WO2024244463A9 - Light splitting device and light splitting system - Google Patents

Abstract

A light splitting device (1) and a light splitting system, relating to the technical field of optical communications. The light splitting device (1) comprises a main housing (10), an input interface (20), a first output interface group (40), and a first light splitter (30); the input interface (20) is connected to the main housing (10), and the input interface (20) is a multi-core interface and comprises X output ends, wherein X is an integer greater than 1; the first output interface group (40) comprises a plurality of first output interfaces; the first output interfaces are connected to the main housing (10), and the first output interfaces and the input interface (20) are located on the same side wall of the main housing (10); the first light splitter (30) is located in the main housing (10), an input end of the first light splitter (30) is connected to a first output end among the X output ends, and a first output end of the first light splitter (30) is connected to the first output interfaces. The light splitting device (1) can multiplex distribution optical fiber cables with other light splitting devices (1), which is beneficial to reducing costs and construction difficulty.

Description

Spectral separation device and spectral separation system

This application claims priority to Chinese patent application No. 202321382138.3 filed on May 31, 2023, and utility model name “Spectrometer and Spectrometer System”, the entire contents of which are incorporated by reference into this application.

Technical Field

The present application relates to the field of optical communication technology, and in particular to a spectrometer and a spectrometer system.

Background Art

The optical distribution network (ODN) provides a physical channel for optical transmission between the optical line terminal (OLT) and the optical network terminal (ONT). In ODN, it is usually necessary to split the optical fibers in the optical cable to cover more users.

In the related art, the optical signal emitted by the OLT passes through the optical distribution frame (ODF), the splitting and splicing closure (SSC), the optical splitting system and the access terminal box (ATB) in sequence before reaching the ONT. The optical splitting system is connected to the SSC through a single-core optical cable and includes at least two optical splitting devices cascaded through the single-core optical cable.

The number of optical splitters that can be connected to a single-core optical cable is limited, and the number of ONTs that can be connected to each optical splitter is also limited. Therefore, in scenarios with high user density, it is necessary to increase the number of distribution segment optical cables (i.e., single-core optical cables between the optical splitter system and the SSC) and the number of optical splitters to meet the number of users. In scenarios with multiple operators, since different operators need to use different distribution segment optical cables, the number of distribution segment optical cables is relatively large. The large number of distribution segment optical cables increases costs and construction difficulty.

Utility Model Content

The present application provides a splitter device and a splitter system, which can reduce the number of optical cables in a wiring segment, thereby reducing costs and reducing construction difficulty.

In the first aspect, the present application provides a splitter device. The splitter device may be an optical cable junction box, a fiber access terminal (FAT), an optical cable splitter box, etc. The splitter device includes: a main housing, an input interface, a first output interface group, and a first splitter. The input interface is connected to the main housing, and the input interface is a multi-core interface and includes X output ends, where X is an integer and greater than 1. The input end of the input interface is used to connect to a multi-core optical cable. For example, the input end of the input interface is connected to a multi-core optical cable through an optical fiber connector. The first output interface group includes a plurality of first output interfaces, and the first output interface is connected to the main housing. The first output interface is used to connect to a home optical cable. The first splitter is located in the main housing, and the input end of the first splitter is connected to the first output end of the X output ends, and the first output end of the first splitter is connected to the first output interface.

In this application, the interface may also be referred to as a fiber optic adapter or a fiber optic connector, etc.

In the present application, the input interface of the optical splitter is a multi-core interface, which can be connected to a multi-core optical cable. For scenarios with high user density, when the number of optical splitters connected to each core of the multi-core optical cable is the same as the number of optical splitters connected to the single-core optical cable in the related art, for a fixed number of users, only a small number of distribution segment optical cables are needed to meet the number of users. For scenarios with multiple operators, different operators can use different optical fibers in the same multi-core optical cable, that is, different operators can share distribution segment optical cables, thereby reducing the number of distribution segment optical cables.

It can be seen that in the above two scenarios, the number of optical cables in the distribution section is reduced, which is conducive to reducing costs and reducing construction difficulty.

In a possible implementation, the optical splitter may include only an output interface (first output interface) for connecting to a home optical cable, but does not include an output interface (second output interface) for connecting to other optical splitters. In this case, the optical splitter is an optical splitter at the end of an optical fiber link. It can be called an end optical splitter.

In this application, the end light splitting device can adopt any of the following five structures:

The first type is that the spectroscopic device includes only the aforementioned first spectrometer and no other spectrometers, and the first spectrometer is an equal-splitting spectrometer.

Optionally, the first optical splitter is a 1:N optical splitter, wherein N is an integer and is greater than 1. N may be equal to an integer power of 2, for example, may be equal to 8, 16 or 32.

The second type is that the optical splitter device includes, in addition to the aforementioned first optical splitter, Y second optical splitters. The first optical splitter and the second optical splitter are both equal-splitting optical splitters. The second optical splitter is located in the main housing.

Optionally, the first optical splitter and the second optical splitter are both 1:N optical splitters.

In the second structure, the optical splitter device also includes Y third output interface groups for connecting to the household optical cable. Each third output interface group includes a plurality of third output interfaces, and the third output interface is connected to the main housing. The input ends of the Y second optical splitters are respectively connected to an output end of the input interface, and the output ends of the Y second optical splitters are respectively connected to a third output interface.

By adding a second optical splitter, more optical signals can be split and provided to the user terminal device through the third output interface connected to the second optical splitter, so that the optical splitting device can serve more users. In addition, each optical splitter (including the first optical splitter and the second optical splitter) can be used by different operators. When the user needs to switch operators, he only needs to switch the output interface connected to the home optical cable, which is convenient.

The third type is that the optical splitting device includes, in addition to the aforementioned first optical splitter, Y first connection interfaces. The Y first connection interfaces are respectively connected to an output end of the input interface. The first connection interface is a single-core interface and is connected to the main housing, and is used to connect to the auxiliary optical splitting unit.

Fourth, in addition to the aforementioned first spectrometer, the spectrometer further includes a second spectrometer and Y first connection interfaces, where Y is an integer and Y is greater than 0. The input end of the second spectrometer is connected to the first output end of the input interface, and the first output end of the second spectrometer is connected to the input end of the first spectrometer, so that the input end of the first spectrometer is connected to the first output end of the input interface through the second spectrometer, and the Y second output ends of the second spectrometer are connected to the Y first connection interfaces. The first connection interface is a single-core interface and is connected to the main housing, and is used to connect to the auxiliary spectrometer unit.

Fifth, the spectrometer includes at least one auxiliary spectrometer unit in addition to the components corresponding to the third structure or the fourth structure.

In the third, fourth and fifth structures, the auxiliary optical splitter unit includes an auxiliary housing, a second connection interface, an extended optical splitter and a third output interface group. The third output interface group includes a plurality of third output interfaces. The second connection interface and the third output interface are both connected to the auxiliary housing. The second connection interface is connected to the first connection interface via an optical fiber. The input end of the extended optical splitter is connected to the output end of the second connection interface, and the third output interface is connected to the output end of the extended optical splitter.

By configuring the first connection interface of the optical splitter device to connect to the auxiliary optical splitter unit, it is possible to choose whether to deploy the auxiliary optical splitter unit and the layout position of the auxiliary optical splitter unit as needed, which is conducive to further reducing the difficulty of construction. After connecting the auxiliary optical splitter unit, the extended optical splitter and the third output interface can serve more users. In addition, each optical splitter (including the first optical splitter and the extended optical splitter) can be used by different operators. When the user needs to switch operators, he only needs to switch the output interface connected to the home optical cable, which is convenient.

In another possible implementation, the optical splitter device includes, in addition to the first output interface for connecting to the drop optical cable, a second output interface for connecting to other optical splitters. The second output interface is a multi-core interface and is connected to the main housing. The second output interface is connected to at least part of the output end of the input interface.

In an optical fiber link, such an optical splitter device may be an optical splitter device other than the optical splitter device closest to the user side among a plurality of cascaded optical splitters, and may also be used as the optical splitter device closest to the user side.

Optionally, the optical splitting device including both the first output interface and the second output interface may adopt any one of the following five structures:

The first type, the second output interface includes X-1 first input terminals and 1 second input terminal, the other output terminals among the X output terminals except the first output terminal are respectively connected to the X-1 first input terminals, and the second input terminal is vacant.

Optionally, the arrangement of the terminals in the input interface and the second output interface is the same, and the position of the first output terminal in the input interface is different from the position of the second input terminal in the second output interface. In this way, multiple optical splitters in the optical splitting system can adopt the same structure, which is conducive to the normalization of the optical splitters and reduces the difficulty of construction.

The second type, in addition to the main housing, the input interface, the first optical splitter and the first output interface, the optical splitter device further includes: Y second optical splitters and Y third output interface groups, wherein Y is an integer, Y is greater than 0 and Y is less than or equal to X-1. The third output interface group includes a plurality of third output interfaces, and the third output interface is connected to the main housing. The input ends of the Y second optical splitters are respectively connected to one of the X output ends, the first output ends of the Y second optical splitters are respectively connected to the Y third output interface groups, and the second output ends of the Y second optical splitters and the second output end of the first optical splitter are both connected to the second output interface.

Here, the first beam splitter and the Y second beam splitters are all unequal ratio beam splitters. The number of output ends of the first beam splitter and the number of output ends of the second beam splitter may be the same or different. When the number of output ends of the first beam splitter and the number of output ends of the second beam splitter are the same, the splitting ratio of the first beam splitter and the splitting ratio of the second beam splitter may be the same.

The third type, in addition to the main housing, the input interface, the first spectrometer and the first output interface group, the spectrometer device also includes Y second spectrometers and Y first connection interfaces. Wherein, Y is an integer, Y is greater than 0 and Y is less than or equal to X-1. The first spectrometer and the Y second spectrometers are unequal-ratio spectrometers. The input ends of the Y second spectrometers are respectively connected to one of the X output ends, the first output ends of the Y second spectrometers are respectively connected to one of the Y first connection interfaces, and the second output ends of the Y second spectrometers and the second output ends of the first spectrometer are both connected to the second output interface. The first connection interface is a single-core interface and is connected to the main housing, and is used to be connected to the auxiliary spectrometer unit.

Here, the first optical splitter and the Y second optical splitters are all unequal-ratio optical splitters. The number of output ends of the first optical splitter and the number of output ends of the second optical splitter may be different.

Fourth, in addition to the main housing, the input interface, the first optical splitter and the first output interface group, the optical splitter device also includes a second optical splitter and Y first connection interfaces, wherein Y is an integer and Y is greater than 0. The input end of the second optical splitter is connected to the first output end of the input interface, and the first output end of the second optical splitter is connected to the input end of the first optical splitter, so that the input end of the first optical splitter is connected to the first output end of the input interface through the second optical splitter, and the Y second output ends of the second optical splitter are connected to the Y first connection interfaces. The first connection interface is a single-core interface and is connected to the main housing, and is used to be connected to the auxiliary optical splitter unit.

Exemplarily, the first beam splitter and the expansion beam splitter are both equal-ratio beam splitters, and the number of output ends of the first beam splitter is equal to the number of output ends of the expansion beam splitter. In this case, the second beam splitter is an equal-ratio beam splitter of 1:(Y+1).

Fifth, the optical splitting device includes at least one auxiliary optical splitting unit in addition to the components in the third structure or the fourth structure. The structure and function of the auxiliary optical splitting unit are the same as those of the aforementioned auxiliary optical splitting unit, and will not be described in detail here.

In a possible implementation, all interfaces connected to the main housing are located on the same side wall of the main housing.

In another possible implementation, all interfaces connected to the main housing are located on different side walls of the main housing, for example, the input interface and the output interface are located on opposite side walls of the main housing.

In a second aspect, the present application provides a light splitting system, which includes M cascaded light splitting devices, and two adjacent light splitting devices are connected via a multi-core optical cable.

In a first possible implementation, the M optical splitters include M-1 first optical splitters and 1 second optical splitter. The first optical splitter is an optical splitter having the first structure and the first and second output interfaces, and the second optical splitter is an end optical splitter having the first structure.

In this embodiment, different cores of the multi-core optical cable correspond to different optical splitting devices, and an optical splitter in each optical splitting device is an equal-splitting optical splitter.

In a second possible implementation manner, the M optical splitting devices are all optical splitting devices having the aforementioned first structure and having first and second output interfaces.

In the first and second possible implementations, M is an integer, M is greater than 2 and M is less than or equal to X.

In the first and second possible implementations, for the optical signal in each core of the multi-core optical cable, it is only split by a first optical splitter and then transmitted to the user terminal device. Compared with the method of splitting the optical signal in a single core by cascading an unequal-score optical splitter and an equal-score optical splitter, the loss can be reduced.

In a third possible implementation, the M optical splitters include M-1 first optical splitters and 1 second optical splitter. The first optical splitter is an optical splitter having the aforementioned second structure and having first and second output interfaces. The second optical splitter is the aforementioned terminal optical splitter having the second structure.

In a fourth possible implementation, the M optical splitters include M-1 first optical splitters and 1 second optical splitter. The first optical splitter is an optical splitter having the third or fourth structure and having first and second output interfaces. The second optical splitter is the terminal optical splitter having the third or fourth structure.

In the third and fourth possible implementations, M is an integer and M is greater than 1. The value of M is related to the energy of the optical signal in a single core of the multi-core optical cable, but has nothing to do with the number of cores of the multi-core optical cable, so M can be greater than, equal to, or less than X.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of an ODN provided in an embodiment of the present application;

FIG2 is a schematic diagram of the structure of a light splitting system provided in an embodiment of the present application;

FIG3 is a schematic structural diagram of a light splitting device in FIG2 ;

FIG4 is a schematic diagram of a three-dimensional exploded structure of a main housing provided in an embodiment of the present application;

FIG5 is a schematic structural diagram of another light splitting device in FIG2 ;

FIG6 is a schematic diagram of the structure of another light splitting system provided in an embodiment of the present application;

FIG7 is a schematic diagram of the structure of another light splitting system provided in an embodiment of the present application;

FIG8 is a schematic structural diagram of a light splitting device in FIG7 ;

FIG9 is a schematic diagram of the structure of another light splitting system provided in an embodiment of the present application;

FIG10 is a schematic structural diagram of a light splitting device in FIG9 ;

FIG11 is a schematic structural diagram of another light splitting device in FIG10;

FIG12 is a schematic diagram of the structure of another optical splitting system provided in an embodiment of the present application;

FIG13 is a schematic structural diagram of a light splitting device in FIG12;

FIG. 14 is a schematic structural diagram of another spectroscopic device in FIG. 12 .

DETAILED DESCRIPTION

Fig. 1 is a schematic diagram of the structure of an ODN provided in an embodiment of the present application. As shown in Fig. 1, the ODN includes an ODF, an SSC, a hub box, a splitter system and an ATB which are sequentially connected between the OLT and the ONT.

In the embodiment of the present application, the optical splitting system includes M cascaded optical splitting devices. The input interface of the first optical splitting device in the optical splitting system is connected to the SSC via a multi-core optical cable, and each optical splitting device is also connected via a multi-core optical cable. Therefore, in the embodiment of the present application, the input interface of each optical splitting device is a multi-core interface.

The number of cores of the multi-core optical cable can be selected according to actual needs, and the number of terminals in the input interface of the splitter is the same as the number of cores of the multi-core optical cable. Exemplarily, the value range of the number of cores of the multi-core optical cable is 2 to 8. Correspondingly, the value range of the number X of terminals in the input interface of the splitter is also 2 to 8. For example, the number of cores of the multi-core optical cable is 3, and X is also 3. Alternatively, the number of cores of the multi-core optical cable is 4, and X is also 4. Alternatively, the number of cores of the multi-core optical cable is 6, and X is also 6. Alternatively, the number of cores of the multi-core optical cable is 8, and X is also 8.

Among them, the section of optical cable before the splitter system (i.e., the input optical cable of the first splitter device of the splitter system, such as the optical cable between the junction box and the first splitter device of the splitter system) and the optical cables between the splitter devices of the splitter system are usually laid by the operator and can be called distribution segment optical cables. The optical cable between the splitter system and ATB and the optical cable between ATB and ONT are also set up by the operator and are usually called home optical cables.

In an embodiment of the present application, the input interface of the optical splitter is a multi-core interface, and the multi-core interface is connected to a multi-core optical cable. For scenarios with high user density, when the number of optical splitters connected to each core of the multi-core optical cable is the same as the number of optical splitters connected to the single-core optical cable in the related art, for a fixed number of users, only a small number of distribution segment optical cables are needed to meet the number of users. For scenarios with multiple operators, different operators can use different optical fibers in the same multi-core optical cable, that is, different operators can share distribution segment optical cables, thereby reducing the number of distribution segment optical cables. It can be seen that in the above two scenarios, the number of distribution segment optical cables is reduced, which is conducive to reducing costs and reducing construction difficulty.

Optionally, the optical splitting device may be an optical cable joint box, a FAT or an optical cable fiber splitter box, etc.

It should be noted that the ODN shown in FIG. 1 may include more or fewer devices, and the number and types of devices may be selected according to actual needs, as long as the optical splitting system is included, and the embodiments of the present disclosure do not limit this.

The structure of the optical splitting device and the optical splitting system with a multi-core interface is described in detail below.

FIG2 is a schematic diagram of the structure of a splitter system provided in an embodiment of the present application. As shown in FIG2, the splitter system includes M cascaded splitter devices 1. The M splitter devices 1 all adopt an equal splitter structure. Each splitter device 1 is used to split the optical signal in one core of a multi-core optical cable (i.e., a distribution segment optical cable) to which the splitter system is connected.

It should be noted that FIG. 2 takes M equal to 4 as an example. In other embodiments, the number of M can be set according to actual needs as long as it does not exceed the number of cores of the multi-core optical cable connected to the splitter device.

Fig. 3 is a schematic diagram of the structure of a spectrometer in Fig. 2. As shown in Fig. 3, the spectrometer 1 includes: a main housing 10, an input interface 20, a first spectrometer 30 and a first output interface group 40. The input interface 20 is connected to the main housing 10, and the input interface 20 is a multi-core interface and includes X output terminals, where X is an integer and greater than 1. The first output interface group 40 includes a plurality of first output interfaces (not shown), and the first output interface is connected to the main housing 10. The first spectrometer 30 is located in the main housing 10, and the input terminal of the first spectrometer 30 is connected to the first output terminal among the X output terminals, and the first output terminal of the first spectrometer 30 is connected to the first output interface.

In the embodiment of the present application, the first optical splitter 30 may be an equal-splitting optical splitter. The first optical splitter 30 has one input end and N output ends, and may be referred to as a 1:N optical splitter. Wherein, N is an integer and is greater than 1. N may be equal to an integer power of 2, for example, may be equal to 4, 8, 16, or 32, etc.

Exemplarily, the input end of the first optical splitter 30 and the input interface 20 may be connected by optical fiber fusion splicing, and the output end of the first optical splitter 30 and the first output interface 40 may be connected by optical fiber fusion splicing.

In an embodiment of the present application, the input end of the input interface 20 is located outside the main housing 10, and is used to connect to a multi-core optical cable. In some examples, a fiber optic connector is provided at one end of the multi-core optical cable, and the fiber optic connector is inserted into the input interface to connect the input end of the input interface to the multi-core optical cable. This method of plugging the fiber optic connector into the input interface is easy to operate and easy to implement, which is conducive to improving the networking efficiency of the ODN. The present application does not limit the structure of the fiber optic connector, as long as all the cores in the multi-core optical cable can be connected one by one to each terminal in the input interface. The output end of the input interface 20 is located inside the main housing 10, and is connected to at least the first optical splitter 30.

In the embodiment of the present application, the first output interface 40 is used to connect to the household optical cable, and can be referred to as the household interface. Usually, the household interface is a single-core interface, the household optical cable is a single-core optical cable, and each household interface is connected to a user terminal device through a single-core optical cable. User terminal devices include the aforementioned ATB and ONT. The number of the first output interfaces 40 in the optical splitting device is usually equal to the number of output ends of the first optical splitter 30, that is, equal to N.

The optical splitter in FIG3 is the last optical splitter among the M optical splitters cascaded in FIG2 , i.e., the optical splitter at the end position in an optical fiber link (which can be referred to as the end optical splitter). Therefore, there is no need to set a second output interface for connecting to the next optical splitter.

In the embodiment of the present application, all interfaces of the light splitting device are located on the same side wall of the main housing 10 .

In a possible implementation, each interface of the light splitting device is fixedly connected to the side wall of the main housing 10, and the connection method includes but is not limited to snap-on, bonding, etc. The side wall of the main housing 10 has a light inlet and at least one light outlet, the input interface 20 is connected to the light inlet, and the first output interface is connected to the corresponding light outlet. The light inlet and the light outlet are arranged on the same side wall of the main housing 10, that is, the input interface 20 and each first output interface in the first output interface group 40 are located on the same side wall of the main housing 10.

It should be noted that, for the convenience of drawing, the input interface 20 and the first output interface group 40 in Figure 3 are located on two opposite side walls of the main shell 10, while in actual applications, the input interface 20 and each first output interface in the first output interface group 40 are located on the same side wall of the main shell 10, so as to facilitate connecting each interface (including the input interface and the output interface) with the optical cable.

Optionally, the input interface 20 also includes a sealing structure, such as a sealing ring, which is located between the input interface 20 and the side wall of the main shell 10 to prevent dust, water stains and other debris from entering the accommodating cavity and causing dust accumulation in the accommodating cavity, damage to components in the accommodating cavity, and other problems.

FIG4 is a schematic diagram of a three-dimensional disassembly of a main housing provided in an embodiment of the present application. As shown in FIG4, in another possible embodiment, the input interface 20 and the first output interface are integrally formed with a side wall of the main housing 10. In this embodiment, the main housing 10 may include a body 111 and an adapter panel 112. The input interface 20 and the first output interface (not shown in the figure) are integrally formed with the adapter panel 112. Here, "integrated molding" means forming an integral structure by injection molding or stamping, and no additional connection method is required to connect two or more components. The body 111 and the adapter panel 112 define a accommodating cavity to accommodate devices such as the first spectrometer 30. The body 111 and the adapter panel 112 can be detachably connected. The present application does not limit the detachable connection method, including but not limited to snap-on, bonding, etc. For example, in FIG4, the body 111 and the adapter panel 112 are snap-on by a first snap-on structure 1111 on the body 111 and a second snap-on structure 1122 on the adapter panel 112.

Optionally, the main housing 10 further includes a second sealing ring 140 disposed between the main body 111 and the adapter panel 112. Exemplarily, as shown in FIG4 , the second sealing ring 140 may be disposed around the outer ring of the adapter panel 112. When the main body 111 is connected to the adapter panel 112, the second sealing ring 140 is sealed at the connection between the main body 111 and the adapter panel 112, so that the accommodation cavity formed by the adapter panel 112 and the main body 111 becomes a closed cavity, preventing dust, water stains and other debris from entering the accommodation cavity, causing dust accumulation in the accommodation cavity, damage to components in the accommodation cavity, and other problems.

The embodiment of the present application does not limit the shape of the main shell 10, for example, it can be a rectangular parallelepiped, a cylinder, a frustum, or an irregular shape, etc., which can be selected according to actual needs.

FIG5 is a schematic diagram of the structure of another spectrometer in FIG2. The difference between the spectrometer in FIG5 and the spectrometer in FIG3 is that the spectrometer in FIG5 further includes a second output interface 50, and the second output interface 50 is used to connect to another spectrometer. The second output interface 50 is a multi-core interface and is connected to the main housing 10. Optionally, the second output interface 50, the input interface 20 and the first output interface are located on the same side wall of the main housing 10.

Assume that the second output interface 50 includes X input terminals. The X input terminals include X-1 first input terminals and 1 second input terminal. Among the X output terminals of the input interface 20, the other output terminals except the first output terminal are respectively connected to the X-1 first input terminals of the second output interface 50, and the second input terminal of the second output interface 50 is vacant.

Optionally, the X input ends of the input interface 20 of the optical splitter device may all receive optical signals or partially receive optical signals. When there are X-i input ends (i is an integer, and i is greater than or equal to 0) in the input interface 20 of the optical splitter device that receive optical signals, one optical signal is output to the input end of the first optical splitter 30 through the first output interface 20a of the input interface 20, and the remaining X-i-1 optical signals are output to the X-i-1 first input ends of the second output interface 50 through the second output end of the input interface 20, and are output from the output end of the second output interface 50. In this way, the optical splitter device can provide X-i-1 optical signals to the next optical splitter device.

When the number of optical splitters included in the optical splitter system is equal to the number of cores in the multi-core optical cable, i can indicate the position of the optical splitter in the M optical splitters included in the optical splitter system. For the jth optical splitter in the cascade order, i is equal to j-1.

For example, in FIG2 , for the first optical splitter, i is equal to 0, and the X input ends of the input interface 20 of the first optical splitter all receive optical signals. Among them, one optical signal is output to the input end of the first optical splitter 30 through the first output interface 20a of the input interface 20, and the remaining X-1 optical signals are output to the X-1 first input ends of the second output interface 50 through the second output end of the input interface 20. In this way, the first optical splitter can provide X-1 optical signals to the next optical splitter.

In this way, each optical splitting device is used to split a received optical signal, and transmit the split optical signal to the user terminal device through the first output end of the input interface 20, the first optical splitter 30, the first output interface 40 and the home optical cable.

In the optical splitting system shown in FIG2 , for the optical signal in each core of the multi-core optical cable, it is only split by a first optical splitter and then transmitted to the user terminal device. Compared with the method of splitting the optical signal in a single core by cascading an unequal-score optical splitter and an equal-score optical splitter, the loss can be reduced.

In addition, in the optical splitting system, the first M-1 optical splitting devices also provide optical signals to the next optical splitting device through the second output interface. In order to ensure that each optical splitting device can transmit one of the at least one optical signals received to the first output interface, it is necessary to connect the output end of the output optical signal of the second output interface of the preceding optical splitting device to the input end corresponding to the first output end of the input interface of the succeeding optical splitting device.

Optionally, the position of the terminal corresponding to the first output end of the input interface 20 is fixed in the input interface 20, that is, for all optical splitting devices, the position of the terminal corresponding to the first output end of the input interface 20 is the same in the input interface 20. The position of the terminal corresponding to the second input end of the second output interface 50 is fixed in the second output interface 50, that is, for all optical splitting devices, the position of the terminal corresponding to the second input end of the second output interface 50 is the same in the second output interface 50. In this way, it is conducive to the normalization of the optical splitting device and reduces the difficulty of construction.

Fig. 6 is a schematic diagram of the structure of another optical splitting system provided in an embodiment of the present application. The difference from the optical splitting system shown in Fig. 2 is that in Fig. 6, all the optical splitting devices are the optical splitting devices in Fig. 5, and the optical splitting device in Fig. 3 is not included.

In addition, in FIG6 , the arrangement of the terminals in the input interface 20 and the second output interface 50 is the same. For example, the X terminals in the output interface 20 are arranged in a straight line along a set direction, and correspondingly, the X terminals in the second output interface 50 are also arranged in a straight line along the set direction (for example, the X terminals in the output interface 20 and the X terminals in the second output interface 50 are arranged in a vertical direction or a horizontal direction). For another example, the X terminals in the output interface 20 are arranged in a two-dimensional array, and correspondingly, the X terminals in the second output interface 50 are also arranged in a two-dimensional array (for example, the X terminals in the output interface 20 and the X terminals in the second output interface 50 are arranged in 2 rows and 2 columns).

In order to facilitate the connection of the output end of the output optical signal of the second output interface 50 of the front spectrometer device with the input end corresponding to the first output end in the input interface 20 of the rear spectrometer device, the position of the terminal corresponding to the first output end of the input interface 20 in the input interface 20 is different from the position of the terminal corresponding to the second input end of the second output interface 50 in the second output interface 50.

For example, the input interface includes four output terminals arranged in a vertical direction. The second output interface includes four input terminals arranged in a vertical direction. The four output terminals of the input interface and the four input terminals of the second output interface are numbered from top to bottom. The first output terminal may be output terminal 4 in the input interface 20, and the second input terminal may be input terminal 1 in the second output interface 50.

The other output terminals except the first output terminal in the input interface 20 can be shifted downward by one position and connected to the first output terminal of the second output interface. For example, the input terminal 1 in the input interface 20 is connected to the output terminal 2 in the second output interface 50; the input terminal 2 in the input interface 20 is connected to the output terminal 3 in the second output interface 50; and so on.

In this way, it can be ensured that the connection mode between the input interface 20 and the second output interface 50 inside each optical splitting device is the same, thereby achieving normalization of the optical splitting devices.

In this embodiment, all the optical splitters in the optical splitting system have the same structure, thus achieving normalization of the optical splitters. When ODN networking is performed, there is no need to distinguish between optical splitters with different structures, which reduces the difficulty of construction and helps improve networking efficiency.

Fig. 7 is a schematic diagram of the structure of another optical splitting system provided in an embodiment of the present application. As shown in Fig. 7, the optical splitting system includes M cascaded optical splitting devices 1. Each optical splitting device 1 is used to split the optical signal in one core of the multi-core optical cable (i.e., the distribution segment optical cable) connected to the optical splitting system.

It should be noted that FIG. 7 takes M equal to 4 as an example. In other embodiments, the number of M can be set according to actual needs as long as it does not exceed the number of cores of the multi-core optical cable connected to the splitting device.

Fig. 8 is a schematic diagram of the structure of a spectrometer in Fig. 7. The difference from the spectrometer in Fig. 2 is that the spectrometer 1 in Fig. 8 further includes a second spectrometer 60 and Y first connection interfaces 81, where Y is an integer and Y is greater than zero.

The input end of the second optical splitter 60 is connected to the first output end of the input interface 20, and the first output end of the second optical splitter 60 is connected to the input end of the first optical splitter 30, so that the input end of the first optical splitter 30 is connected to the first output end of the input interface 20 through the second optical splitter 60, and the Y second output ends of the second optical splitter 60 are connected to the Y first connection interfaces 1. The first connection interface 81 is a single-core interface and is connected to the main housing 10.

FIG8 illustrates an example in which Y is equal to 1. In other embodiments, Y may also be greater than 1.

Optionally, the optical splitter device shown in FIG8 may further include an auxiliary housing 10a, a second connection interface 82, an extended optical splitter 90, and a third output interface group 70. The second connection interface 82 and the third output interface in the third output interface group 70 are both connected to the auxiliary housing 10a. The input end of a second connection interface 82 is connected to the output end of a first connection interface 81 through a single-core optical cable. The input end of the extended optical splitter 90 is connected to the output end of the second connection interface 82, and the output end of the extended optical splitter 90 is connected to the third output interface.

Here, the expansion optical splitter 90 may be an equal-score optical splitter, and the number of output ends of the expansion optical splitter 90 is the same as the number of output ends of the first optical splitter 30 .

The third output interface is used to connect to the home optical cable and can be called a home interface. The number of the third output interfaces is the same as the number of output ends of the extension optical splitter 90. When the number of output ends of the extension optical splitter 90 is the same as the number of output ends of the first optical splitter 30, the structure of the third output interface can be the same as that of the first output interface.

In the embodiment of the present application, the main shell 10 and its various connected interfaces and the internal structure of the main shell 10 can be collectively referred to as the main splitting unit; the auxiliary shell 10a and its various connected interfaces and the internal structure of the auxiliary shell 10a can be collectively referred to as the auxiliary splitting unit.

The auxiliary splitter unit is an optional structure and can be set up according to actual needs. For example, if the user density is large, one or more auxiliary splitter units can be set up to provide connections for more users. For another example, if there are multiple operators, auxiliary splitter units can be set up for operators different from the operator to which the main splitter unit belongs, and different auxiliary splitter units can be used by different operators. In this way, when the end user needs to switch to a different operator, it is only necessary to connect the home optical cable from one splitter unit to another splitter unit.

In practical applications, the main optical splitter unit and the auxiliary optical splitter unit can be set close to the user terminal equipment they serve. The distance between the main optical splitter unit and the auxiliary optical splitter unit is determined by the distance between the user terminal equipment they serve, and the distance between the main optical splitter unit and the auxiliary optical splitter unit can be several meters, tens of meters, or even hundreds of meters. Alternatively, the main optical splitter unit and the auxiliary optical splitter unit can also be arranged on the same pole.

Optionally, the second beam splitter 60 is an equal-ratio beam splitter of 1:(Y+1).

In the embodiment shown in Fig. 7, the structures of the various light splitting devices 1 are the same, which are all the structures shown in Fig. 8. In other embodiments, the last light splitting device 1 may be based on the structure shown in Fig. 8, but without the second output port 50.

FIG9 is a schematic diagram of the structure of another optical splitting system provided in an embodiment of the present application. As shown in FIG9 , the optical splitting system includes M cascaded optical splitting devices 1. The M optical splitting devices 1 all adopt an unequal splitting structure. Each optical splitting device 1 is used to split the optical signals in all cores of the multi-core optical cable (i.e., the distribution segment optical cable) to which the optical splitting system is connected.

FIG9 illustrates an example in which M is equal to 3. In practical applications, the value of M can be set according to actual needs and has no necessary correlation with the number of cores of the multi-core optical cable connected to the optical splitter. M can be greater than, equal to, or less than the number of cores of the multi-core optical cable.

FIG10 is a schematic diagram of the structure of a spectrometer in FIG9 . The difference from the spectrometer shown in FIG2 is that the spectrometer 1 shown in FIG10 further includes Y second spectrometers 60 and Y third output interface groups 70. Each third output interface group 70 includes a plurality of third output interfaces, and the third output interfaces are connected to the main housing 10.

The Y second optical splitters 60 are all equal-splitting optical splitters. The input ends of the Y second optical splitters 60 are respectively connected to an output end of the input interface 20, that is, the input end of each second optical splitter 60 is connected to an output end of the input interface 20, and the output end of the output interface 20 to which the input end of the second optical splitter 60 is connected is different from the output end of the output interface 20 to which the input end of the first optical splitter 30 is connected. The output ends of the Y second optical splitters 60 are respectively connected to a third output interface group 70, and the third output interfaces connected to the multiple output ends of each second optical splitter 60 belong to the same output interface group 70.

Wherein, Y is an integer, Y is greater than 0 and Y is less than or equal to X-1. When all X output ends of the input interface 20 output optical signals, an optical splitter may be provided for each output end, in which case Y is equal to X-1. When a part of the output ends of the input interface 20 output optical signals and another part of the output ends of the input interface 20 do not output optical signals, an optical splitter may be provided only for the output ends that output optical signals, in which case Y is less than X-1.

In this embodiment, the number of output ends of the second beam splitter 60 is the same as the number of output ends of the first beam splitter 30. In other embodiments, the number of output ends of the second beam splitter may be different from the number of output ends of the first beam splitter.

The third output interface is used to connect to the home optical cable and can be called a home interface. The number of the third output interfaces is the same as the number of output ends of the second optical splitter 60. When the number of output ends of the second optical splitter 60 is the same as the number of output ends of the first optical splitter 30, the structure of the third output interface can be the same as that of the first output interface.

The optical splitter device in FIG. 10 is the last optical splitter device in the optical splitter system shown in FIG. 9 , and therefore, there is no need to provide a second output interface for connecting to the next optical splitter device.

FIG11 is a schematic structural diagram of another optical splitter in FIG9 . The difference from the optical splitter in FIG10 is that the first optical splitter 30 and the second optical splitter 60 in FIG11 are both unequal-splitting optical splitters, and the optical splitter 1 further includes a second output interface 50 .

In FIG11 , the second optical splitter 60 has one input end and N+1 output ends. The N output ends are first output ends, and the 1 output end is a second output end. N is an integer and is greater than 1. N can be equal to an integer power of 2, for example, 4, 8, 16, or 32.

The input ends of the Y second optical splitters 60 are respectively connected to one of the X output ends, the first output end of each second optical splitter 60 is respectively connected to a third output interface, the second output ends of the Y second optical splitters 60 and the second output end of the first optical splitter 30 are both connected to the second output interface 50, and provide one optical signal to the second output interface 50. The second output interface 50 is connected to the main housing 10.

The output optical powers of the first output ends of the second optical splitter 60 are equal, and the optical power outputted by the second output end of the second optical splitter 60 is greater than the sum of the optical powers outputted by all the first output ends of the second optical splitter 60. Exemplarily, the ratio of the optical power outputted by the second output end of the second optical splitter 60 to the sum of the optical powers outputted by all the first output ends of the second optical splitter 60 can be set as required, for example, it can be 90:10, 85:15, 80:20, 75:25 or 70:30, etc.

The distribution of the output optical power of each output end of the first optical splitter 30 is the same as that of the second optical splitter 60 .

In some examples, the second optical splitter 60 may be a single optical splitter. In other examples, the second optical splitter 60 includes two cascaded optical splitters, one of which is a 1:2 unequal-ratio optical splitter, and the other is a 1:N equal-ratio optical splitter, one output end of the 1:2 unequal-ratio optical splitter is the second output end of the second optical splitter 60, the other output end of the 1:2 unequal-ratio optical splitter is connected to the input end of the 1:N equal-ratio optical splitter, and the N output ends of the 1:N equal-ratio optical splitter are the first output end of the second optical splitter 60.

In the optical splitter device shown in FIG. 10 and FIG. 11 , the optical splitters (the first optical splitter 30 and the second optical splitter 60) in the main housing 10 can be used by different operators. For example, the first optical splitter 30 is used by one operator, and the second optical splitter 60 is used by another operator. When the end user needs to switch to a different operator, it is only necessary to connect the output interface connected to one optical splitter of the drop optical cable to the output interface connected to another optical splitter.

FIG12 is a schematic diagram of the structure of another optical splitting system provided in an embodiment of the present application. As shown in FIG12 , the optical splitting system includes M cascaded optical splitting devices 1. The M optical splitting devices 1 all adopt an unequal splitting structure. Each optical splitting device 1 is used to split the optical signals in all cores of the multi-core optical cable (i.e., the distribution segment optical cable) to which the optical splitting system is connected.

FIG12 illustrates an example in which M is equal to 3. In practical applications, the value of M can be set according to actual needs and has no necessary correlation with the number of cores of the multi-core optical cable connected to the optical splitter. M can be greater than, equal to, or less than the number of cores of the multi-core optical cable.

Fig. 13 is a schematic diagram of the structure of a spectrometer in Fig. 12. As shown in Fig. 13, the spectrometer 1 further includes M first connection interfaces 81. Wherein, M is an integer, M is greater than 0 and M is less than or equal to X-1.

The M first connection interfaces 81 are respectively connected to one output end of the input interface 20 . The first connection interface 81 is a single-core interface and is connected to the main housing 10 .

Fig. 14 is a schematic diagram of the structure of another optical splitter in Fig. 12. The difference from the optical splitter shown in Fig. 13 is that in Fig. 14, the optical splitter further includes Y second optical splitters 60 and a second output interface 50. Wherein, Y is an integer, Y is greater than 0 and Y is less than or equal to X-1.

The structure of the first optical splitter 30 refers to the relevant description of the embodiment shown in FIG. 11 , which will not be described in detail here.

The input ends of the Y second optical splitters 60 are respectively connected to one of the X output ends, the first output ends of the Y second optical splitters 60 are respectively connected to a first connection interface 81, and the second output ends of the Y second optical splitters 60 and the second output end of the first optical splitter 30 are both connected to the second output interface 50. The second output interface 50 is connected to the main housing 10.

Exemplarily, the Y second beam splitters 60 are unequal-ratio beam splitters. For example, they can be unequal-ratio beam splitters of 1:2. The second beam splitter 60 has a first output end and a second output end. The ratio of the output optical power of the first output end of the second beam splitter 60 to the output optical power of the second output end of the second beam splitter 60 can be set as needed, for example, it can be 90:10, 85:15, 80:20, 75:25 or 70:30, etc. When implemented, the ratio of the output optical power of the first output end of the second beam splitter 60 to the output optical power of the second output end of the second beam splitter 60 can be equal to the ratio of the optical power output from the second output end of the first beam splitter 30 to the sum of the optical powers output from all the first output ends of the first beam splitter 30.

Optionally, the light splitting device shown in FIG. 13 and FIG. 14 may further include the aforementioned auxiliary light splitting unit.

Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The words "first", "second", "third" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not indicate a quantity limitation, but indicate the existence of at least one.

The above description is only an embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the present application shall be included in the protection scope of the present application.

Claims (18)

A spectrometer, characterized in that the spectrometer comprises: a main housing, an input interface, a first output interface group and a first spectrometer, The input interface is connected to the main housing, the input interface is a multi-core interface and includes X output terminals, where X is an integer and is greater than 1; The first output interface group includes a plurality of first output interfaces, the first output interfaces are connected to the main housing, and are located on the same side wall of the main housing as the input interface; The first optical splitter is located in the main housing, the input end of the first optical splitter is connected to the first output end among the X output ends, and the first output end of the first optical splitter is connected to the first output interface. The spectrometer according to claim 1, characterized in that the spectrometer further comprises a second output interface for connecting to another spectrometer, the second output interface is a multi-core interface and is connected to the main housing, and the second output interface and the input interface are located on the same side wall of the main housing; The second output interface is connected to at least part of the output ends of the input interface. The optical splitting device according to claim 2, wherein the second output interface comprises X-1 first input ports and 1 second input port, The other output ends of the X output ends except the first output end are respectively connected to the X-1 first input ends, and the second input end is vacant. The spectrometer according to claim 3 is characterized in that the arrangement of terminals in the input interface and the second output interface is the same, and the position of the first output end in the input interface is different from the position of the second input end in the second output interface. The optical splitter device according to claim 3 or 4, characterized in that the optical splitter device further comprises a second optical splitter and Y first connection interfaces, wherein Y is an integer and Y is greater than 0; The input end of the second optical splitter is connected to the first output end of the input interface, and the first output end of the second optical splitter is connected to the input end of the first optical splitter, so that the input end of the first optical splitter is connected to the first output end of the input interface through the second optical splitter, and the Y second output ends of the second optical splitter are connected to the Y first connection interfaces; The first connection interface is a single-core interface and is connected to the main housing. The optical splitter device according to claim 2, characterized in that the optical splitter device further comprises: Y second optical splitters and Y third output interface groups, wherein Y is an integer, Y is greater than 0 and Y is less than or equal to X-1; The input ends of the Y second optical splitters are respectively connected to one of the X output ends, the first output ends of the Y second optical splitters are respectively connected to one of the Y third output interface groups, and the second output ends of the Y second optical splitters and the second output end of the first optical splitter are both connected to the second output interface, so that the second output interface is connected to part of the output ends of the input interface through the Y second optical splitters; The third output interface group is connected to the main shell. The optical splitter device according to claim 2, characterized in that the optical splitter device further comprises Y second optical splitters and Y first connection interfaces, wherein Y is an integer, Y is greater than 0 and Y is less than or equal to X-1; The input ends of the Y second optical splitters are respectively connected to one of the X output ends, the first output ends of the Y second optical splitters are respectively connected to one of the Y first connection interfaces, and the second output ends of the Y second optical splitters and the second output end of the first optical splitter are both connected to the second output interface, so that the second output interface is connected to the output end of the input interface through the Y second optical splitters; The first connection interface is a single-core interface and is connected to the main housing. The optical splitter device according to claim 1, characterized in that the optical splitter device further comprises Y first connection interfaces, wherein Y is an integer, Y is greater than 0 and Y is less than or equal to X-1; The Y first connection interfaces are respectively connected to an output end of the input interface, and the first connection interface is a single-core interface and is connected to the main shell. The optical splitter device according to claim 1, characterized in that the optical splitter device further comprises a second optical splitter and Y first connection interfaces, wherein Y is an integer and Y is greater than 0; The input end of the second optical splitter is connected to the first output end of the input interface, and the first output end of the second optical splitter is connected to the input end of the first optical splitter, so that the input end of the first optical splitter is connected to the first output end of the input interface through the second optical splitter, and the Y second output ends of the second optical splitter are connected to the Y first connection interfaces; The first connection interface is a single-core interface and is connected to the main housing. The optical splitter device according to claim 1, characterized in that the optical splitter device further comprises: Y second optical splitters and Y third output interface groups, wherein Y is an integer, Y is greater than 0 and Y is less than or equal to X-1; The input ends of the Y second optical splitters are respectively connected to one of the X output ends, and the output ends of the Y second optical splitters are respectively connected to one of the Y third output interface groups; The third output interface group is connected to the main shell. The optical splitter device according to claim 5 and any one of claims 7 to 9, characterized in that the optical splitter device further comprises: an auxiliary housing, a second connection interface, an extended optical splitter and a third output interface group; The second connection interface is connected to the auxiliary housing, and the second connection interface is connected to the first connection interface via an optical fiber; The input end of the extended optical splitter is connected to the output end of the second connection interface; The third output interface group includes a plurality of third output interfaces, the third output interfaces are connected to the auxiliary housing, and the third output interfaces are connected to the output end of the extended optical splitter. The spectroscopic device according to any one of claims 1 to 5 and claims 8 to 10, characterized in that the first spectrometer is an equal-score spectrometer. The spectroscopic device according to claim 6 or 7, characterized in that the first spectrometer and the second spectrometer are unequal-score spectrometers. The spectroscopic device according to claim 9 or 10, characterized in that the second spectrometer is an equal-splitting spectrometer. The spectroscopic device according to any one of claims 1 to 12, characterized in that the value range of X is 2 to 8. A light splitting system, characterized in that the light splitting system comprises M cascaded light splitting devices; two adjacent light splitting devices are connected by a multi-core optical cable; The M optical splitting devices include M-1 first optical splitting devices and 1 second optical splitting device. The first spectroscopic device is the spectroscopic device according to any one of claims 3 to 5, and the second spectroscopic device is the spectroscopic device according to claim 1 and any one of claims 3 to 5; wherein M is an integer, M is greater than 2 and M is less than or equal to X, and the first spectrometer is an equal-splitting spectrometer. A light splitting system, characterized in that the light splitting system comprises M cascaded light splitting devices; two adjacent light splitting devices are connected by a multi-core optical cable; The M optical splitting devices include M-1 first optical splitting devices and 1 second optical splitting device, wherein M is an integer and M is greater than 2; The first spectroscopic device is the spectroscopic device according to claim 7, and the second spectroscopic device is the spectroscopic device according to claim 8. A light splitting system, characterized in that the light splitting system comprises M cascaded light splitting devices; two adjacent light splitting devices are connected by a multi-core optical cable, wherein M is an integer and M is greater than 2; The M optical splitting devices include M-1 first optical splitting devices and 1 second optical splitting device. The first spectroscopic device is the spectroscopic device according to claim 6, and the second spectroscopic device is the spectroscopic device according to claim 10.