagnostic optical transceiver module 113. The optical diagnostic processing device 15 is also used to: detect the transmission loss, breakpoints and other problems on the output optical fiber 22 side according to the scattered signal and the refracted signal of the diagnostic optical signal. For the description of the technical principle and technical effect of realizing the up-wave of the diagnostic optical signal and the down-wave of the reflected signal and the scattered signal of the diagnostic optical signal by the second sub-wave up/down component Z2, reference can be made to the relevant description of the first sub-wave up/down component Z1 in the aforementioned embodiment, which will not be repeated here.

In some possible implementations, the second sub-add/drop wave assembly Z2 can be based on an optical filter assembly. For the specific structure of the second sub-add/drop wave assembly Z2, reference can be made to the specific structure of the first sub-add/drop wave assembly Z1 in the above embodiment, which will not be repeated here.

In some possible implementations, the splitting ratio of the optical beam of a certain optical communication device can be dynamically adjusted by dynamically controlling the splitting ratio of the second adjustable beam splitter B11. In this case, the optical wave adding and dropping system 11 also includes a second controller. The second controller can generate different wave adding adjustment signals to the wave adding electrode B115 by means of network planning or received real-time instructions, so as to dynamically adjust the splitting ratio of the second adjustable beam splitter B11. Optionally, the second controller is arranged in the wave adding device B. Optionally, the second controller is arranged outside the wave adding device B.

In some possible implementations, the second controller is coupled to the upper wave electrode B115. The second controller is used to output an upper wave adjustment signal to the upper wave electrode B115 of the second adjustable beam splitter B11.

In some possible implementations, the wave loading device B further includes a second photodetector.

Optionally, when the second controller is arranged in the wave-adding device B, the input end of the second photodetector B13 is coupled to the third wave-adding terminal B113, and the output end of the second photodetector B13 is coupled to the second controller. Regarding the connection relationship of the second photodetector B13 when the second controller is arranged outside the wave-adding device B, reference can be made to the relevant description of the aforementioned embodiment, which will not be repeated here. In the embodiment of the present application, the second photodetector B13 obtains the wave-adding service optical signal at the third wave-adding terminal B113, and it can be judged whether the splitting ratio of the second adjustable beam splitter B11 needs to be adjusted according to the optical power at the third wave-adding terminal B113. Because the optical power of the wave-adding service optical signal at the third wave-adding terminal B113 is substantially equal to the optical power of the wave-adding service optical signal at the fourth wave-adding terminal B121. And the optical power at the fourth wave-adding terminal B121 is in a fixed proportional relationship with the optical power at the fifth wave-adding terminal B123. When the optical power at the third wavelet end B113 is lower than a certain threshold, it means that the optical power of the wavelet service optical signal outputted from at least one fifth wavelet end B123 may be low, which affects the stability and signal quality of the wavelet. At this time, the second adjustable beam splitter B11 can be adjusted by the wavelet adjustment signal to increase the optical power at the third wavelet end B113. The closer the optical power of the wavelet service optical signal is to the service optical signal inputted from the second wavelet end B112, the flatter the overall channel spectrum of the service signal outputted from the first wavelet end B111 of the second adjustable beam splitter B11.

Optionally, when the second controller is arranged outside the waveadding device B, the input end of the second photodetector B13 can be coupled with one of the at least one fifth waveadding terminals B123, and the output end of the second photodetector B13 is coupled with the second controller. When the second controller is arranged inside the waveadding device B, the connection relationship of the second photodetector B13 can refer to the relevant description of the aforementioned embodiment, which will not be repeated here. In the embodiment of the present application, the second photodetector B13 converts a waveadding service optical signal at a fifth waveadding terminal B123 into a waveadding service electrical signal and outputs it to the second controller. When the optical power at the fifth waveadding terminal B123 is lower than a certain threshold value, the second controller can increase the optical power at the third waveadding terminal B113 through a waveadding adjustment signal to improve the channel spectrum flatness of the signal output by the first waveadding terminal.

In some possible implementations, the optical wave adding and dropping system 11 further includes at least one second adjustment component. The at least one second adjustment component is correspondingly coupled to the at least one fifth wave adding end B123. The at least one second adjustment component is also coupled to the second controller.

Optionally, the second adjustment component may be a variable optical attenuator. The second controller may output an attenuation control signal to one or more variable optical attenuators in the at least one variable optical attenuator. The attenuation control signal is used to adjust the optical power attenuation degree of the corresponding add-in service optical signal input by the fifth add-in port B123.

Exemplarily, the second controller may also control the variable attenuator on the corresponding fifth wave-adding end B123 to attenuate to a closed state through an attenuation control signal.

Exemplarily, the second controller first determines the wavelength of the upper-wavelength service optical signal to be transmitted. When the wavelength of a certain upper-wavelength service optical signal does not conflict with the wavelength of the service optical signal on the transmission optical fiber, the corresponding upper-wavelength service optical signal is output to the transmission optical fiber through a variable attenuator, so as to avoid service interference caused by different service optical signals at the same wavelength.

In the embodiment of the present application, by controlling the attenuation degree of the variable attenuator, the optical signal of the added wave service can be transmitted with a certain attenuation degree, and the corresponding optical signal of the added wave service can also be controlled not to be transmitted.

Optionally, the second adjustment component may be an optical switch. The second controller may output a switch control signal to one or more optical switches in the at least one optical switch, and control a certain optical switch to be turned on or off through the switch control signal. Regarding the technical effect of controlling the optical switch to be turned on or off, reference may be made to the relevant description of the above embodiment of controlling whether the upper wave optical service signal is transmitted by a variable attenuator, which will not be repeated here.

In some possible implementations, the optical wave drop/drop system 11 further includes at least one first adjustment component. At least one fifth wave drop terminal A123 is coupled to at least one first adjustment component, and at least one fifth wave drop terminal A123 is coupled to the wave drop/drop optical module 111 through the corresponding first adjustment component. In the embodiment of the present application, the first adjustment component can be used to control whether the wave drop device A outputs a wave drop service optical signal to the wave drop/drop optical module 111. For the description of the first adjustment component, reference can be made to the description in the above embodiment of the second adjustment component, which will not be repeated here.

In some possible implementations, the optical wave adding and dropping system 11 further includes a second channel power equalizer. The second channel power equalizer is coupled to the first wave adding end B111 of the wave adding device B. Exemplarily, the second channel power equalizer may adopt a cascaded MZI waveguide structure. In the embodiment of the present application, the second channel power equalizer may be set to a fixed equalization spectrum line through link testing or link analysis.

In some possible implementations, the second channel equalizer is also coupled to the second controller. The second controller is also used to output an equalization control signal to the second channel equalizer. The equalization control signal is used to adjust the channel power of the second channel equalizer to adjust the equalization spectrum of the second channel equalizer to the desired optimal equalization spectrum. In the embodiment of the present application, the optical power of the service optical signal output by the optical add/drop system 11 can be made more balanced by setting the second channel equalizer. In particular, in the optical add/drop system 11 after integrating the monitoring optical signal and/or the diagnostic optical signal, the equalization effect of the second channel equalizer is better.

In some possible implementations, the optical wavelet drop/drop system 11 further includes a first channel power equalizer. The first channel power equalizer is coupled to the first wavelet drop terminal A111 of the wavelet drop device A. For the description of the technical principle and technical effect of the first channel power equalizer, reference may be made to the related description of the second channel power equalizer, which will not be repeated here.

Optionally, the wave-dropping device A may be a separate planar lightwave circuit (PLC) chip. The wave-adding device B may also be a separate planar lightwave circuit chip. Optionally, the wave-dropping device A and the wave-adding device B may also be integrated on a planar lightwave circuit chip.

In the above embodiment, only one group of service optical signals is added and dropped. In some possible implementations, the optical adding and dropping system 11 can transmit service optical signals on multiple groups of different transmission optical fibers 2 .

Exemplarily, as shown in FIG13, the optical add/drop system 11 performs add/drop operations on two groups of service optical signals, respectively, and the two groups of service optical signals are respectively the first service optical signal and the second service optical signal. At this time, the optical add/drop system 11 includes a first add/drop device group 11A and a second add/drop device group 11B, and each group of add/drop devices includes a drop device A and a load device B coupled to each other. As shown in FIG13, the drop device A and the load device B in the first add/drop device group 11A are used to perform add/drop operations on the first service optical signal. The drop device A and the load device B in the second add/drop device group 11B are used to perform add/drop operations on the second service optical signal.

Optionally, as shown in FIG13, the first up/down wave device group 11A and the second up/down wave device group 11B can be integrated on a planar optical path chip. Optionally, as shown in FIG13, the first up/down wave device group 11A can be integrated on a planar optical path chip. The second up/down wave device group 11B can be integrated on another planar optical path chip. Optionally, as shown in FIG13, each up/down wave device A and each down/down wave device B are respectively integrated on an independent planar optical path chip. Optionally, as shown in FIG14, the down/down wave devices A and B, which are used in the up/down waves of different service optical signals and are not coupled to each other, can be integrated on a planar optical path chip. The propagation directions of the first service optical signal and the second service optical signal in FIG13 and FIG14 are only examples. In actual applications, different service optical signals can be service optical signals with the same propagation direction or service optical signals with different propagation directions. Regarding the technical principles and technical effects of the wave dropping device A and the wave adding device B when applied to adding and dropping waves of different service optical signals, reference may be made to the relevant description in the above embodiments when the wave dropping device A and the wave adding device B are applied to adding and dropping waves of the same service optical signal, which will not be repeated here.

In some possible implementations, the add/drop optical module 111 is a coherent optical module. In the embodiment of the present application, when performing the drop processing, the dropped service optical signal is a service optical signal of all wavelengths on the transmission optical fiber 2. At this time, by adjusting the wavelength of the local oscillator light source of the coherent optical module, it is possible to control the coherent optical module to receive one or more dropped service optical signals of specific wavelengths.

In some possible implementations, the optical wave adding and dropping system 11 can be integrated on a circuit board. The embodiment of the present application proposes an optical wave adding and dropping device, an optical wave adding and dropping system and an optical communication device, wherein the optical wave adding and dropping device includes a beam splitter. The present application applies the beam splitter to the optical wave adding and dropping processing. At the same time, the beam splitter in the optical wave adding and dropping device adopts an adjustable beam splitter. The adjustable beam splitter is used to adjust the splitting ratio when the service optical signal is processed by the wave adding and dropping and/or the splitting ratio when the service optical signal is processed by the wave dropping and/or the wave dropping. In addition, the embodiment of the present application can also integrate the wave adding and dropping processing of the monitoring optical signal and/or the diagnostic optical signal in the optical wave adding and dropping device. In the embodiment of the present application, the cost of the optical wave adding and dropping system is reduced by using a beam splitter. By setting a coherent optical module, the selection of the wave dropping of the service optical signal of different wavelengths is realized. The splitting ratio of different optical communication devices is adjusted by an adjustable beam splitter, so that the planning and design of the optical communication network composed of multiple optical communication devices is more flexible. The embodiments of the present application reduce the insertion loss of optical signal transmission through the above-mentioned settings, improve the transmission quality of optical signals, improve the planning flexibility of optical communication networks, reduce the dependence of optical communication equipment on optical power amplifiers, and improve the integration of optical wave addition and drop systems. The embodiments of the present application also greatly reduce the device cost of optical wave addition and drop systems.

The embodiment of the present application also provides a chip system, as shown in FIG15, the chip system 3 includes at least one controller 31 and at least one interface circuit 32. At least one controller 31 and at least one interface circuit 32 can be interconnected through lines. The controller 31 is used to support the chip system to implement various functions or steps in the above method embodiment, and at least one interface circuit 32 can be used to receive signals from other devices (such as memory) or send signals to other devices (such as communication interfaces). The chip system 3 may include chips and may also include other discrete devices.

The controller involved in the embodiments of the present application may be a chip. For example, it may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips.

It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the modules and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and modules described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one device or distributed on multiple devices. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional module in each embodiment of the present application may be integrated into one device, or each module may exist physically separately, or two or more modules may be integrated into one device.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loading and executing computer program instructions on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or may contain one or more servers, data centers and other data storage devices that can be integrated with a medium. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (17)

1. The light up-down wave device is characterized by comprising an adjustable beam splitter and a fixed beam splitter; the adjustable beam splitter comprises a first end, a second end, a third end, a first transmission waveguide structure and an electrode; the fixed beam splitter comprises a fourth end, a second transmission waveguide structure and at least one fifth end; the first end is respectively coupled with the second end and the third end through the first transmission waveguide structure; the electrode is coupled to the first transmission waveguide structure; the third terminal is coupled to the fourth terminal; the fourth end is coupled with the at least one fifth end through the second transmission waveguide structure; wherein:

the first end and the second end are used for transmitting service optical signals;

The at least one fifth end is configured to: through the third end and the fourth end, a downlink service optical signal is split from the service optical signal; or the uplink service optical signal is optically combined into the service optical signal through the third end and the fourth end;

the electrode is used for: an adjustment signal is input, the signal magnitude of which is used to indicate a ratio of a first optical power between the optical power at the first end and the optical power at the at least one fifth end.

2. The apparatus of claim 1, wherein the at least one fifth end is further coupled to an up-down wave optical module.

3. The apparatus of claim 2, wherein the up-down wave optical module is a coherent optical module.

4. A device according to any one of claims 1 to 3, wherein the optical up-down wave device further comprises a sub up-down wave assembly; the sub-up-down wave assembly is coupled to the first end;

The sub-up-down wave component is used for realizing at least one of the following functions:

outputting a monitoring light signal to the first end; or inputting the monitoring light signal from the first end;

A diagnostic light signal is output to the first end, and a reflected signal of the diagnostic light signal and a scattered signal of the diagnostic light signal are input from the first end.

5. The apparatus of claim 4, wherein the sub-up-down wave assembly is further coupled with a diagnostic optical transceiver module.

6. The apparatus of claim 4 or 5, wherein the sub-up-down wave assembly is further coupled to a supervisory optical transceiver module.

7. The apparatus of any one of claims 1-6, wherein the optical up-down wave device further comprises at least one variable optical attenuator; the at least one variable optical attenuator is coupled to the at least one fifth end.

8. The apparatus of any one of claims 1-6, wherein the optical up-down wave apparatus further comprises at least one optical switch; the at least one optical switch is correspondingly coupled to the at least one fifth end.

9. The apparatus of any one of claims 1-8, wherein the optical up-down wave apparatus further comprises a controller; the controller is configured to output the adjustment signal to the adjustable beam splitter.

10. The apparatus of claim 9, wherein the optical up-down wave device further comprises a photodetector; the controller is further coupled to the third terminal through the photodetector;

The photodetector is used for: outputting a first power electrical signal to the controller; the first power electrical signal is used for indicating the optical power magnitude at the third end;

The controller is specifically used for: and outputting the adjusting signal of the corresponding signal size to the electrode according to the first power electric signal.

11. The apparatus of claim 9, wherein the optical up-down wave device further comprises a photodetector; the controller is coupled to one of the at least one fifth end through the photodetector;

the photodetector is used for: outputting a second power electrical signal to the controller; the second power electrical signal is used for indicating the optical power magnitude at the fifth end;

the controller is specifically used for: and outputting the adjusting signal of the corresponding signal size to the adjustable beam splitter according to the second power electric signal.

12. An optical up-down wave system is characterized by comprising a first adjustable beam splitter, a first fixed beam splitter, a second adjustable beam splitter and a second fixed beam splitter; the first adjustable beam splitter comprises a first lower wave end, a second lower wave end, a third lower wave end, a first lower wave transmission waveguide structure and a lower wave electrode; the first fixed beam splitter comprises a fourth lower wave end, a second lower wave transmission waveguide structure and at least one fifth lower wave end; the second adjustable beam splitter comprises a first upper wave end, a second upper wave end, a third upper wave end, a first upper wave transmission waveguide structure and an upper wave electrode; the first fixed beam splitter comprises a fourth upper wave end, a second upper wave transmission waveguide structure and at least one fifth upper wave end; wherein:

The first lower wave end is respectively coupled with the second lower wave end and the third lower wave end through the first lower wave transmission waveguide structure; the lower wave electrode is coupled to the first lower wave transmission waveguide structure; the third lower wave end is coupled with the fourth lower wave end; the fourth lower wave end is coupled with the at least one fifth lower wave end through the second lower wave transmission waveguide structure;

The first upper wave end is respectively coupled with the second upper wave end and the third upper wave end through the first upper wave transmission waveguide structure; the upper wave electrode is coupled to the first upper wave transmission waveguide structure; the third upper wave end is coupled with the fourth upper wave end; the fourth upper wave end is coupled with the at least one fifth upper wave end through the second upper wave transmission waveguide structure.

13. The system of claim 12, wherein the second lower wave end is coupled with the first upper wave end;

the first lower wave end is used for: inputting a service optical signal, and transmitting the service optical signal through the second lower wave end, the first upper wave end and the second upper wave end;

The at least one fifth lower wave end is configured to: a downlink service optical signal is split from the service optical signal through the third downlink end and the fourth downlink end;

the at least one fifth upper wave end is configured to: and combining the uplink service optical signals into the service optical signals through the third uplink end and the fourth uplink end.

14. The system of claim 12, wherein the system further comprises a controller configured to control the controller,

The first adjustable beam splitter is configured to: inputting a first service optical signal through a first lower wave end; outputting the first service optical signal through the second lower wave end; a first downlink service optical signal is split from the first service optical signal through the third downlink end;

The first fixed beam splitter is used for: inputting the first downlink service optical signal through the fourth downlink terminal; outputting the first downlink service optical signal through the at least one fifth downlink terminal;

the second fixed beam splitter is used for: inputting a second uplink service optical signal through the at least one fifth uplink terminal; outputting the second uplink service optical signal through the fourth uplink terminal;

The second adjustable beam splitter is configured to: inputting the second uplink service optical signal through the third uplink terminal, and inputting the second service optical signal through the second uplink terminal; combining the second uplink service optical signals into the second service optical signals; and outputting the second service optical signal after the second uplink service optical signal is combined through the first uplink end.

15. The system of any one of claims 12-14, wherein the optical up-down wave system further comprises an up-down wave optical module; the up-down wave optical module is coupled with the at least one fifth down-wave end and the at least one fifth up-wave end respectively.

16. The system of claim 15, wherein the up-down wave optical module is a coherent optical module.

17. An optical communication device comprising a circuit board and at least one optical up-down wave system according to any one of claims 12-16; the optical up-down wave system is arranged on the circuit board.