CN222070892U

CN222070892U - An optical module

Info

Publication number: CN222070892U
Application number: CN202420200934.9U
Authority: CN
Inventors: 黄绪杰; 慕建伟; 王欣南
Original assignee: Hisense Broadband Multimedia Technology Co Ltd
Current assignee: Hisense Broadband Multimedia Technology Co Ltd
Priority date: 2024-01-26
Filing date: 2024-01-26
Publication date: 2024-11-26
Anticipated expiration: 2034-01-26

Abstract

The application discloses an optical module, which comprises a round square tube body, wherein the round square tube body comprises a first tube orifice, the first tube orifice is arranged at one side of the round square tube body along the height direction of the round square tube body, and an optical receiving component is arranged at the first tube orifice. The light receiving part comprises a light receiving chip and a first lens, wherein the light receiving chip and the first lens are not coaxial. The first nozzle is coaxial with the first lens such that the first filter is coaxial with the first lens. The reflecting surface of the first optical filter is obliquely arranged, and the offset direction of the light receiving chip is the same as the oblique direction of the reflecting surface of the first optical filter. In the application, the first optical filter is coaxial with the first lens, the light receiving chip is not coaxial with the first lens, the reflecting surface of the first optical filter is obliquely arranged, and the offset direction of the light receiving chip is the same as the oblique direction of the reflecting surface of the first optical filter, so that an optical signal is obliquely incident to the light receiving chip after being reflected by the first optical filter, and the reflection return loss of the light receiving chip is further reduced.

Description

Optical module

Technical Field

The application relates to the technical field of optical fiber communication, in particular to an optical module.

Background

With the development of new business and application modes such as cloud computing, mobile internet, video and the like, the development and progress of optical communication technology become more and more important. In the optical communication technology, the optical module is a tool for realizing the mutual conversion of optical signals, is one of key devices in optical communication equipment, and the transmission rate of the optical module is continuously improved along with the development of the optical communication technology.

Disclosure of utility model

The application provides an optical module for reducing reflection loss of an optical receiving chip.

An optical module, comprising:

A fiber optic adapter;

An optical emission part for emitting an optical signal;

An optical receiving section for receiving an optical signal; the light receiving part includes a first lens for coupling an optical signal to the light receiving chip, and a light receiving chip offset with respect to the first lens so that the light receiving chip is not coaxial with the first lens;

The round square tube body comprises a first tube orifice, a second tube orifice and a third tube orifice; the light receiving component is arranged at the first pipe orifice, the optical fiber adapter is arranged at the second pipe orifice, the light emitting component is arranged at the third pipe orifice, the first pipe orifice is arranged at one side of the round square pipe body along the height direction of the round square pipe body, and the second pipe orifice and the third pipe orifice are respectively arranged at two ends of the round square pipe body along the length direction of the round square pipe body; an optical assembly is arranged in the round square tube body, the optical assembly comprises a first optical filter, the first optical filter is coaxial with the first tube orifice, the first optical filter is positioned on an emergent light path of the optical fiber adapter so as to reflect an optical signal emitted by the optical fiber adapter to the light receiving component, and the first optical filter is also positioned on an emergent light path of the light emitting component so as to transmit the optical signal emitted by the light emitting component to the optical fiber adapter;

The first nozzle is coaxial with the first lens so that the first filter is coaxial with the first lens; the reflecting surface of the first optical filter is obliquely arranged so that the optical signal is obliquely emitted after being reflected by the reflecting surface of the first optical filter; the offset direction of the light receiving chip is the same as the inclination direction of the reflecting surface of the first optical filter, so that the light receiving chip is positioned on an emergent light path of the light signal reflected by the first optical filter.

An optical module, comprising:

A fiber optic adapter;

An optical emission part for emitting an optical signal;

The first nozzle is coaxial with the first lens so that the first filter is coaxial with the first lens; the height of the first end of the reflecting surface of the first optical filter is larger than that of the second end of the reflecting surface of the first optical filter, so that the optical signal is obliquely emitted towards the second end of the reflecting surface of the first optical filter after being reflected by the reflecting surface of the first optical filter; the light receiving chip is offset from a first end of the reflecting surface of the first optical filter to a second end of the reflecting surface of the first optical filter, so that the light signal reflected by the first optical filter is coupled to the light receiving chip.

The beneficial effects are that: the application provides an optical module, which comprises an optical fiber adapter, an optical emission part, an optical receiving part and a round square tube body, wherein the round square tube body comprises a first tube orifice, a second tube orifice and a third tube orifice, the optical receiving part is arranged at the first tube orifice, the optical fiber adapter is arranged at the second tube orifice, the optical emission part is arranged at the third tube orifice, an optical component is arranged in the round square tube body, light emitted by the optical emission part is transmitted to the optical fiber adapter through the optical component in the round square tube body, and light emitted by the optical fiber adapter is reflected into the optical receiving part through the optical component in the round square tube body. The first pipe orifice is arranged on one side of the round square pipe body along the height direction of the round square pipe body, namely, the first pipe orifice is arranged on the upper side or the lower side of the round square pipe body; the second pipe orifice and the third pipe orifice are arranged at two ends of the round square pipe body along the length direction of the round square pipe body, namely, the second pipe orifice is arranged at the left end of the round square pipe body, and the third pipe orifice is arranged at the right end of the round square pipe body, so that an optical signal emitted by the optical fiber adapter is incident to the optical assembly along the length direction of the round square pipe body and is reflected by the optical assembly and then is emitted to the light receiving component along the height of the round square pipe body. The optical assembly comprises a first optical filter, wherein the first optical filter is coaxial with the first pipe orifice and is positioned on an emergent light path of the optical fiber adapter so as to reflect light emitted by the optical fiber adapter to the light receiving component; the first optical filter is also positioned on the outgoing light path of the light emitting component so as to transmit the light emitted by the light emitting component to the optical fiber adapter. The light receiving part includes a light receiving chip and a first lens for coupling an optical signal to the light receiving chip. In order to improve the reflection loss of the light receiving chip, the light receiving chip is offset with respect to the first lens so that the light receiving chip is not coaxial with the first lens. The first nozzle is coaxial with the first lens such that the first filter is coaxial with the first lens. The first optical filter is coaxial with the first lens, the light receiving chip is not coaxial with the first lens, and the light signal reflected by the first optical filter may not be incident into the light receiving chip. In order to make the light reflected by the first filter enter the light receiving chip, the reflecting surface of the first filter is obliquely arranged so that the light is obliquely emitted after being reflected by the reflecting surface of the first filter. The offset direction of the light receiving chip is the same as the inclined direction of the reflecting surface of the first optical filter, so that the light receiving chip is positioned on the emergent light path of the light reflected by the first optical filter, and the light reflected by the first optical filter is obliquely incident to the light receiving chip. Light is obliquely incident to the light receiving chip, and light rays reflected back to the surface of the light receiving chip are prevented from being returned to the optical fiber adapter along the original path, so that the reflection back loss of the light receiving chip is reduced. In the application, the first optical filter is coaxial with the first lens, the light receiving chip is not coaxial with the first lens, the reflecting surface of the first optical filter is obliquely arranged, and the inclined direction of the reflecting surface of the first optical filter is the same as the offset direction of the light receiving chip, so that the light receiving chip is positioned on the emergent light path of the light reflected by the first optical filter, the light is obliquely emitted after being reflected by the first optical filter, and then is obliquely incident to the light receiving chip, and the reflection return loss of the light receiving chip is further reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a partial block diagram of an optical communication system provided in accordance with some embodiments;

FIG. 2 is a partial block diagram of a host computer according to some embodiments;

FIG. 3 is a block diagram of an optical module provided in accordance with some embodiments;

FIG. 4 is an exploded view of an optical module provided in accordance with some embodiments;

FIG. 5 is a block diagram of an optical transceiver component provided in accordance with some embodiments;

FIG. 6 is an exploded view of an optical transceiver component provided in accordance with some embodiments;

FIG. 7 is a cross-sectional view of an optical transceiver component provided in accordance with some embodiments;

Fig. 8 is a cross-sectional view of a light receiving member provided according to some embodiments;

FIG. 9 is a block diagram of a round square pipe body provided in accordance with some embodiments;

FIG. 10 is a cross-sectional view of a round square tube body provided in accordance with some embodiments;

FIG. 11 is a cross-sectional view of a round square tube body and an optical assembly provided in accordance with some embodiments;

FIG. 12 is a block diagram of a first filter provided in accordance with some embodiments;

FIG. 13 is an optical diagram of a receive optical path provided in accordance with some embodiments;

FIG. 14 is a simulation diagram of a receive optical path provided in accordance with some embodiments;

FIG. 15 is a trace plot of spots provided according to some embodiments;

fig. 16 is a graph of tilt angle of a first filter versus offset of a spot, provided according to some embodiments.

Detailed Description

Some embodiments of the present disclosure will be described in detail and clarity with reference to the following drawings. However, the described embodiments are merely some, but not all, embodiments of the present disclosure. All other embodiments obtained by one of ordinary skill in the art based on the embodiments provided by the present disclosure are within the scope of the present disclosure.

Throughout the specification and claims, the term "comprising" is to be interpreted as an open, inclusive meaning, i.e. "comprising, but not limited to,", unless the context requires otherwise; the terms "first," "second," and "first" are not to be construed as indicating or implying a relative importance or upper limit of the indicated number; the term "plurality" means two or more; the term "coupled" is to be interpreted broadly, as referring to, for example, a fixed connection, a removable connection, or a combination thereof, as well as directly or indirectly via an intermediary; the use of the term "adapted to" or "configured to" is meant to be an open and inclusive language that does not exclude devices adapted to or configured to perform additional tasks or steps; the terms "parallel", "perpendicular", "identical", "flush", etc. describe, without being limited to absolute mathematical theoretical relationships, also include acceptable ranges of error arising in practice, and also include differences based on the same design concept but due to manufacturing reasons.

In the optical communication technology, in order to establish information transfer between information processing apparatuses, it is necessary to load information onto light, and transfer of information is realized by propagation of light. Here, the light loaded with information is an optical signal. The optical signal can reduce the loss of optical power when transmitted in the information transmission device, so that high-speed, long-distance and low-cost information transmission can be realized. The signal that the information processing apparatus can recognize and process is an electrical signal. Information processing devices typically include optical network terminals (Optical Network Unit, ONUs), gateways, routers, switches, handsets, computers, servers, tablets, televisions, etc., and information transmission devices typically include optical fibers, optical waveguides, etc.

The optical module can realize the mutual conversion of optical signals and electric signals between the information processing equipment and the information transmission equipment. For example, at least one of the optical signal input end or the optical signal output end of the optical module is connected with an optical fiber, and at least one of the electrical signal input end or the electrical signal output end of the optical module is connected with an optical network terminal; the optical module converts the first optical signal into a first electrical signal and transmits the first electrical signal to an optical network terminal; the second electrical signal from the optical network terminal is transmitted to the optical module, which converts the second electrical signal into a second optical signal and transmits the second optical signal to the optical fiber. Since information transmission can be performed between the plurality of information processing apparatuses by an electric signal, it is necessary that at least one of the plurality of information processing apparatuses is directly connected to the optical module, and it is unnecessary that all of the information processing apparatuses are directly connected to the optical module. Here, the information processing apparatus directly connected to the optical module is referred to as an upper computer of the optical module. In addition, the optical signal input or the optical signal output of the optical module may be referred to as an optical port, and the electrical signal input or the electrical signal output of the optical module may be referred to as an electrical port.

Fig. 1 is a partial block diagram of an optical communication system provided in accordance with some embodiments. As shown in fig. 1, the optical communication system mainly includes a remote information processing apparatus 1000, a local information processing apparatus 2000, a host computer 100, an optical module 200, an optical fiber 101, and a network cable 103.

One end of the optical fiber 101 extends in the direction of the remote information processing apparatus 1000, and the other end of the optical fiber 101 is connected to the optical module 200 through an optical port of the optical module 200. The optical signal may be totally reflected in the optical fiber 101, and the propagation of the optical signal in the direction of total reflection may almost maintain the original optical power, and the optical signal may be totally reflected in the optical fiber 101 a plurality of times to transmit the optical signal from the remote information processing apparatus 1000 into the optical module 200, or transmit the optical signal from the optical module 200 to the remote information processing apparatus 1000, thereby realizing remote, low power loss information transfer.

The optical communication system may include one or more optical fibers 101, and the optical fibers 101 are detachably connected, or fixedly connected, with the optical module 200. The upper computer 100 is configured to provide data signals to the optical module 200, or receive data signals from the optical module 200, or monitor or control the operating state of the optical module 200.

The host computer 100 includes a substantially rectangular parallelepiped housing (housing), and an optical module interface 102 provided on the housing. The optical module interface 102 is configured to access the optical module 200, so that the host computer 100 and the optical module 200 establish a unidirectional or bidirectional electrical signal connection.

The upper computer 100 further includes an external electrical interface, which may access an electrical signal network. For example, the pair of external electrical interfaces includes a universal serial bus interface (Universal Serial Bus, USB) or a network cable interface 104, and the network cable interface 104 is configured to access the network cable 103 so as to establish a unidirectional or bidirectional electrical signal connection between the host computer 100 and the network cable 103. One end of the network cable 103 is connected to the local information processing apparatus 2000, and the other end of the network cable 103 is connected to the host computer 100, so that an electrical signal connection is established between the local information processing apparatus 2000 and the host computer 100 through the network cable 103. For example, the third electrical signal sent by the local information processing apparatus 2000 is transmitted to the upper computer 100 through the network cable 103, the upper computer 100 generates a second electrical signal according to the third electrical signal, the second electrical signal from the upper computer 100 is transmitted to the optical module 200, the optical module 200 converts the second electrical signal into a second optical signal, and the second optical signal is transmitted to the optical fiber 101, where the second optical signal is transmitted to the remote information processing apparatus 1000 in the optical fiber 101. For example, a first optical signal from the remote information processing apparatus 1000 propagates through the optical fiber 101, the first optical signal from the optical fiber 101 is transmitted to the optical module 200, the optical module 200 converts the first optical signal into a first electrical signal, the optical module 200 transmits the first electrical signal to the host computer 100, the host computer 100 generates a fourth electrical signal from the first electrical signal, and the fourth electrical signal is transmitted to the local information processing apparatus 2000. The optical module is a tool for realizing the mutual conversion between the optical signal and the electric signal, and the information is not changed in the conversion process of the optical signal and the electric signal, and the coding and decoding modes of the information can be changed.

The host computer 100 includes an Optical line terminal (Optical LINE TERMINAL, OLT), an Optical network device (Optical Network Terminal, ONT), a data center server, or the like, in addition to the Optical network terminal.

Fig. 2 is a partial block diagram of a host computer according to some embodiments. In order to clearly show the connection relationship between the optical module 200 and the host computer 100, fig. 2 only shows the structure of the host computer 100 related to the optical module 200. As shown in fig. 2, the upper computer 100 further includes a PCB circuit board 105 disposed in the housing, a cage 106 disposed on a surface of the PCB circuit board 105, a heat sink 107 disposed on the cage 106, and an electrical connector disposed inside the cage 106. The electrical connector is configured to access an electrical port of the optical module 200; the heat sink 107 has a convex structure such as a fin that increases the heat dissipation area.

The optical module 200 is inserted into the cage 106 of the host computer 100, the optical module 200 is fixed by the cage 106, and heat generated by the optical module 200 is transferred to the cage 106 and then diffused through the heat sink 107. After the optical module 200 is inserted into the cage 106, the electrical port of the optical module 200 is connected with the electrical connector inside the cage 106, so that the optical module 200 and the host computer 100 are connected by bi-directional electrical signals. Furthermore, the optical port of the optical module 200 is connected to the optical fiber 101, so that the optical module 200 establishes a bi-directional optical signal connection with the optical fiber 101.

Fig. 3 is a block diagram of an optical module provided in accordance with some embodiments, and fig. 4 is an exploded view of an optical module provided in accordance with some embodiments. As shown in fig. 3 and 4, the optical module 200 includes a housing (shell), a circuit board 300 disposed in the housing, and an optical transceiver 900.

The housing includes an upper housing 201 and a lower housing 202, the upper housing 201 being capped on the lower housing 202 to form the above-described housing having two openings 204 and 205; the outer contour of the housing generally presents a square shape.

In some embodiments, the lower housing 202 includes a bottom plate 2021 and two lower side plates 2022 disposed on both sides of the bottom plate 2021 and perpendicular to the bottom plate 2021; the upper housing 201 includes a cover 2011, and the cover 2011 is covered on two lower side plates 2022 of the lower housing 202 to form the housing.

In some embodiments, the lower housing 202 includes a bottom plate 2021 and two lower side plates 2022 disposed on both sides of the bottom plate 2021 and perpendicular to the bottom plate 2021; the upper housing 201 includes a cover 2011, and two upper side plates disposed on two sides of the cover 2011 and perpendicular to the cover 2011, and the two upper side plates are combined with two lower side plates 2022 to cover the upper housing 201 on the lower housing 202.

The direction of the connection line of the two openings 204 and 205 may be identical to the length direction of the optical module 200 or not identical to the length direction of the optical module 200. For example, opening 204 is located at the end of light module 200 (right end of fig. 3) and opening 205 is also located at the end of light module 200 (left end of fig. 3). Or opening 204 is located at the end of light module 200 and opening 205 is located at the side of light module 200. The opening 204 is an electrical port, and the golden finger of the circuit board 300 extends out of the electrical port and is inserted into the electrical connector of the upper computer 100; the opening 205 is an optical port configured to access the external optical fiber 101 such that the optical fiber 101 is connected to the optical transceiver 900 in the optical module 200.

The circuit board 300, the optical transceiver 900 and the like are conveniently mounted in the upper and lower housings 201 and 202 by adopting a combined assembly mode, and the upper and lower housings 201 and 202 can encapsulate and protect the devices. In addition, when the circuit board 300, the optical transceiver component 900, and the like are assembled, the positioning component, the heat dissipation component, and the electromagnetic shielding component of these devices are easily disposed, which is advantageous for automating the production.

In some embodiments, the upper housing 201 and the lower housing 202 are made of metal materials, which is beneficial to electromagnetic shielding and heat dissipation.

In some embodiments, the light module 200 further includes an unlocking member 600 located outside its housing. The unlocking part 600 is configured to achieve a fixed connection between the optical module 200 and the upper computer, or to release the fixed connection between the optical module 200 and the upper computer.

For example, the unlocking member 600 is located outside the two lower side plates 2022 of the lower housing 202, and includes an engaging member that mates with the cage 106 of the upper computer 100. When the optical module 200 is inserted into the cage 106, the optical module 200 is fixed in the cage 106 by the engaging part of the unlocking part 600; when the unlocking member 600 is pulled, the engaging member of the unlocking member 600 moves along with the unlocking member, so that the connection relationship between the engaging member and the host computer is changed, and the fixation between the optical module 200 and the host computer is released, so that the optical module 200 can be pulled out from the cage 106.

The circuit board 300 includes circuit traces, electronic components, chips, etc., and the electronic components and the chips are connected according to a circuit design through the circuit traces to realize functions of power supply, electric signal transmission, grounding, etc. The electronic components may include, for example, capacitors, resistors, transistors, metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET). The chips may include, for example, a micro control unit (Microcontroller Unit, MCU), a laser driving chip, a transimpedance amplifier (TRANSIMPEDANCE AMPLIFIER, TIA), a limiting amplifier (LIMITING AMPLIFIER, LIA), a clock data recovery chip (Clock and Data Recovery, CDR), a power management chip, a Digital Signal Processing (DSP) chip.

The circuit board 300 is generally a hard circuit board, and the hard circuit board can also realize a bearing function due to the relatively hard material, for example, the hard circuit board can stably bear the electronic components and chips; the rigid circuit board may also be inserted into an electrical connector in the cage 106 of the host computer 100.

The circuit board 300 further includes a gold finger formed on an end surface thereof, the gold finger being composed of a plurality of pins independent of each other. The circuit board 300 is inserted into the cage 106 and is electrically connected to the electrical connectors within the cage 106 by the gold fingers. The golden finger can be arranged on the surface of one side of the circuit board 300 (such as the upper surface shown in fig. 4) or on the surfaces of the upper side and the lower side of the circuit board 300, so as to provide more pins, thereby being suitable for occasions with high pin number requirements. The golden finger is configured to establish electrical connection with the upper computer to realize power supply, grounding, two-wire synchronous serial (Inter-INTEGRATED CIRCUIT, I2C) signal transmission, data signal transmission and the like. Of course, flexible circuit boards may also be used in some optical modules. The flexible circuit board is generally used in cooperation with the rigid circuit board to supplement the rigid circuit board.

The optical transceiver 900 includes an optical transmitting part 902 and an optical receiving part 903, the optical transmitting part 902 being configured to realize transmission of an optical signal, and the optical receiving part 903 being configured to realize reception of the optical signal. Illustratively, the light emitting member 902 and the light receiving member 903 are joined together to form an integral light transceiving member 900.

Fig. 5 is a block diagram of an optical transceiver component provided in accordance with some embodiments. Fig. 6 is an exploded view of an optical transceiver component provided in accordance with some embodiments. Fig. 7 is a cross-sectional view of an optical transceiver component provided in accordance with some embodiments. As shown in fig. 5, 6, and 7, in some embodiments, the optical transceiver component 900 includes a round square tube 901, a light emitting component 902, a light receiving component 903, an optical component 904, and a fiber optic adapter 700. In particular, the method comprises the steps of,

A round square tube body 901 having a third tube orifice, a first tube orifice and a second tube orifice for carrying the stationary light emitting member 902, the light receiving member 903, the optical component 904 and the fiber optic adapter 700. Specifically, the light emitting member 902 is disposed at the third nozzle, the light receiving member 903 is disposed at the first nozzle, the optical component 904 is disposed in the inner cavity of the circular square tubular body 901, and the optical fiber adapter 700 is disposed at the second nozzle.

In general, the third pipe orifice and the first pipe orifice are respectively disposed on adjacent side walls of the round square pipe body 901, the third pipe orifice and the second pipe orifice are respectively disposed on side walls of the length direction of the round square pipe body 901, and the first pipe orifice is disposed on side walls of the height direction of the round square pipe body 901.

The round square tube 901 is generally made of metal materials, which is beneficial to electromagnetic shielding and heat dissipation. Specifically, the light emitting member 902 and the light receiving member 903 are press-fitted directly into the round square tube body 901, and the round square tube body 901 is in contact with the light emitting member 902 and the light receiving member 903, respectively, directly or through a heat conductive medium. The circular square tube body 901 can be used for heat dissipation of the light emitting part 902 and the light receiving part 903, and the heat dissipation effect of the light emitting part 902 and the light receiving part 903 is ensured.

The light emitting part 902 is connected with the circuit board 300 through a flexible circuit board for emitting an optical signal.

In some embodiments, the light emitting component 902 includes a laser chip. The optical signals emitted by the laser chips are coupled into the fiber optic adapter 700 via the optical assembly 904.

The light receiving part 903 is connected to the circuit board 300 through a flexible circuit board for receiving an optical signal.

In some embodiments, the light receiving component 903 includes a receiving socket and a receiving cap, where the receiving cap is disposed over the receiving socket, and the receiving cap and the receiving socket define a cavity. The top of the receiving tube seat is provided with a light receiving chip. The light receiving chip receives the light signal reflected by the optical component 904.

The optical component 904 is disposed in the inner cavity of the circular square tube 901, and is used for adjusting the optical signal emitted by the light emitting component 902 and the optical signal incident on the light receiving component 903.

The optical fiber adapter 700 is used for connecting optical fibers. Specifically, the light emitting member 902 is connected to the third pipe orifice of the circular square pipe body, the light receiving member 903 is disposed at the first pipe orifice of the circular square pipe body, the optical fiber adapter 700 is disposed at the second pipe orifice of the circular square pipe body, and the light emitting member 902 and the light receiving member 903 are respectively optically connected to the optical fiber adapter 700. The optical signal sent by the optical transmitting component 902 and the light received by the optical receiving component 903 are transmitted through the same optical fiber in the optical fiber adapter 700, that is, the same optical fiber in the optical fiber adapter 700 is a transmission channel for the light passing in and out of the optical transceiver component, and the optical transceiver component realizes a single-fiber bidirectional optical transmission mode.

Fig. 8 is a cross-sectional view of a light receiving member provided according to some embodiments. As shown in fig. 8, in some embodiments, the light receiving part 903 includes a receiving socket 931 and a receiving cap 932, the receiving cap 932 covers the receiving socket 931, and the receiving cap 932 and the receiving socket 931 define a cavity. The light receiving chip 934 is disposed on top of the receiving socket 931, and the first through hole 935 is disposed on top of the receiving cap 932 and embedded therein. The optical assembly 904 reflects the optical signal within the circular square tube to a first lens 935, which first lens 935 focuses the optical signal to a light receiving chip 934.

In the present application, the width direction of the round square tube 901 is set to be the X-axis direction, the length direction of the round square tube 901 is set to be the Z-axis direction, and the height direction of the round square tube 901 is set to be the Y-axis direction.

In some embodiments, the central axis of the light receiving chip 934 is not coincident with the central axis of the first lens 935, i.e., the light receiving chip 934 is not coaxial with the first lens 935. Illustratively, the light receiving chip 934 is offset along the width direction of the circular square tube body 901, i.e., the light receiving chip 934 is offset along the X-axis direction; or the light receiving chip 934 is offset along the length direction of the circular square tube body 901, that is, the light receiving chip 934 is offset along the Z-axis direction.

Fig. 9 is a block diagram of a round square pipe body provided according to some embodiments. Fig. 10 is a cross-sectional view of a round square tube provided in accordance with some embodiments. Fig. 11 is a cross-sectional view of a round square tube body and an optical assembly provided in accordance with some embodiments. As shown in fig. 9, 10 and 11, in some embodiments, the round square tube body 901 includes a third tube orifice 911, a first tube orifice 912 and a second tube orifice 913, the third tube orifice 911 and the second tube orifice 913 are respectively disposed at two ends of the round square tube body 901 along the length direction of the round square tube body 901, the third tube orifice 911 is located at an end of the round square tube body 901 facing the light emitting component 902, and the second tube orifice 913 is located at an end of the round square tube body 901 facing the optical fiber adapter 700. Illustratively, the third pipe orifice 911 is disposed at the left end of the round square pipe body 901 along the length direction of the round square pipe body 901, and the second pipe orifice 913 is disposed at the right end of the round square pipe body 901 along the length direction of the round square pipe body 901; or the third pipe orifice 911 is provided at the right end of the round square pipe body 901 along the length direction of the round square pipe body 901, and the second pipe orifice 913 is provided at the left end of the round square pipe body 901 along the length direction of the round square pipe body 901.

The first nozzle 912 is provided on one side of the round square tube body 901 along the height direction of the round square tube body 901, and the first nozzle 912 is provided on the side of the round square tube body 901 facing the light receiving member 903. Illustratively, the first nozzle 912 is disposed on the upper side of the round square tube body 901 along the height direction of the round square tube body 901, or the first nozzle 912 is disposed on the lower side of the round square tube body 901 along the height direction of the round square tube body 901.

In the embodiment of the present application, the optical transceiver 900 is specifically described by taking the example that the third pipe orifice 911 is provided at the left end of the round square pipe body 901 along the length direction of the round square pipe body 901, the second pipe orifice 913 is provided at the right end of the round square pipe body 901 along the length direction of the round square pipe body 901, and the first pipe orifice 912 is provided at the upper side of the round square pipe body 901 along the height direction of the round square pipe body 901.

The light emitting member 902 is embedded in the third nozzle 911, and the optical fiber adapter 700 is embedded in the second nozzle 913, and the third nozzle 911 communicates with the first nozzle 912 through the second through hole 914, so that the optical signal emitted by the light emitting member 902 is transmitted to the optical fiber adapter 700 through the second through hole 914.

The light receiving member 903 is fitted to the first nozzle 912, and the first nozzle 912 and the second nozzle 913 communicate with each other through the third through hole 9151, so that the optical signal emitted from the optical fiber adapter 700 is transmitted to the light receiving member 903.

In order for the optical signal emitted by the fiber optic adapter 700 to be transmitted to the light receiving component 903, in some embodiments, the optical assembly 904 includes a first filter 941, the first filter 941 being located on the left side of the fiber optic adapter 700 and on the outgoing optical path of the fiber optic adapter 700 such that the first filter 941 receives the received light emitted by the fiber optic adapter 700 and reflects the received light to the light receiving component 903. Wherein the received light is an optical signal emitted by the fiber optic adapter 700.

In some embodiments, the first filter 941 is further positioned on the outgoing light path of the light emitting component 902, such that the first filter 941 receives the light signal emitted by the light emitting component and transmits the emitted light to the fiber optic adapter 700. Wherein the emitted light is an optical signal emitted by the fiber optic adapter 700.

Since part of the emitted light is reflected by the fiber end face of the fiber adapter 700 and then enters the first optical filter 941, the first optical filter 941 receives not only the received light but also part of the emitted light, and the received light or part of the emitted light is reflected by the first optical filter 941 and then enters the light receiving element 903.

In some embodiments, the two sidewalls of the second through hole 914 have a first support plate 916, and a first optical filter 941 is disposed on the first support plate 916, so that the first optical filter 941 is located above the second through hole 914, and the optical signal emitted by the light emitting component 902 is incident to the first optical filter 941 through the second through hole 914 and is transmitted into the optical fiber adapter 700 through the first optical filter 941. Illustratively, the first filter 941 is bonded to two first support plates 916.

In some embodiments, the angle between the first support plate 916 and the bottom of the square tube 901 is 45 °, so that the optical signal emitted by the optical fiber adapter 700 is reflected by the first optical filter 941 and then vertically emitted along the height direction of the square tube 901.

In some embodiments, the bottom surface of the first nozzle 912 is a first supporting surface 9121, and the center of the first supporting surface 9121 is recessed inward to form a third through hole 9151, and the third through hole 9151 is located above the first optical filter 941, so that the received light or part of the emitted light is reflected by the first optical filter 941 and then enters the light receiving part 903 through the third through hole 9151.

In some embodiments, the optical assembly further includes a second filter 942, the second filter 942 being located directly below the light-receiving member 903 for filtering out light of wavelengths other than the received light.

The second filter 942 is a 0 ° filter, so that the transmittance of the received light is 100%, that is, the reflectance of the emitted light is 100%. That is, when the incident light is the emitted light, the incident light enters the second filter 942, and the incident light is reflected back in the original path; when the incident light is the received light, the incident light is incident on the second filter 942, and the incident light is completely transmitted. Wherein the emitted light is an optical signal emitted by the light emitting part 902.

In some embodiments, the center of the first supporting surface 9121 is recessed inwards to form a limiting plate 9122, the center of the limiting plate 9122 is recessed inwards to form a second supporting plate 915, a second optical filter 942 is placed on the second supporting plate 915, the center of the second supporting plate 915 forms a third through hole 9151, and the third through hole 9151 is located above the first optical filter 941, so that received light or part of emitted light is reflected by the first optical filter 941, then enters the second optical filter 942, and is transmitted to the light receiving component 903 through the second optical filter 942.

To improve the return loss of the light receiving chip 934, in some embodiments, the light receiving chip 934 is offset along the Z-axis direction within the light receiving component 903 (i.e., the light receiving chip 934 is offset along the length of the circular square tube) such that the light receiving chip 934 is not coaxial with the first lens 935; the light receiving member 903 is moved along the Z-axis direction (i.e., the light receiving member 903 is offset along the length direction of the circular square tube body) so that the first lens 935 is not coaxial with the first nozzle 912, i.e., the first lens 935 is not coaxial with the first filter 941, and thus the principal ray of the optical signal reflected by the first filter 941 is obliquely incident on the light receiving chip 934. The optical signal is obliquely incident to the optical receiving chip 934, so that the light reflected back from the surface of the optical receiving chip 934 is prevented from being returned to the optical fiber adapter along the original path, and the reflection back loss is reduced.

In some embodiments, the first nozzle 912 also moves in the Z-axis direction such that the light receiving member 903 is coaxial with the first nozzle 912, i.e., the first lens 935 is coaxial with the first nozzle 912. When the light receiving part 903 is subjected to glue spreading pre-curing, the glue thickness around the light receiving part 903 is uniform, and the influence of the position shifting of the light receiving part 903 in the later period on the received light power is avoided.

Since the light signal incident on the first filter 941 is collimated light, the spots after convergent coupling via the first lens 935 are at the same position regardless of the offset of the light receiving chip 934 and the light receiving member 903. Thus, in some embodiments, the optical signal incident on the first optical filter 941 is non-collimated light, and the light spot after converging and coupling through the first lens 935 is offset along the offset direction of the light receiving chip 934 and the light receiving component 903.

The light receiving chip 934 is limited by the pin routing layout, and the light receiving chip 934 cannot be eccentrically mounted along the Z-axis direction, but the light receiving chip 934 is only allowed to be eccentric along the X-axis direction. That is, in some embodiments, the light receiving chip 934 is offset in the X-axis direction such that the light receiving chip 934 is not coaxial with the first lens 935; the light receiving member 903 is moved in the X-axis direction so that the first lens 935 is not coaxial with the first nozzle 912, i.e., the first lens 935 is not coaxial with the first filter 941, and so that the main fiber of the non-collimated light beam reflected by the first filter 941 is obliquely incident to the light receiving chip 934. However, the thickness of the structural wall in the width direction of the circular square tube is limited, and the first nozzle 912 cannot be bored eccentrically in the X-axis direction, so that the light receiving member 903 cannot be coaxial with the first nozzle 912, and the light receiving member 903 is liable to be displaced, resulting in a low received light power. To address this issue, in some embodiments, the light receiving chip 934 is offset relative to the first lens 935 such that the light receiving chip 934 is not coaxial with the first lens 935; the first lens 935 is coaxial with the first nozzle 912, and the first filter 941 is coaxial with the first nozzle 912 such that the first filter 941 is coaxial with the first lens 935; the reflecting surface of the first optical filter 941 is obliquely arranged, so that light is obliquely emitted after being reflected by the reflecting surface of the first optical filter 941; the offset direction of the light receiving chip 934 is the same as the inclination direction of the reflecting surface of the first optical filter 941, so that the light receiving chip 934 is located on the outgoing light path of the light signal reflected by the first optical filter 941, and the light signal reflected by the first optical filter 941 is obliquely incident to the light receiving chip 934.

Illustratively, the light receiving chip 934 is offset in the X-axis direction (i.e., the light receiving chip 934 is offset in the width direction of the circular square tube body); the first lens 935 is coaxial with the first nozzle 912, and the first filter 941 is coaxial with the first nozzle 912 such that the first lens 935 is coaxial with the first filter 941; the reflection surface of the first optical filter 941 is inclined in the width direction of the circular and square tube body so that light is reflected by the reflection surface of the first optical filter 941 and then emitted obliquely in the width direction of the circular and square tube body (light is emitted obliquely in the X-axis direction); the offset direction of the light receiving chip 934 is the same as the inclination direction of the reflecting surface of the first optical filter 941, so that the light receiving chip 934 is located on the outgoing light path of the optical signal reflected by the first optical filter 941, and the light reflected by the first optical filter 941 is obliquely incident to the light receiving chip 934.

In some embodiments, the tilt orientation of the reflective surface of the first filter 941 is right and the offset orientation of the light receiving chip 934 is right such that the offset orientation of the light receiving chip 934 is the same as the tilt orientation of the reflective surface of the first filter 941.

In some embodiments, the tilt orientation of the reflective surface of the first filter 941 is left and the offset orientation of the light receiving chip 934 is left such that the offset orientation of the light receiving chip 934 is the same as the tilt orientation of the reflective surface of the first filter 941.

Fig. 12 is a block diagram of a first filter provided in accordance with some embodiments. Fig. 13 is an optical diagram of a receive optical path provided in accordance with some embodiments. The dashed line in fig. 13 is the central axis of the first lens 935. Fig. 12a is a structure diagram of the first filter in the Y-Z plane, and fig. 12 b is a structure diagram of the first filter in the X-Y plane. As shown in fig. 12 and 13, in some embodiments, the first optical filter 941 includes a lower surface and a reflecting surface, where the lower surface and the reflecting surface are disposed opposite to each other, the lower surface is attached to the first support plate 916 of the round square tube 901, the reflecting surface faces the light receiving component 903 and the optical fiber adapter 700, and a part of the light signal composed of the emitted light and the received light emitted by the optical fiber adapter 700 is reflected by the reflecting surface and then emitted.

In some embodiments, the lower surface of the first optical filter 941 is level, the included angle between the lower surface of the first optical filter 941 and the Z axis is 45 °, and the reflective surface of the first optical filter 941 is obliquely disposed along the X axis direction, so that the optical signal is reflected by the reflective surface and then obliquely emitted along the X axis direction, and the optical signal is obliquely incident to the light receiving chip 934.

In some embodiments, the height of the first end of the reflective surface of the first optical filter 941 is greater than the height of the second end of the reflective surface of the first optical filter 941, so that the optical signal is reflected by the reflective surface of the first optical filter 941 and then obliquely emitted towards the second end of the reflective surface of the first optical filter 941 along the width direction of the circular square tube 901. For example, the first end of the reflecting surface of the first optical filter 941 is located at the left side of the second end of the reflecting surface of the first optical filter 941, that is, the inclination of the reflecting surface of the first optical filter 941 faces to the right, and the optical signal is reflected by the reflecting surface of the first optical filter 941 and then emitted obliquely to the right along the width direction of the circular square tube 901; or the first end of the reflecting surface of the first optical filter 941 is located on the right side of the second end of the reflecting surface of the first optical filter 941, that is, the inclination of the reflecting surface of the first optical filter 941 faces to the left, and the optical signal is reflected by the reflecting surface of the first optical filter 941 and then emitted obliquely to the left along the width direction of the circular square tube 901.

In some embodiments, the height of the reflective surface of the first optical filter 941 does not gradually change along the width direction of the circular square tube 901, such that the height of the first end of the reflective surface of the first optical filter 941 is greater than the height of the second end of the reflective surface of the first optical filter 941. Illustratively, the height of the reflecting surface of the first optical filter 941 is from left to right along the width direction (i.e., along the X-axis direction) of the circular square tube 901, and is constant, then constant, and then reduced, so that the first end of the reflecting surface of the first optical filter 941 is greater than the height of the second end of the reflecting surface of the first optical filter 941; or the height of the reflecting surface of the first optical filter 941 is from left to right along the width direction (i.e., along the X-axis direction) of the circular square tube 901, and is unchanged, then increased, and then increased, so that the first end of the reflecting surface of the first optical filter 941 is greater than the height of the second end of the reflecting surface of the first optical filter 941.

In some embodiments, the height of the reflective surface of the first optical filter 941 varies gradually along the width direction of the circular square tube 901, such that the height of the first end of the reflective surface of the first optical filter 941 is greater than the height of the second end of the reflective surface of the first optical filter 941. Illustratively, the height of the reflective surface of the first optical filter 941 gradually decreases from left to right along the width direction (i.e., along the X-axis direction) of the circular square tube 901, such that the first end of the reflective surface of the first optical filter 941 is greater than the height of the second end of the reflective surface of the first optical filter 941, wherein the first end of the reflective surface of the first optical filter 941 is located to the left of the second end of the reflective surface of the first optical filter 941; or the height of the reflecting surface of the first optical filter 941 gradually increases from left to right along the width direction (i.e., along the X-axis direction) of the circular square tube 901, so that the first end of the reflecting surface of the first optical filter 941 is greater than the height of the second end of the reflecting surface of the first optical filter 941, where the first end of the reflecting surface of the first optical filter 941 is located on the right side of the second end of the reflecting surface of the first optical filter 941.

The reflecting surface of the first optical filter 941 is obliquely disposed along the X-axis direction, that is, the included angle between the reflecting surface of the first optical filter 941 and the horizontal plane is not zero, that is, the inclination angle of the reflecting surface of the first optical filter 941 is not zero.

The difference in height between the first end of the reflective surface of the first optical filter 941 and the second end of the reflective surface of the first optical filter 941 and the inclination angle of the reflective surface of the first optical filter 941 are positively correlated, i.e., L ₁＝L₀ ×tan α, where L ₁ is the difference in height between the first end of the reflective surface of the first optical filter 941 and the second end of the reflective surface of the first optical filter 941, L ₀ is the length of the lower surface of the first optical filter 941 along the X axis, and α is the inclination angle of the reflective surface of the first optical filter 941. Illustratively, the greater the difference in height between the first end of the reflective surface of the first filter 941 and the second end of the reflective surface of the first filter 941, the greater the tilt angle α of the reflective surface of the first filter 941.

In some embodiments, the inclination angle of the reflective surface of the first optical filter 941 and the offset of the light receiving chip 934 are in a first preset relationship, so that the optical signal is reflected by the reflective surface of the first optical filter 941 and then is incident into the light receiving chip 934.

On the Y-Z plane, the optical signal is reflected by the first optical filter 941 and then vertically emitted to the second optical filter 942 along the Y-axis direction, the optical signal is filtered by the second optical filter 942 to filter out light of wavelengths other than the received light, and the received light in the optical signal is converged to the light receiving chip 934 by the first lens 935.

As shown in fig. 13, the first lens 935 is not coaxial with the light receiving chip 934, and on the X-Y plane, the optical signal is reflected by the first optical filter 941 and then obliquely emitted to the second optical filter 942 along the X-axis direction, the optical signal is filtered by the second optical filter 942 to filter out light of wavelengths other than the received light, and the received light in the optical signal is obliquely converged to the light receiving chip 934 by the first lens 935.

Fig. 14 is a simulation diagram of a receive optical path provided in accordance with some embodiments. Fig. 15 is a trace diagram of a spot provided in accordance with some embodiments. Fig. 16 is a graph of tilt angle of a first filter versus offset of a spot, provided according to some embodiments. In fig. 14, the broken line indicates the central axis of the first lens, and the plurality of receiving optical paths from left to right in fig. 14 indicate the plurality of receiving optical paths having the inclination angle α of the first filter 941 gradually increasing. The plurality of light spots from right to left in fig. 15 are light spots in which the inclination angle α of the first filter 941 gradually increases. As shown in fig. 14, 15, and 16, as the inclination angle α of the first filter 941 increases gradually, the offset amount of the spot along the X axis increases gradually.

Since the light spot is located on the light receiving chip 934, as the inclination angle α of the first optical filter 941 increases gradually, the offset amount of the light spot along the X axis increases gradually, and the offset amount of the light receiving chip 934 also increases gradually.

As shown in fig. 16, the first preset relationship is y= -0.5541X ² +17.347X-18.132, where X is the inclination angle α of the first optical filter 941, and y is the offset of the light spot along the X axis, that is, the offset of the light receiving chip along the X axis.

However, when the inclination angle of the reflecting mirror is too large, off-axis aberration of the optical path may be increased, and additional coma is generated to cause the light spot to be dispersed, as shown in fig. 15. Therefore, in some embodiments, the inclination angle of the reflecting surface of the first optical filter 941 is 3 ° to 8 °, so as to avoid the light spot coupled by the first lens 935 from dispersing.

In some embodiments, the angle of inclination of the reflective surface of the first filter 941 is 3 ° to 5 °.

In some embodiments, the angle of inclination of the reflective surface of the first filter 941 is 5 ° to 7 °.

In some embodiments, the angle of inclination of the reflective surface of the first filter 941 is 7 ° to 8 °.

In some embodiments, the optical module comprises an optical fiber adapter, a light emitting component, a light receiving component and a round square tube body, wherein the round square tube body comprises a first tube opening, a second tube opening and a third tube opening, the light receiving component is arranged at the first tube opening, the optical fiber adapter is arranged at the second tube opening, the light emitting component is arranged at the third tube opening, an optical assembly is arranged in the round square tube body, light emitted by the light emitting component is transmitted to the optical fiber adapter through the optical assembly in the round square tube body, and light emitted by the optical fiber adapter is reflected into the light receiving component through the optical assembly in the round square tube body. The first pipe orifice is arranged on one side of the round square pipe body along the height direction of the round square pipe body, namely, the first pipe orifice is arranged on the upper side or the lower side of the round square pipe body; the second pipe orifice and the third pipe orifice are arranged at two ends of the round square pipe body along the length direction of the round square pipe body, namely, the second pipe orifice is arranged at the left end of the round square pipe body, and the third pipe orifice is arranged at the right end of the round square pipe body, so that an optical signal emitted by the optical fiber adapter is incident to the optical assembly along the length direction of the round square pipe body and is reflected by the optical assembly and then is emitted to the light receiving component along the height of the round square pipe body. The optical assembly comprises a first optical filter, wherein the first optical filter is coaxial with the first pipe orifice and is positioned on an emergent light path of the optical fiber adapter so as to reflect light emitted by the optical fiber adapter to the light receiving component; the first optical filter is also positioned on the outgoing light path of the light emitting component so as to transmit the light emitted by the light emitting component to the optical fiber adapter. the light receiving part includes a light receiving chip and a first lens for coupling an optical signal to the light receiving chip. In order to improve the reflection loss of the light receiving chip, the light receiving chip is offset with respect to the first lens so that the light receiving chip is not coaxial with the first lens. The first nozzle is coaxial with the first lens such that the first filter is coaxial with the first lens. The first optical filter is coaxial with the first lens, the light receiving chip is not coaxial with the first lens, and the light signal reflected by the first optical filter may not be incident into the light receiving chip. In order to make the light reflected by the first filter enter the light receiving chip, the reflecting surface of the first filter is obliquely arranged so that the light is obliquely emitted after being reflected by the reflecting surface of the first filter. The offset direction of the light receiving chip is the same as the inclined direction of the reflecting surface of the first optical filter, so that the light receiving chip is positioned on the emergent light path of the light reflected by the first optical filter, and the light reflected by the first optical filter is obliquely incident to the light receiving chip. Light is obliquely incident to the light receiving chip, and light rays reflected back to the surface of the light receiving chip are prevented from being returned to the optical fiber adapter along the original path, so that the reflection back loss of the light receiving chip is reduced. In some embodiments, the first optical filter is coaxial with the first lens, the light receiving chip is not coaxial with the first lens, the reflecting surface of the first optical filter is obliquely arranged, and the oblique orientation of the reflecting surface of the first optical filter is the same as the offset orientation of the light receiving chip, so that the light receiving chip is positioned on the outgoing light path of the light reflected by the first optical filter, so that the light is obliquely emitted after being reflected by the first optical filter and obliquely incident to the light receiving chip, and further the reflection return loss of the light receiving chip is reduced. Finally, it should be noted that: the above embodiments are merely for illustrating the technical solution of the present disclosure, and are not limiting thereof; although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.

Claims

1. An optical module, comprising:

A fiber optic adapter;

An optical emission part for emitting an optical signal;

2. The optical module according to claim 1, wherein the light receiving chip is offset with respect to the first lens in a width direction of the circular square tube body, and the reflection surface of the first optical filter is disposed obliquely in the width direction of the circular square tube body.

3. The optical module according to claim 2, wherein a height of a first end of the reflective surface of the first optical filter is greater than a height of a second end of the reflective surface of the first optical filter, so that the optical signal is emitted obliquely toward the second end of the reflective surface of the first optical filter along a width direction of the circular square tube body after being reflected by the reflective surface of the first optical filter.

4. A light module as recited in claim 3, wherein the height of the reflective surface of the first filter is gradually reduced along the width direction of the circular square tube such that the height of the first end of the reflective surface of the first filter is greater than the height of the second end of the reflective surface of the first filter.

5. The optical module of claim 1, wherein the angle of inclination of the reflective surface of the first optical filter and the offset of the light receiving chip are in a first predetermined relationship, so that the light is coupled into the light receiving chip after being reflected by the reflective surface of the first optical filter.

6. The optical module of claim 5, wherein the reflecting surface of the first filter has an inclination angle of 3 ° to 8 °.

7. The optical module of claim 1, wherein the optical assembly further comprises a second filter positioned between the first filter and the light receiving member, the second filter being coaxial with the first lens, the second filter for filtering out light at wavelengths other than the wavelength of received light.

8. An optical module, comprising:

A fiber optic adapter;

An optical emission part for emitting an optical signal;

9. The optical module of claim 8, wherein the angle of inclination of the reflective surface of the first optical filter and the offset of the light receiving chip are in a first predetermined relationship, so that the light is coupled into the light receiving chip after being reflected by the reflective surface of the first optical filter.

10. The light module of claim 9 wherein the angle of inclination of the reflective surface of the first filter is 3 ° to 8 °.