Optical module

Abstract

An optical module (200) comprises a tube body (910), a light emitting component (400), a light receiving component (500) and an optical assembly (920). The optical assembly (920) is located in the tube body (910); the light emitting component (400) and the light receiving component (500) are both connected to the tube body (910); the light emitting component (400) is used for emitting emitted light; and the light receiving component (500) is used for receiving first reflected light. A receiving tube cap (502) of the light receiving component (500) is provided with a first lens (501); a light blocking member (950) covers the first lens (501); the light blocking member (950) is provided with a first light through hole (951); the optical assembly (920) comprises a light processing member; the light processing member is located on a light exit path of second reflected light and is configured to process the second reflected light; the tube body (910) is provided with an extinction cavity; and the extinction cavity is in communication with an inner cavity of the tube body (910) by means of a third light through hole (908). An extinction member is attached to the inner wall of the extinction cavity, and an isolation member (924) is provided at the third light through hole (908).

Description

optical modules

[0001] This application claims the priority of application number 202410542935.6 filed with the China Patent Office on April 30, 2024; the priority of application number 202420940286.0 filed with the China Patent Office on April 30, 2024; the priority of application number 202321911469.1 filed with the China Patent Office on July 20, 2023; and the priority of application number 202321923111.0 filed with the China Patent Office on July 20, 2023; all of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the field of optical fiber communication technology, and in particular to an optical module. Background Art

[0003] With the widespread adoption of fiber-optic broadband networks, operators are increasingly demanding intelligent network monitoring capabilities. Consequently, most optical modules now incorporate built-in OTDR (Optical Time Domain Reflectometer) functionality. This technology monitors the performance of the fiber under test to identify events such as splices, connectors, or breaks. An optical module with OTDR functionality uses an optical transmitter to transmit light to the fiber under test. This light is reflected by the fiber itself and various characteristic points to form a first reflected light beam. This first reflected light beam is then coupled into an optical receiver, which converts it into an electrical signal. This electrical signal is then used to monitor the performance of the fiber under test and identify events such as splices, connectors, or breaks.

[0004] Summary of the Invention

[0005] The present disclosure provides an optical module, comprising:

[0006] An optical transceiver component configured to transmit and receive optical signals; a fiber optic adapter optically connected to the optical transceiver component, the fiber optic adapter comprising a fiber optic ferrule, the fiber optic ferrule being tilted, with a central axis of the fiber optic ferrule forming a second preset angle with a light emission direction of the optical transceiver component; an optical fiber end face of the fiber optic ferrule being tilted, with a first preset angle formed between the optical fiber end face and a vertical plane, the first preset angle being greater than the second preset angle;

[0007] Wherein, the optical transceiver component includes:

[0008] The tube body has a light-extinction cavity; the light-extinction cavity is connected to the inner cavity of the tube body through a light-through hole;

[0009] a light emitting component, disposed opposite to the optical fiber adapter and connected to the tube body, configured to emit emitted light; the emitted light is incident on the optical fiber through the optical fiber adapter and reflected within the optical fiber to form a first reflected light;

[0010] An optical component is placed in the tube body; the optical component includes:

[0011] a filter located in the inner cavity of the tube body and between the light emitting component and the optical fiber adapter; and configured to reflect and transmit the emitted light and the first reflected light;

[0012] an isolator, located at the light-through hole and on a reflected light path of the emitted light reflected by the filter, and configured to reduce crosstalk light returning from the extinction cavity to the inner cavity of the tube body;

[0013] a matte element mounted on an inner wall of the matte cavity and configured to reduce crosstalk light incident on the matte element, wherein the crosstalk light includes reflected light formed after the emitted light is reflected at the filter;

[0014] an optical processing component, located on a reflected light path of the emitted light reflected by the optical fiber end face, and configured to absorb a second reflected light formed by the emitted light reflected by the optical fiber end face;

[0015] A light receiving component is arranged opposite to the extinction cavity, connected to the tube body, and configured to receive the first reflected light; the light receiving component has a receiving tube cap, the receiving tube cap is provided with a first lens, the outer cover of the first lens is provided with a light blocking member, the light blocking member has a first light hole, the first light hole is located on the reflected light path of the first reflected light reflected by the filter, so as to allow the first reflected light to be incident on the light receiving component after being reflected by the filter; the optical processing component is configured to prevent the second reflected light from being incident on the first light hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] FIG1 is a partial structural diagram of an optical communication system according to some embodiments of the present disclosure;

[0018] FIG2 is a partial structural diagram of a host computer according to some embodiments of the present disclosure;

[0019] FIG3 is a structural diagram of an optical module provided according to some embodiments of the present disclosure;

[0020] FIG4 is an exploded view of an optical module according to some embodiments of the present disclosure;

[0021] FIG5 is an assembly diagram of an optical transceiver component and an optical fiber adapter according to some embodiments of the present disclosure;

[0022] FIG6 is an exploded view of an optical transceiver component and an optical fiber adapter according to some embodiments of the present disclosure;

[0023] FIG7 is an assembly diagram of a light receiving component and a light blocking member according to some embodiments of the present disclosure;

[0024] FIG8 is an exploded view of a light receiving component and a light blocking member according to some embodiments of the present disclosure;

[0025] FIG9 is a cross-sectional view of a light receiving component and a light blocking member according to some embodiments of the present disclosure;

[0026] FIG10 is a cross-sectional view of a fiber optic adapter according to some embodiments of the present disclosure;

[0027] FIG11 is a light path diagram of a first reflected light according to some embodiments of the present disclosure;

[0028] FIG12 is another cross-sectional view of a fiber optic adapter in an optical module according to some embodiments of the present disclosure;

[0029] FIG13 is an exploded view of a tube body and a second adjustment sleeve according to some embodiments of the present disclosure;

[0030] FIG14 is a structural diagram of a tube body provided according to some embodiments of the present disclosure;

[0031] FIG15 is a structural diagram of a tube body provided in accordance with some embodiments of the present disclosure from another perspective;

[0032] FIG16 is a cross-sectional view of a tube body and a fiber optic adapter according to some embodiments of the present disclosure;

[0033] FIG17 is a cross-sectional view of an optical assembly and a light blocking member according to some embodiments of the present disclosure;

[0034] FIG18 is a structural diagram of an isolation member provided according to some embodiments of the present disclosure;

[0035] FIG19 is a structural diagram of a first light absorbing member according to some embodiments of the present disclosure;

[0036] FIG20 is a cross-sectional view of a tube according to some embodiments of the present disclosure;

[0037] FIG21 is a cross-sectional view of a tube provided in accordance with some embodiments of the present disclosure from another perspective;

[0038] FIG22 is a cross-sectional view of a tube body and an optical assembly according to some embodiments of the present disclosure;

[0039] FIG23 is a cross-sectional view of an optical transceiver component and an optical fiber adapter according to some embodiments of the present disclosure;

[0040] FIG24 is a light path diagram of an optical transceiver component according to some embodiments of the present disclosure;

[0041] FIG25 is a partial structural diagram of an optical transceiver component in an optical module according to some embodiments of the present disclosure;

[0042] FIG26 is a first cross-sectional view of a tube body in an optical module according to some embodiments of the present disclosure;

[0043] FIG27 is a second cross-sectional view of a tube body in an optical module according to some embodiments of the present disclosure;

[0044] FIG28 is a structural diagram of a light absorbing sheet support in an optical module according to some embodiments of the present disclosure;

[0045] FIG29 is a first cross-sectional view of an optical transceiver component in an optical module according to some embodiments of the present disclosure;

[0046] FIG30 is a first structural diagram of a filter in an optical module according to some embodiments of the present disclosure;

[0047] FIG31 is a partial cross-sectional view 1 of an optical transceiver component in an optical module according to some embodiments of the present disclosure;

[0048] FIG32 is a second structural diagram of a filter in an optical module according to some embodiments of the present disclosure;

[0049] FIG33 is a second cross-sectional view of an optical transceiver component in an optical module according to some embodiments of the present disclosure;

[0050] FIG34 is a second partial cross-sectional view of an optical transceiver component in an optical module according to some embodiments of the present disclosure;

[0051] FIG35 is a third structural diagram of a filter in an optical module according to some embodiments of the present disclosure;

[0052] FIG36 is a third cross-sectional view of an optical transceiver component in an optical module according to some embodiments of the present disclosure;

[0053] FIG37 is a third partial cross-sectional view of an optical transceiver component in an optical module according to some embodiments of the present disclosure;

[0054] FIG38 is a partial cross-sectional view 4 of an optical transceiver component in an optical module according to some embodiments of the present disclosure;

[0055] FIG39 is a first cross-sectional view of an optical transceiver component in an optical module according to some embodiments of the present disclosure;

[0056] FIG40 is a first structural diagram of a light reflection assembly in an optical module according to some embodiments of the present disclosure;

[0057] FIG41 is an exploded view of a light reflection assembly in an optical module according to some embodiments of the present disclosure;

[0058] FIG42 is a structural diagram of a lens support in an optical module according to some embodiments of the present disclosure;

[0059] FIG43 is a side view of a lens holder in an optical module according to some embodiments of the present disclosure;

[0060] FIG44 is a structural diagram of a converging lens in an optical module according to some embodiments of the present disclosure;

[0061] FIG45 is a partial cross-sectional view 1 of an optical transceiver component in an optical module according to some embodiments of the present disclosure;

[0062] FIG46 is a second structural diagram of a light reflection assembly in an optical module according to some embodiments of the present disclosure;

[0063] FIG47 is a side view of a light reflecting assembly in an optical module according to some embodiments of the present disclosure;

[0064] FIG48 is a second partial cross-sectional view of the optical transceiver component in the optical module according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0065] Some embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. However, the embodiments described are only some of the embodiments of the present disclosure, not all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided in the present disclosure are within the scope of protection of the present disclosure.

[0066] Unless the context requires otherwise, throughout the specification and claims, the term "including" is to be interpreted as open and inclusive, that is, "including, but not limited to"; the terms "first" and "second" are not to be understood as indicating or implying relative importance or indicating an upper limit on quantity; the term "plurality" means two or more; the term "connected" is to be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, or an integral connection, and can be directly connected or indirectly connected through an intermediate medium; the use of the terms "suitable for" or "configured to" means open and inclusive language, which does not exclude equipment that is suitable for or configured to perform additional tasks or steps; terms such as "parallel", "perpendicular", "same", "consistent", "level" and so on are not limited to absolute mathematical theoretical relationships, but also include acceptable error ranges generated in practice, and also include differences based on the same design concept but due to manufacturing reasons.

[0067] In optical communication technology, to establish information transmission between information processing devices, it is necessary to load the information onto light and use the propagation of light to achieve information transmission. Here, the light loaded with information is an optical signal. When transmitting optical signals within information transmission equipment, they can reduce optical power loss, thereby enabling high-speed, long-distance, and low-cost information transmission. The signals that information processing equipment can recognize and process are electrical signals. Information processing equipment typically includes optical network units (ONUs), gateways, routers, switches, mobile phones, computers, servers, tablets, televisions, etc., and information transmission equipment typically includes optical fibers and optical waveguides.

[0068] Optical modules can convert optical signals into electrical signals between information processing devices and information transmission devices. For example, at least one of the optical signal input or output ends of an optical module is connected to an optical fiber, and at least one of the electrical signal input or output ends of the optical module is connected to an optical network terminal. A first optical signal from the optical fiber is transmitted to the optical module, which converts the first optical signal into a first electrical signal and transmits the first electrical signal to the optical network terminal. A 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. Because multiple information processing devices can transmit information via electrical signals, at least one of the multiple information processing devices needs to be directly connected to the optical module, rather than all of them. Here, the information processing device directly connected to the optical module is referred to as the optical module's host computer. Furthermore, the optical signal input or output end of the optical module can be referred to as an optical port, and the electrical signal input or output end of the optical module can be referred to as an electrical port.

[0069] Figure 1 is a partial structural diagram of an optical communication system according to some embodiments of the present disclosure. As shown in Figure 1 , the optical communication system mainly includes a remote information processing device 1000, a local information processing device 2000, a host computer 100, an optical module 200, an optical fiber 101, and a network cable 103.

[0070] One end of optical fiber 101 extends toward remote information processing device 1000, and the other end of optical fiber 101 is connected to optical module 200 through the optical port of optical module 200. Optical signals can be totally reflected in optical fiber 101, and the propagation of the optical signal in the direction of total reflection can almost maintain the original optical power. The optical signal undergoes multiple total reflections in optical fiber 101 to transmit the optical signal from remote information processing device 1000 to optical module 200, and vice versa, thereby achieving long-distance, low-power information transmission.

[0071] The optical communication system may include one or more optical fibers 101, and the optical fibers 101 may be detachably connected or fixedly connected to the optical module 200. The host computer 100 is configured to provide data signals to the optical module 200, receive data signals from the optical module 200, or monitor or control the operating status of the optical module 200.

[0072] The host computer 100 includes a substantially rectangular housing and an optical module interface 102 disposed on the housing. The optical module interface 102 is configured to connect to the optical module 200 to establish a unidirectional or bidirectional electrical signal connection between the host computer 100 and the optical module 200.

[0073] The host computer 100 also includes an external electrical interface that can access an electrical signal network. For example, the external electrical interface includes a Universal Serial Bus (USB) interface or a network cable interface 104. The network cable interface 104 is configured to access a network cable 103 so that the host computer 100 establishes a unidirectional or bidirectional electrical signal connection with the network cable 103. One end of the network cable 103 is connected to the local information processing device 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 device 2000 and the host computer 100 via the network cable 103. For example, a third electrical signal emitted by the local information processing device 2000 is transmitted to the host computer 100 via the network cable 103. The host computer 100 generates a second electrical signal based on the third electrical signal. The second electrical signal from the host computer 100 is transmitted to the optical module 200. The optical module 200 converts the second electrical signal into a second optical signal and transmits the second optical signal to the optical fiber 101. The second optical signal is then transmitted to the remote information processing device 1000 via the optical fiber 101. For example, a first optical signal from the remote information processing device 1000 is transmitted 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 based on the first electrical signal and transmits the fourth electrical signal to the local information processing device 2000. It should be noted that optical modules are tools for converting optical signals into electrical signals. During this conversion process, the information does not change, but the encoding and decoding methods of the information can change.

[0074] In addition to the optical network terminal, the host computer 100 also includes an optical line terminal (OLT), an optical network device (ONT), or a data center server.

[0075] FIG2 is a partial structural diagram of a host computer provided according to some embodiments of the present disclosure. In order to clearly illustrate the connection relationship between the optical module 200 and the host computer 100, FIG2 only shows the structure of the host computer 100 related to the optical module 200. As shown in FIG2, the host computer 100 also includes a PCB circuit board 105 disposed within the housing, a cage 106 disposed on the surface of the PCB circuit board 105, a heat sink 107 disposed on the cage 106, and an electrical connector disposed within the cage 106. The electrical connector is configured to connect to the electrical port of the optical module 200; the heat sink 107 has a protruding structure such as fins that increase the heat dissipation area.

[0076] The optical module 200 is inserted into the cage 106 of the host computer 100. The cage 106 secures the optical module 200. Heat generated by the optical module 200 is transferred to the cage 106 and then dissipated through the heat sink 107. After the optical module 200 is inserted into the cage 106, the electrical port of the optical module 200 connects with the electrical connector inside the cage 106, thereby establishing a bidirectional electrical signal connection between the optical module 200 and the host computer 100. Furthermore, the optical port of the optical module 200 connects to the optical fiber 101, thereby establishing a bidirectional optical signal connection between the optical module 200 and the optical fiber 101.

[0077] Figure 3 is a structural diagram of an optical module according to some embodiments of the present disclosure, and Figure 4 is an exploded view of an optical module according to some embodiments of the present disclosure. As shown in Figures 3 and 4, the optical module 200 includes a housing, a circuit board 300 disposed within the housing, and an optical transceiver component 900.

[0078] The housing includes an upper housing 201 and a lower housing 202 . The upper housing 201 covers the lower housing 202 to form the housing having two openings 204 and 205 . The outer contour of the housing is generally a square.

[0079] In some embodiments, the lower shell 202 includes a base plate 2021 and two lower side plates 2022 located on both sides of the base plate 2021 and arranged perpendicular to the base plate 2021; the upper shell 201 includes a cover plate 2011, and the cover plate 2011 covers the two lower side plates 2022 of the lower shell 202 to form the above-mentioned shell.

[0080] In some embodiments, the lower shell 202 includes a base plate 2021 and two lower side plates 2022 located on both sides of the base plate 2021 and arranged perpendicularly to the base plate 2021; the upper shell 201 includes a cover plate 2011 and two upper side plates located on both sides of the cover plate 2011 and arranged perpendicularly to the cover plate 2011. The two upper side plates are combined with the two lower side plates 2022 to achieve the upper shell 201 covering the lower shell 202.

[0081] The direction of the line connecting the two openings 204 and 205 can be consistent with the length of the optical module 200, or it can be inconsistent with the length of the optical module 200. For example, opening 204 is located at the end of the optical module 200 (the right end in Figure 3), and opening 205 is also located at the end of the optical module 200 (the left end in Figure 3). Alternatively, opening 204 is located at the end of the optical module 200, while opening 205 is located on the side of the optical module 200. Opening 204 is an electrical port, from which the gold finger of the circuit board 300 extends and is inserted into the electrical connector of the host computer 100; opening 205 is an optical port, configured to receive an external optical fiber 101, so that the optical fiber 101 can connect to the optical transceiver component 900 in the optical module 200.

[0082] The combined assembly of the upper housing 201 and the lower housing 202 facilitates the installation of the circuit board 300, the optical transmitter 400, the optical receiver 500, and the like within the housing. The upper housing 201 and the lower housing 202 provide encapsulation and protection for these components. Furthermore, during assembly of the circuit board 300, the optical transmitter and receiver 900, and the like, the positioning components, heat dissipation components, and electromagnetic shielding components of these components are easily positioned, facilitating automated production.

[0083] In some embodiments, the upper shell 201 and the lower shell 202 are made of metal materials, which facilitates electromagnetic shielding and heat dissipation.

[0084] In some embodiments, the optical module 200 further includes an unlocking component 600 located outside its housing. The unlocking component 600 is configured to achieve a fixed connection between the optical module 200 and the host computer, or to release the fixed connection between the optical module 200 and the host computer.

[0085] For example, the unlocking component 600 is located on the outside of the two lower side panels 2022 of the lower housing 202 and includes a snap-fit ​​component that mates with the cage 106 of the host computer 100. When the optical module 200 is inserted into the cage 106, the snap-fit ​​component of the unlocking component 600 secures the optical module 200 in the cage 106. When the unlocking component 600 is pulled, the snap-fit ​​component of the unlocking component 600 moves accordingly, thereby changing the connection between the snap-fit ​​component and the host computer, thereby releasing the optical module 200 from the cage 106 and allowing the optical module 200 to be removed from the cage 106.

[0086] The circuit board 300 includes circuit traces, electronic components, and chips. The electronic components and chips are connected according to the circuit design through the circuit traces to achieve functions such as power supply, electrical signal transmission, and grounding. Electronic components may include, for example, capacitors, resistors, transistors, and metal-oxide-semiconductor field-effect transistors (MOSFETs). Chips may include, for example, microcontroller units (MCUs), laser driver chips, transimpedance amplifiers (TIAs), limiting amplifiers (LIAs), clock and data recovery chips (CDRs), power management chips, and digital signal processing (DSP) chips.

[0087] The circuit board 300 is generally a rigid circuit board. Due to its relatively hard material, the rigid circuit board can also realize the load-bearing function. For example, the rigid circuit board can stably carry the above-mentioned electronic components and chips; the rigid circuit board can also be inserted into the electrical connector in the cage 106 of the host computer 100.

[0088] The circuit board 300 also includes a gold finger formed on the surface of its end, and the gold finger is composed of a plurality of independent pins. The circuit board 300 is inserted into the cage 106, and the gold finger is connected to the electrical connector in the cage 106. The gold finger can be set only on the surface of one side of the circuit board 300 (for example, the upper surface shown in Figure 4), or it can be set on the upper and lower surfaces of the circuit board 300 to provide a larger number of pins, thereby adapting to occasions where a large number of pins are required. The gold finger is configured to establish an electrical connection with the host computer to achieve power supply, grounding, two-wire synchronous serial (Inter-Integrated Circuit, I2C) signal transmission, data signal transmission, etc. Of course, flexible circuit boards are also used in some optical modules. Flexible circuit boards are generally used in conjunction with rigid circuit boards to supplement rigid circuit boards.

[0089] In some embodiments, the optical transceiver component 900 is physically separated from the circuit board 300 and then electrically connected via a flexible circuit board or an electrical connector.

[0090] In some embodiments, the optical transceiver component 900 may be directly disposed on the circuit board 300. For example, the optical transceiver component 900 may be disposed on a surface of the circuit board 300 or on a side of the circuit board 300.

[0091] The optical module can have multiple functions, such as an optical time domain reflectometer (OTDR) function. The optical transceiver component 900 is connected to the optical fiber adapter 700, and the optical fiber adapter 700 is connected to the external optical fiber. The optical transmitting component 400 of the optical transceiver component 900 transmits an optical signal into the optical fiber 101. When the optical signal is transmitted in the optical fiber 101, due to optical link abnormalities such as the properties of the optical fiber itself, the connector, interruption or bending, the optical signal is scattered and reflected in the optical fiber 101. Part of the scattered light and reflected light signals will return to the optical receiving component. The optical receiving component determines whether there is an abnormality in the optical link based on the time domain characteristics of the received scattered light signals and reflected light signals.

[0092] Figure 5 is an assembly diagram of an optical transceiver component and a fiber optic adapter according to some embodiments of the present disclosure. Figure 6 is an exploded view of an optical transceiver component and a fiber optic adapter according to some embodiments of the present disclosure. As shown in Figures 5 and 6, in some embodiments, the optical transceiver component 900 may include a light emitting component 400. The light emitting component 400 may include a laser chip. The laser chip may be used to transmit an optical signal, so that the light emitting component 400 can transmit an optical signal. For example, the light emitting component 400 is used to emit light.

[0093] As shown in Figures 5 and 6, in some embodiments, the optical transceiver component 900 may include an optical receiving component 500. The optical receiving component 500 may have an optical receiving chip. The optical receiving chip may be used to receive an optical signal, so that the optical receiving component 500 can receive the optical signal. For example, the optical receiving component 500 is used to receive the first reflected light.

[0094] In some embodiments, at least one of the light emitting component 400 or the light receiving component 500 may be located on a side of the circuit board 300 away from the gold finger.

[0095] In some embodiments, the light emitting component 400 and the light receiving component 500 can be physically separated from the circuit board 300 and then electrically connected to the circuit board 300 through corresponding flexible circuit boards or electrical connectors.

[0096] In some embodiments, at least one of the light emitting component or the light receiving component may be directly disposed on the circuit board 300. For example, at least one of the light emitting component or the light receiving component may be disposed on a surface of the circuit board 300 or a side of the circuit board 300.

[0097] As shown in Figures 5 and 6, in some embodiments, a fiber optic adapter 700 may be provided in the housing of the optical module 200. One end of the fiber optic adapter 700 may be connected to the optical fiber 101 to receive optical signals transmitted by the optical fiber 101 and transmit optical signals to the optical fiber 101.

[0098] As shown in Figures 5 and 6, in some embodiments, the optical transceiver component 900 may include a tube body (in some examples, it may also be called a square tube body) 910. The optical emitting component 400 may be inserted into the tube body 910 so that the optical signal emitted by the optical emitting component 400 can be transmitted within the tube body 910. The optical receiving component 500 may be inserted into the tube body 910 so that the optical receiving component 500 can receive the optical signal transmitted within the tube body 910. The optical fiber adapter 700 may be inserted into the tube body 910 to receive the optical signal transmitted through the tube body 910. The optical fiber adapter 700 may be inserted into the tube body 910 to transmit the optical signal transmitted by the optical fiber 101 to the tube body 910 and to transmit the optical signal within the tube body 910 to the optical fiber 101.

[0099] As shown in Figures 5 and 6, in some embodiments, the optical transceiver component 900 may include an optical assembly 920. The optical assembly 920 may be configured to transmit the optical signal emitted by the optical emitting component 400 to the optical fiber adapter 700, and may also be configured to transmit the optical signal in the optical fiber adapter 700 to the optical receiving component 500.

[0100] In some embodiments, the optical transceiver component 900 is a transmitting and receiving component. When the optical transceiver component 900 is a traditional optical transceiver component, the optical transmitting component 400 generates transmitted light of one wavelength, and the optical receiving component 500 receives received light of another wavelength. The transmitted light may also be incident on the optical receiving component 500, causing crosstalk to the optical receiving component 500. However, when the optical transceiver component 900 is working normally, received light will be incident, and the intensity of the received light is relatively large. The intensity of the crosstalk light generated by the transmitted light is relatively small, and the crosstalk light on the received light is particularly small, and will not affect the receiving sensitivity of the received light.

[0101] However, when the optical transceiver component 900 uses the OTDR function to detect the optical fiber, the optical transmitting component 400 generates a wavelength of transmitted light. When the optical transceiver component 900 is operating normally, no received light is emitted. Only when an abnormality such as a breakpoint occurs in the optical fiber, the transmitted light in the optical fiber 101 is scattered and reflected within the optical fiber 101 to generate a first reflected light (in some examples, also referred to as the first OTDR reflected light). The first reflected light is emitted into the optical transceiver component 900, and the optical receiving component 500 receives the first reflected light of the optical fiber. If the optical transceiver component 900 is operating normally, because the wavelength of the transmitted light emitted by the optical transmitting component 400 is the same as the wavelength of the first reflected light, the crosstalk light generated by the transmitted light may enter the optical receiving component 500. At this time, the crosstalk light will cause signal crosstalk, and technicians will mistakenly determine that there is an abnormality in the optical fiber, affecting the OTDR function of the optical module.

[0102] To address this issue, in some embodiments, the optical assembly 920 may include an isolator to isolate crosstalk light. Alternatively, the optical assembly 920 may include a light-eliminating element to eliminate crosstalk light from the tube 910. Alternatively, the optical assembly 920 may include a light-processing element to process the crosstalk light. Alternatively, a light-blocking element 950 may be provided outside the light receiving component 500 to block crosstalk light.

[0103] Figure 7 is an assembly diagram of a light receiving component and a light blocking member according to some embodiments of the present disclosure. Figure 8 is an exploded view of a light receiving component and a light blocking member according to some embodiments of the present disclosure. Figure 9 is a cross-sectional view of a light receiving component and a light blocking member according to some embodiments of the present disclosure. Referring to Figures 7, 8, and 9, in some embodiments, the light receiving component 500 may include a receiver socket 503. A light receiving chip may be disposed on the receiver socket 503. The light receiving chip is used to receive optical signals.

[0104] In some embodiments, the wavelength of the optical signal emitted by the optical emitting component 400 is the same as the wavelength of the optical signal received by the optical receiving component 500. For example, the wavelength of the emitted light emitted by the optical emitting component 400 and the first reflected light received by the optical receiving component 500 are the same.

[0105] 7 , 8 , and 9 , in some embodiments, the optical receiving component 500 may include a receiving pin 504. One end of the receiving pin 504 may be connected to the circuit board 300 via a flexible circuit board. The other end of the receiving pin 504 may pass through the receiving socket 503 to connect to the electronic components on the receiving socket 503.

[0106] 7, 8, and 9, in some embodiments, the optical receiving component 500 may include a receiving cap 502. A first end of the receiving cap 502 may be connected to the top surface of a tube base 503. A first lens 501 may be provided at a second end of the receiving cap 502. The first lens 501 may be a focusing lens, so that the optical signal within the tube body 911 is focused onto the optical receiving chip via the first lens 501.

[0107] As shown in Figures 7, 8, and 9, in some embodiments, a light blocking member 950 may be provided on the receiving tube cap 502. The light blocking member 950 may be disposed over the first lens 501 to prevent crosstalk light from entering the first lens 501. The light blocking member 950 may have a first light hole 951, so that the optical signal within the tube body 911 is incident on the first lens 501 through the first light hole 951 of the light blocking member 950. For example, the first reflected light is incident on the first lens 501 through the first light hole 951 of the light blocking member 950.

[0108] In some embodiments, the light blocking member 950 and the receiving tube cap 502 are connected by glue, so that the light blocking member 950 and the receiving tube cap 502 are fixedly connected.

[0109] In some examples, the light blocking member 950 and the receiving tube cap 502 may be welded to securely connect the light blocking member 950 and the receiving tube cap 502 .

[0110] In some examples, the light blocking member 950 and the receiving tube cap 502 may be an integral part.

[0111] 7 , 8 , and 9 , in some embodiments, the light blocking member 950 may include a first light blocking portion 952 . A first end of the first light blocking portion 952 may be connected to the receiving tube cap 502 .

[0112] In some embodiments, the size of the first light-blocking portion 952 is larger than the size of the first lens 501 to block the optical signal in the tube body 911 from being incident on the first lens 501 through the first light-blocking portion 952. For example, the size of the first light-blocking portion 952 is larger than the size of the first lens 501 to block the crosstalk light in the tube body 911 from being incident on the first lens 501 through the first light-blocking portion 952.

[0113] 7 , 8 , and 9 , in some embodiments, the light blocking member 950 may include a second light blocking portion 953 . The second light blocking portion 953 may be connected to the second end of the first light blocking portion 952 . The second light blocking portion 953 may have a first light through hole 951 .

[0114] In some embodiments, the size of the light-through hole formed by the first light-blocking portion 952 can be greater than or equal to the size of the first light-through hole 951, so as to prevent crosstalk light within the tube body 911 from being incident on the first lens 501 through the area of ​​the second light-blocking portion 953 other than the first light-through hole 951. For example, the radius of the light-through hole formed by the first light-blocking portion 952 can be greater than or equal to the radius of the first light-through hole 951.

[0115] Figure 10 is a cross-sectional view of a fiber optic adapter according to some embodiments of the present disclosure. As shown in Figure 10 , in some embodiments, a fiber optic adapter 700 may include a fiber optic ferrule 704. Fiber optic ferrule 704 may interface with the fiber optic ferrule of optical fiber 101 to couple optical signals within and outside the optical module.

[0116] In some embodiments, the optical fiber end face of the optical fiber ferrule 704 is an inclined surface, that is, the first preset angle between the optical fiber end face of the optical fiber ferrule 704 and the vertical plane is non-0°, so that the reflection direction of the emitted light incident on the optical fiber end face deviates from the incident direction of the emitted light, thereby reducing the emitted light after reflection from the optical fiber end face returning along the original path.

[0117] In some embodiments, the vertical distance between the upper end of the fiber end face of the optical fiber ferrule 704 and the end of the optical fiber ferrule 704 is greater than the vertical distance between the lower end of the optical fiber end face of the optical fiber ferrule 704 and the end of the optical fiber ferrule 704, so that the optical fiber ferrule 704 tilts downward along the vertical plane toward the end of the optical fiber ferrule 704. As shown in FIG10 , the optical fiber ferrule 704 tilts downward and right along the vertical plane.

[0118] In some embodiments, the first preset angle between the optical fiber end face of the optical fiber ferrule 704 and the vertical plane is 8° to 12°. For example, the first preset angle between the optical fiber end face of the optical fiber ferrule 704 and the vertical plane is 8° to 10°, and the first preset angle between the optical fiber end face of the optical fiber ferrule 704 and the vertical plane is 11° to 12°.

[0119] As shown in FIG10 , in some embodiments, a fiber optic adapter 700 may include a connecting sleeve 701 . A fiber optic ferrule 704 may be disposed in the connecting sleeve 701 .

[0120] As shown in FIG10 , in some embodiments, the optical fiber adapter 700 may include an outer sleeve 702 . One end of the outer sleeve 702 may be inserted into the connecting sleeve 701 , so that the outer sleeve 702 and the connecting sleeve 701 are connected.

[0121] As shown in FIG10 , in some embodiments, a fiber optic adapter 700 may include an inner sleeve 703. The inner sleeve 703 may be disposed within an outer sleeve 702. A first end of a fiber optic ferrule 704 may be inserted into an area of ​​the connector sleeve 701 that is not within the inner sleeve 703. A second end of the fiber optic ferrule 704 may be inserted into the inner sleeve 703.

[0122] As shown in FIG. 10 , in some embodiments, the optical fiber ferrule 704 and the connecting sleeve 701 may be arranged horizontally.

[0123] Since the optical fiber ferrule 704 and the tube body 910 cannot be directly connected, a connector can be provided between the optical fiber ferrule 704 and the tube body 910 to connect the tube body 910 and the optical fiber ferrule 704 .

[0124] In some embodiments, the connector may be a connecting sleeve 701 .

[0125] FIG11 is a light path diagram of the first reflected light provided according to some embodiments of the present disclosure. FIG11 (1) shows a case where the side of the tube body 910 facing away from the light emitting component 400 is not tilted or the optical fiber ferrule and the connector are not tilted, and FIG11 (2) shows a case where the side of the tube body 910 facing away from the light emitting component 400 is tilted or the optical fiber ferrule and the connector are tilted. α is the tilt angle of the optical fiber end face, i.e., the first preset angle; β is the tilt angle of the side of the tube body 910 facing away from the light emitting component 400, or the tilt angle of the optical fiber ferrule, i.e., the second preset angle.

[0126] As shown in Figure 11, the law of refraction: n 光纤 *sinα=n 空气 *sin(α+β), according to the law of refraction and the tilt angle of the optical fiber end face, the tilt angle of the first end face, or the tilt angle between the optical fiber ferrule and the connector can be obtained.

[0127] The second preset relationship between the first preset angle and the second preset angle is: n 光纤 *sinα=n 空气 *sin(α+β).

[0128] As shown in FIG11 , the tube body 910 is tilted on one side facing away from the light emitting component 400 or the optical fiber ferrule and the connector are tilted, and the tilt angle of the optical fiber end face of the optical fiber ferrule 704 is increased from a first angle to a second angle, so that the direction of the first reflected light entering the tube body 910 through the optical fiber end face changes from tilted upward to horizontal.

[0129] According to the principle of optical path reversibility, when the emitted light is incident horizontally on the fiber end face, the incident angle of the emitted light on the fiber end face and the receiving angle of the fiber end face have a large overlap, and the coupling efficiency is also high.

[0130] In order to allow the first reflected light to enter the tube body 910 in a horizontal direction through the optical fiber end face, in some embodiments, the optical fiber ferrule 704 can be arranged obliquely with respect to the connector.

[0131] Since the first preset angle is 8° to 12°, according to the law of refraction, the second preset angle may be 3.7° to 5.8°.

[0132] In order to increase the tilt angle of the fiber end face of the fiber ferrule 704 , in some embodiments, the tilt direction of the fiber ferrule 704 and the connector is different from the tilt direction of the fiber end face of the fiber ferrule 704 .

[0133] In order to allow the first reflected light to enter the tube body 910 in a horizontal direction through the optical fiber end face, in some embodiments, the surface of the tube body 910 facing away from the light emitting component 400 can be an inclined surface. That is, the second predetermined angle between the surface of the tube body 910 facing away from the light emitting component 400 and the vertical plane is non-0°.

[0134] The side of the tube body 910 facing away from the light emitting component 400 is a slope, the central axis of the connector is tilted to the upper right, the central axis of the optical fiber ferrule 704 is tilted to the upper right, and the inclination angle of the optical fiber end face of the optical fiber ferrule 704 increases from the first angle to the second angle, so that the direction of the first reflected light entering the tube body 910 through the optical fiber end face changes from tilted upward to horizontal.

[0135] In some embodiments, the second preset angle between the surface of the tube body 910 facing away from the light emitting component 400 and the vertical plane (i.e., the inclination angle of the surface of the tube body 910 facing away from the light emitting component 400) can be 3.7° to 5.8°. For example, the second preset angle between the surface of the tube body 910 facing away from the light emitting component 400 and the vertical plane is 3.7° to 4.5°, and the second preset angle between the surface of the tube body 910 facing away from the light emitting component 400 and the vertical plane is 4.6° to 5.8°.

[0136] To increase the tilt angle of the fiber end face of the fiber ferrule 704 , in some embodiments, the tilt direction of the side of the tube 910 facing away from the light emitting component 400 is the same as the tilt direction of the fiber end face of the fiber ferrule 704 .

[0137] Figure 12 is another cross-sectional view of a fiber optic adapter in an optical module according to some embodiments of the present disclosure. As shown in Figure 12, in some other examples of the present disclosure, a fiber optic adapter 700 may include a connecting sleeve 701, an outer sleeve 702, an inner sleeve 703, an internal optical fiber 705, and an optical fiber ferrule 704. The connecting sleeve 701 is fixedly connected to the outer sleeve 702, the inner sleeve 703 is fixed to the inner cavity sidewall of the outer sleeve 702, the internal optical fiber 705 is fixed to the inner cavity of the outer sleeve 702 through the inner sleeve 703, the optical fiber ferrule 704 is inserted into the connecting sleeve 701, the light emitting end face of the optical fiber ferrule 704 is connected to the light incident end face of the internal optical fiber 705, and the left end face of the optical fiber ferrule 704 protrudes from the left end face of the connecting sleeve 701.

[0138] When connecting the optical fiber adapter 700 to the square tube body (in some examples, it can also be called a tube body) 910, the left end of the connecting sleeve 701 is inserted into the second adjustment sleeve, and the left end of the optical fiber ferrule 704 is inserted into the third tube opening 903, thereby realizing the connection between the optical fiber adapter 700 and the square tube body 910.

[0139] In some embodiments, the OTDR emission light (in some examples, it may also be referred to as emission light) emitted by the light emitting component 400 is transmitted through the filter 930 to the optical fiber adapter 700. The OTDR emission light is easily reflected at the optical fiber end face (left end face) of the optical fiber ferrule 704. In order to prevent the light reflected at the optical fiber end face from returning to the light emitting component 400 along the original path, the optical fiber end face of the optical fiber ferrule 704 is set to an inclined end face, that is, there is a first preset angle between the optical fiber end face of the optical fiber ferrule 704 and the vertical plane, so that the second OTDR reflected light (in some examples, it may also be referred to as second reflected light) reflected at the optical fiber end face is emitted along other transmission directions, thereby preventing the second OTDR reflected light from returning to the light emitting component 400 along the original path.

[0140] The OTDR emission light emitted by the optical emitting component 400 passes through the optical filter 930 and is emitted into the optical fiber adapter 700. The OTDR emission light is transmitted to the external optical fiber 101 via the optical fiber adapter 700. The first OTDR reflected light of the optical fiber link reflected at each node of the external optical fiber 101 is transmitted from the optical fiber to the optical filter 930. Since the wavelength of the OTDR emission light and the first OTDR reflected light are the same, the optical filter 930 is a semi-transparent and semi-reflective film. Part of the first OTDR reflected light is reflected through the optical filter 930 to the optical receiving component 500, and part of the first OTDR reflected light passes through the optical filter 930 and is emitted into the optical emitting component 400, affecting the luminescence performance of the optical emitting component 400.

[0141] In order to prevent the first OTDR reflected light from passing through the filter 930 and entering the light emitting component 400, the optical fiber ferrule 704 is tilted, that is, there is a second preset angle between the central axis of the optical fiber ferrule 704 and the light emitting direction (left and right direction) of the light emitting component 400, so that there is an angle between the OTDR emitted light and the first OTDR reflected light.

[0142] In some embodiments, the second preset angle between the central axis of the optical fiber ferrule 704 and the light emitting direction of the light emitting component 400 is 3.7° to 5.8°, and the first preset angle between the optical fiber end face of the optical fiber ferrule 704 and the vertical plane is 8° to 12°.

[0143] In some embodiments, the second preset angle is 3.7° and the first preset angle is 8°.

[0144] Figure 13 is an exploded view of the tube body and the second adjustment sleeve provided according to some embodiments of the present disclosure. Figure 14 is a structural diagram of the tube body provided according to some embodiments of the present disclosure. Figure 15 is a structural diagram of the tube body provided according to some embodiments of the present disclosure from another perspective. As shown in Figures 13, 14 and 15, in some embodiments, a second adjustment sleeve 710 may also be provided in the housing of the optical module 200. One end of the second adjustment sleeve 710 can be connected to the tube body 910. The other end of the second adjustment sleeve 710 can be connected to the optical fiber adapter 700. One end of the second adjustment sleeve 710 is connected to the tube body 910, and the other end of the second adjustment sleeve 710 can be connected to the optical fiber adapter 700, so that the optical fiber adapter 700 and the tube body 910 can be connected through the second adjustment sleeve 710.

[0145] In some embodiments, one end surface of the second adjustment sleeve 710 is welded to one end surface of the tube body 910 so that the second adjustment sleeve 710 is fixedly connected to the tube body.

[0146] In some examples, one end surface of the second adjustment sleeve 710 can be bonded to one end surface of the tube body 910 to fix the second adjustment sleeve 710 to the tube body 910 .

[0147] In some examples, the second adjustment sleeve 710 and the tube body 910 may be an integral piece.

[0148] In some embodiments, the fiber optic adapter 700 can be inserted into the other end of the second adjustment sleeve 710 , and the fiber optic adapter 700 is welded to the inner wall of the second adjustment sleeve 710 to securely connect the second adjustment sleeve 710 to the fiber optic adapter 700 .

[0149] In some examples, the fiber optic adapter 700 can be bonded to the inner wall of the second adjustment sleeve 710 so that the second adjustment sleeve 710 and the fiber optic adapter 700 are fixedly connected.

[0150] In some embodiments, the second adjustment sleeve 710 can serve as a connector between the tube body 910 and the optical fiber ferrule 704 .

[0151] In some embodiments, the combination of the second adjustment sleeve 710 and the connecting sleeve 701 can serve as a connector between the tube body 910 and the optical fiber ferrule 704 .

[0152] As shown in Figures 13, 14, and 15, in some embodiments, the tube body 910 may include a first adjustment sleeve 912. A first placement hole may be formed in the first adjustment sleeve 912. The light emitting component 400 may be placed in the first placement hole to connect the light emitting component 400 to the tube body 910.

[0153] In some embodiments, the end surface area of ​​the first adjustment sleeve 912 may be larger than the end surface area of ​​the light emitting component 400 , so that the light emitting component 400 can be inserted into the first adjustment sleeve 912 , thereby connecting the light emitting component 400 to the tube body 910 .

[0154] As shown in Figures 13, 14, and 15, in some embodiments, the tube body 910 may include a tube body 911. The first end of the tube body 911 may be connected to the first adjustment sleeve 912. The first end of the tube body 911 may have a first nozzle. The first nozzle may be connected to the first storage hole so that the emitted light emitted by the light emitting component 400 is transmitted to the tube body 911 through the first storage hole and the first nozzle. The first nozzle may be connected to the inner cavity of the tube body 910 so that the emitted light is incident on the inner cavity of the tube body 910 through the first nozzle.

[0155] In some embodiments, the end surface of the first adjustment sleeve 912 is welded to the first side wall of the tube body 911 so that the first adjustment sleeve 410 is fixedly connected to the tube body 911 .

[0156] In some examples, the first adjustment sleeve 912 can facilitate welding of the light emitting component 400 and the tube body 911 , and can also increase the welding area between the light emitting component 400 and the tube body 911 , thereby increasing welding firmness.

[0157] In some examples, an end surface of the first adjustment sleeve 912 can be bonded to the first side wall of the tube body 911 .

[0158] In some embodiments, the tube body 911 and the first adjustment sleeve 912 may be integrally formed.

[0159] In some embodiments, the second end of the tubular body 911 can be connected to one end of the second adjustment sleeve 710. The second end of the tubular body 911 can have a third port 903. The third port 903 can communicate with the inner cavity of the tubular body 910, allowing optical signals to enter the inner cavity of the tubular body 910 through the third port 903. The third port 903 can also communicate with the second through hole of the second adjustment sleeve 710, allowing optical signals from the tubular body 911 to be transmitted to the fiber optic adapter 700 through the second through hole, and vice versa.

[0160] In some embodiments, the tubular body 911 may have a second orifice 902 in the middle. The second orifice 902 may be located between the first orifice and the third orifice 903. The light receiving component 500 may be inserted into the second orifice 902 to connect the light receiving component 500 to the tubular body 911, thereby enabling the light receiving component 500 to receive optical signals within the tubular body 911. The second orifice 902 may communicate with the inner cavity of the tubular body 910, allowing optical signals within the inner cavity of the tubular body 910 to be incident on the light receiving component 500 through the second orifice 902.

[0161] In some embodiments, the tube body 911 may have an extinction cavity in the middle. The extinction cavity may be connected to the inner cavity of the tube body 910 so that crosstalk light generated by the light emitted in the inner cavity of the tube body 910 can be incident on the extinction cavity. The extinction cavity is arranged opposite to the light receiving component 500 so that the crosstalk light is transmitted in the opposite direction of the light receiving component 500, further reducing the crosstalk light incident on the light receiving component 500. The extinction cavity can be closed or open to the outside. When the extinction cavity is open to the outside, a fourth tube opening 904 can be formed. The fourth tube opening 904 can be arranged opposite to the second tube opening 902. The fourth tube opening 904 can be located between the first tube opening and the third tube opening 903. The fourth tube opening 904 can be connected to the inner cavity of the tube body 910 so that the first crosstalk light in the inner cavity of the tube body 910 can be incident on the fourth tube opening 904.

[0162] As shown in Figures 13, 14, and 15, the tube body 911 may include a first sidewall 9112. The first sidewall 9112 may be located at the second end of the tube body 911. The first sidewall 9112 may be connected to the fiber optic adapter 700. The first sidewall 9112 may have a third tube opening 903.

[0163] In some embodiments, the first sidewall 9112 facing away from the light emitting component 400 is a first end surface, which can be an inclined surface so that the first reflected light is horizontally incident on the tube body 910 through the optical fiber end surface. That is, the second predetermined angle between the first end surface and the vertical plane is non-0°.

[0164] In some embodiments, the second preset angle between the first end surface and the vertical plane may be 3.7° to 5.8°. For example, the second preset angle between the first end surface and the vertical plane is 3.7° to 4.5°, and the second preset angle between the first end surface and the vertical plane is 4.6° to 5.8°.

[0165] As shown in Figures 13, 14, and 15, the tubular body 911 may include a second sidewall 9111. The second sidewall 9111 may be located at a first end of the tubular body 911. The second sidewall 9111 may be disposed opposite the first sidewall 9112. The second sidewall 9111 may be connected to the first adjustment sleeve 912. The second sidewall 9111 may have a first nozzle.

[0166] In some embodiments, the side of the second side wall 9111 facing away from the fiber optic adapter 700 is a second end surface, and the second end surface may be an inclined surface, that is, the fourth preset angle between the second end surface and the vertical plane is non-0°.

[0167] In some embodiments, the fourth preset angle between the second end surface and the vertical plane is 3.7° to 5.8°. For example, the fourth preset angle between the second end surface and the vertical plane is 3.7° to 4.5°, and the fourth preset angle between the second end surface and the vertical plane is 4.6° to 5.8°.

[0168] The optical module is assembled with the optical transceiver 900 and the optical fiber adapter 700 using a coupling welding fixture. After the optical transceiver 900 is rotated counterclockwise from the first orientation (left - second side wall 9111, right - first side wall 9112) to the second orientation (bottom - second side wall 9111, top - first side wall 9112), the second end face of the second side wall 9111 of the tube body 911 is snapped onto the coupling welding fixture.

[0169] If the first end face of the first side wall 9112 and the second end face of the second side wall 9111 are not parallel, to ensure that the second end face of the second side wall 9111 is horizontal in the second placement direction, the coupling welding fixture needs to be beveled to engage the second end face of the second side wall 9111. However, the machining error of the beveled coupling welding fixture is large, resulting in a poor horizontality of the first end face of the first side wall 9112 in the second placement direction. This, in turn, prevents the first end face of the first side wall 9112 and the fiber optic adapter 700 from being perpendicular to each other, thereby affecting the coupling efficiency of the optical signal between the tube body 911 and the fiber optic adapter 700. Therefore, in some embodiments, the angular difference between the second preset angle and the fourth preset angle can be equal to 0°, so that the second end face of the second side wall 9111 and the first end face of the first side wall 9112 are parallel to each other.

[0170] The first end face of the first side wall 9112 and the second end face of the second side wall 9111 are parallel to each other, ensuring that the second end face of the second side wall 9111 is well horizontal in the second placement direction, so that the optical fiber adapter 700 is arranged perpendicular to the second end face of the second side wall 9111, that is, the vertical distance between the second end face of the second side wall 9111 and the optical fiber adapter 700 is equal, thereby improving the coupling efficiency of the optical signal between the tube body 911 and the optical fiber adapter 700.

[0171] Due to machining tolerances, the angular difference between the first inclination angle of the first end face and the second inclination angle of the second end face is within a first preset range. The first preset range is -0.3° to 0.3°. For example, the angular difference between the first inclination angle of the first end face and the second inclination angle of the second end face is within a range of -0.3° to 0.3.

[0172] As shown in Figures 13, 14, and 15, in some embodiments, the tube body 911 may include a third sidewall 9113 (top end). The third sidewall 9113 may be located between the second sidewall 9111 and the first sidewall 9112. One end of the third sidewall 9113 may be connected to the second sidewall 9111. The other end of the third sidewall 9113 may be connected to the first sidewall 9112. The third sidewall 9113 may have a second nozzle 902.

[0173] As shown in Figures 13, 14, and 15, in some embodiments, the tube body 911 may include a fifth sidewall 9114. The fifth sidewall 9114 may be located between the second sidewall 9111 and the first sidewall 9112. One end of the fifth sidewall 9114 may be connected to the second sidewall 9111. The other end of the fifth sidewall 9114 may be connected to the first sidewall 9112. One side of the fifth sidewall 9114 may be connected to the third sidewall 9113.

[0174] As shown in Figures 13, 14, and 15, in some embodiments, the tube body 911 may include a fourth sidewall 9115. The fourth sidewall 9115 may be located between the second sidewall 9111 and the first sidewall 9112. One end of the fourth sidewall 9115 may be connected to the second sidewall 9111. The other end of the fourth sidewall 9115 may be connected to the first sidewall 9112. One side of the fourth sidewall 9115 may be connected to the other side of the fifth sidewall 9114. The fourth sidewall 9115 may have a matte cavity.

[0175] As shown in Figures 13, 14, and 15, in some embodiments, the tube body 911 may include a sixth sidewall 9116. The sixth sidewall 9116 may be located between the second sidewall 9111 and the first sidewall 9112. One end of the sixth sidewall 9116 may be connected to the second sidewall 9111. The other end of the sixth sidewall 9116 may be connected to the first sidewall 9112. One side of the sixth sidewall 9116 may be connected to the other side of the fourth sidewall 9115. The other side of the sixth sidewall 9116 may be connected to the other side of the third sidewall 9113.

[0176] First, the third side wall 9113 , the fifth side wall 9114 , the fourth side wall 9115 and the sixth side wall 9116 are connected end to end in sequence, and then connected to the second side wall 9111 and the first side wall 9112 respectively, so that the tube body 911 is an oblique hexahedron.

[0177] Figure 16 is a cross-sectional view of a tube body and a fiber optic adapter according to some embodiments of the present disclosure. As shown in Figure 16, in some embodiments, the first end surface of the first side wall 9112 is tilted downward and rightward, the central axis of the second adjustment sleeve 710 is tilted upward and rightward, the central axis of the fiber ferrule 704 is tilted upward and rightward, and the tilt angle of the fiber end surface of the fiber ferrule 704 is increased from the first angle to the second angle, so that the direction of the first reflected light entering the tube body 910 through the fiber end surface changes from an upward tilt to a horizontal direction.

[0178] FIG17 is a cross-sectional view of an optical assembly and a light blocking member according to some embodiments of the present disclosure. As shown in FIG17 , in some embodiments, the optical assembly 920 may be a light processing member. The light processing member may be configured to process crosstalk light.

[0179] In some examples, the optical processing component may include a filter 921. The filter 921 may be located in the inner cavity of the tube 910. The filter 921 may be located in the optical path to transmit and / or reflect the optical signal passing through the filter 921.

[0180] For example, the optical filter 921 can be located on the transmission optical path of the optical transmitting component 400 to transmit the transmission light emitted by the optical transmitting component 400. The optical filter 921 can also be located on the receiving optical path of the optical receiving component 500 to allow the optical signal reflected by the optical filter 921 to be received by the optical receiving component 500. The optical filter 921 can also be located at the intersection of the transmission optical path of the optical transmitting component 400 and the receiving optical path of the optical receiving component 500 to allow the optical signal emitted by the optical transmitting component 400 to pass through the optical filter 921 and enter the optical fiber adapter 700, while the optical signal reflected by the optical filter 921 is received by the optical receiving component 500.

[0181] In some embodiments, the filter 921 is tilted so that the optical signal transmitted by the optical fiber adapter 700 is reflected by the filter 921 and then received by the light receiving component 500. For example, the tilt angle of the filter 921 is 45 degrees.

[0182] The emission light emitted by the optical emitting component 400 passes through the optical filter 921 and enters the optical fiber adapter 700. Most of the emission light is incident on the optical fiber adapter 700 and is transmitted to the optical fiber 101 through the optical fiber adapter 700. A small part of the emission light is reflected at the optical fiber end face of the optical fiber ferrule 704 of the optical fiber adapter 700 to form a second reflected light. The second reflected light may return to the optical emitting component 400 along the original path, thereby affecting the luminous performance of the optical emitting component 400.

[0183] To ensure the luminous performance of the light emitting component 400, as shown in FIG17 , in some embodiments, the optical assembly 920 may include a first isolator 922. The first isolator 922 may be located within the inner cavity of the tube 910. The first isolator 922 may be located between the light emitting component 400 and the optical filter 921. Light emitted by the light emitting component 400 directly passes through the first isolator 922 and the optical filter 921 and enters the fiber optic adapter 700. Light signals transmitted through the optical filter 921 cannot pass through the first isolator 922, thereby ensuring the luminous performance of the light emitting component 400.

[0184] The first reflected light returns to the tube body 910 through the optical fiber adapter 700. Part of the first reflected light passes through the optical filter 921 and enters the light emitting component 400. Part of the first reflected light is reflected again at the optical filter 921. The first reflected light after re-reflection is input into the light receiving component 500. The light receiving component 500 converts the received first reflected light into a first electrical signal. The device on the circuit board 300 obtains the abnormal condition of the optical fiber 101 based on the first electrical signal.

[0185] In some embodiments, the optical filter 921 is a semi-transparent, semi-reflective film. The optical signal from the tube 910 is partially transmitted through the optical filter 921 and partially reflected. For example, the light emitted by the light emitting component 400 is partially transmitted through the optical filter 921 to the fiber optic adapter 700 and partially reflected. The first reflected light transmitted from the fiber optic adapter 700 to the tube 910 is partially transmitted through the optical filter 921 and partially reflected to the light receiving component 500.

[0186] The outer cover of the first lens 501 of the light receiving component 500 is provided with a light blocking member 950, and the first light hole 951 of the light blocking member 950 can allow the first reflected light to be incident on the light receiving component 500. In order to allow the first reflected light to be incident on the light receiving component 500 after being reflected by the optical filter 921, as shown in FIG17 , in some embodiments, the first light hole 951 of the light blocking member 950 can be located on the reflected light path of the first reflected light reflected by the optical filter 921. The first light hole 951 of the light blocking member 950 is located on the reflected light path of the first reflected light reflected by the optical filter 921, so that the first reflected light can be incident on the light receiving component 500 through the first light hole 951 of the light blocking member 950 after being reflected by the optical filter 921. For example, the first light hole 951 of the light blocking member 950 can be located directly above the optical filter 921.

[0187] The light emitted by the optical emitting component 400 reflects off the optical filter 921, generating third reflected light. This third reflected light is diffusely reflected within the tube body 911, generating first crosstalk light. This first crosstalk light may pass through the optical filter 921 and enter the optical receiving component 500, causing crosstalk with the first reflected light and thus affecting the OTDR function of the optical module.

[0188] In order to reduce the first crosstalk light generated by the emitted light from entering the light receiving component 500, in some embodiments, the optical assembly 920 may include a light extinction element. The light extinction element may be located in a light extinction cavity. The light extinction element may be located below the filter 921 to reduce the first crosstalk light.

[0189] In some embodiments, the light extinction element may include a first light extinction element 925. The first light extinction element 925 may be located on the reflection light path of the emitted light reflected by the filter 921 to reduce the first crosstalk light. For example, the first light extinction element 925 may be located below the filter 921.

[0190] In some embodiments, the first light-absorbing element 925 may be a light-absorbing element. Since the first light-absorbing element was mentioned above, for the sake of distinction, the light-absorbing element here is referred to as a second light-absorbing element. The second light-absorbing element may be located directly below the optical filter 921 to absorb the first crosstalk light.

[0191] In some embodiments, a light absorbing layer may be deposited on the glass sheet to form a light absorbing element.

[0192] The light-absorbing layer may be a matte paint layer that can absorb data light of all wavelengths hitting the inner wall of the matte cavity (which may include the fourth nozzle 904 ).

[0193] The light absorbing layer may be a structural layer obtained by treating the inner wall of the extinction cavity (which may include the fourth nozzle 904) with a blackening process. The structural layer obtained by the blackening process absorbs data light of all wavelengths hitting the inner wall of the extinction cavity (which may include the fourth nozzle 904).

[0194] As shown in FIG17 , in some embodiments, the first light-extinguishing element 925 may be a light-transmitting element, which may be located directly below the filter 921 so that the first crosstalk light can pass through the light-transmitting element and exit the tube 910 .

[0195] In some embodiments, an anti-reflection film may be coated on the glass sheet to form a light-transmitting member.

[0196] In some embodiments, the first crosstalk light may include third reflected light.

[0197] The first reflected light may pass through the optical filter 921 and enter between the optical filter 921 and the first isolator 922. Therefore, in some embodiments, the first crosstalk light may include the first reflected light passing through the optical filter 921.

[0198] The second reflected light may pass through the optical filter 921 and enter between the optical filter 921 and the first isolator 922, that is, the second reflected light is on the left side of the optical filter 921. Therefore, in some embodiments, the first crosstalk light may include the second reflected light passing through the optical filter 921.

[0199] 17 , in some embodiments, the matte piece may include a second matte piece 926 . The second matte piece 926 may be located above the first matte piece 925 .

[0200] In some embodiments, the second light-absorbing element 926 may be a light-absorbing element. Since the first and second light-absorbing elements were mentioned above, for the sake of distinction, the light-absorbing element here is referred to as a third light-absorbing element. The third light-absorbing element can absorb the first crosstalk light reflected by the first light-absorbing element 925.

[0201] In some implementations, the second light-eliminating element 926 may be a reflective sheet located above the first light-eliminating element 925 to receive the first crosstalk light reflected by the first light-eliminating element 925 and reflect the received first crosstalk light back to the first light-eliminating element 925 .

[0202] For example, the first matte element 925 is a translucent sheet, and the second matte element 926 is a reflective sheet. Most of the first crosstalk light is transmitted out of the tube body 910 through the translucent element, and a small part of the first crosstalk light is reflected to the reflective sheet, then reflected to the translucent element by the reflective sheet, and finally transmitted out of the tube body 910 through the translucent element.

[0203] To reduce the return of the first crosstalk light along the original path, as shown in FIG17 , in some embodiments, the optical assembly 920 may include an isolator 924. The isolator 924 may be located on the reflected light path of the emitted light from the optical filter 921 to reduce the first crosstalk light. For example, the isolator 924 may be located below the optical filter 921.

[0204] In some embodiments, the isolator 924 may be located at the connection between the inner cavity of the tube 910 and the extinction cavity. The isolator 924 may be located between the filter 921 and the extinction element to reduce the return of the first crosstalk light incident on the extinction element.

[0205] The second reflected light is reflected in the tube body on the right side of the filter 921, forming second crosstalk light. The second crosstalk light may enter the light receiving component 500, causing crosstalk to the first reflected light, thereby affecting the OTDR function of the optical module.

[0206] In order to reduce the second crosstalk light generated by the emission light from entering the light receiving component 500 , as shown in FIG. 17 , in some embodiments, the optical assembly 920 may include a light processing element.

[0207] In some examples, the optical processing component may include a first light absorbing element 923. The first light absorbing element 923 may be located within the inner cavity of the tube 910. The first light absorbing element 923 may be located between the optical filter 921 and the fiber adapter 700. The first light absorbing element 923 may be located in the reflected light path of the emitted light from the optical fiber end face to absorb the second reflected light, thereby reducing the second crosstalk light generated by the second reflected light reflecting within the tube to the right of the optical filter 921, thereby reducing the crosstalk between the second crosstalk light and the first reflected light.

[0208] FIG18 is a structural diagram of an isolation member according to some embodiments of the present disclosure. As shown in FIG17 and FIG18 , in some embodiments, the isolation member 924 may include a first isolation portion 9241 . The first isolation portion 9241 may have a fourth light-through hole 9243 .

[0209] As shown in Figures 17 and 18, in some embodiments, the isolation member 924 may include a second isolation portion 9242. The second isolation portion 9242 may have a fifth light-through hole 9244. One end of the second isolation portion 9242 may be connected to the first isolation portion 9241 to connect the fourth light-through hole 9243 and the fifth light-through hole 9244.

[0210] In some embodiments, the fourth light hole 9243 formed by the first isolation portion 9241 is smaller than the fifth light hole 9244 formed by the second isolation portion 9242. For example, the radius of the fourth light hole 9243 is smaller than the radius of the fifth light hole 9244.

[0211] The second isolating portion 9242 is closer to the optical filter 921 than the first isolating portion 9241, and the first isolating portion 9241 is closer to the light extinction element than the second isolating portion 9242. The fifth light passage 9244 is larger than the fourth light passage 9243, allowing a greater amount of first crosstalk light to enter the light extinction element sequentially through the fifth and fourth light passages 9244 and 9243. However, because the fourth light passage 9243 is smaller than the fifth light passage 9244, the first crosstalk light entering the light extinction element, after being reflected by the light extinction element, is mostly incident on the outer wall of the isolating portion 924, while a smaller portion is returned sequentially through the fourth and fifth light passages 9243 and 9244 to the area between the optical filter 921 and the first isolator 922.

[0212] In some embodiments, the inner wall of the isolator 924 may be provided with a light-absorbing layer. The light-absorbing layer may be used to absorb the first crosstalk light that passes through the light-through hole of the isolator 924. For example, when the first crosstalk light is incident on the extinction cavity from the inner cavity of the tube body through the light-through hole of the isolator 924, the light-absorbing layer on the inner wall of the isolator 924 may absorb the first crosstalk light to reduce the first crosstalk light incident on the extinction cavity. When the first crosstalk light is incident on the inner cavity of the tube body from the extinction cavity through the light-through hole of the isolator 924, the light-absorbing layer on the inner wall of the isolator 924 may absorb the first crosstalk light to reduce the first crosstalk light incident on the inner cavity of the tube body.

[0213] In some embodiments, the isolation element 924 can be an isolator. Since the first isolator was mentioned above, for the sake of distinction, the isolator here is defined as a second isolator. The second isolator can be located between the filter 921 and the extinction element to prevent the first crosstalk light incident on the extinction element from returning along its original path.

[0214] The isolator adjusts the polarization state of the passing optical signal so that it can transmit the optical signal in the forward direction and isolate it in the reverse direction.

[0215] The isolator consists of a first polarizer, a Faraday plate, and a second polarizer, all connected in sequence. Because the Faraday plate rotates only in one direction, polarized light passing through the first polarizer cannot return to the first polarizer after being rotated by the Faraday plate. This gives the isolator the properties of forward transmission and reverse isolation.

[0216] FIG19 illustrates the structure of a first light absorbing member according to some embodiments of the present disclosure. As shown in FIG17 and FIG19 , in some embodiments, the first light absorbing member 923 may include a light absorbing surface 9231. This surface 9231 may be disposed opposite the bottom surface of the first light absorbing member 923. The light absorbing surface 9231 may face the fiber optic adapter 700 to absorb the second reflected light reflected from the fiber end face of the fiber ferrule 704.

[0217] In some embodiments, the bottom surface of the first light absorbing member 923 may serve as a horizontal surface.

[0218] In some embodiments, the light absorbing surface 9231 may be an inclined surface, i.e., the third predetermined angle between the light absorbing surface 9231 and the horizontal plane is non-0°, so as to reduce the angle of incidence of the second reflected light reflected from the optical fiber end face of the optical fiber ferrule 704. This reduces the second reflected light (i.e., the second crosstalk light) reflected by the light absorbing surface 9231 and strikes the outer wall of the light blocking member 950, thereby reducing the second crosstalk light from entering the light receiving component 500 through the first light opening 951. For example, the third predetermined angle between the light absorbing surface 9231 and the bottom surface of the first light absorbing member 923 is non-0°, so that the light absorbing surface 9231 may be an inclined surface.

[0219] In some embodiments, the vertical distance between the first end of the light-absorbing surface 9231 (the end closer to the fiber optic adapter 700) and the horizontal plane can be smaller than the vertical distance between the second end of the light-absorbing surface 9231 (the end farther from the fiber optic adapter 700) and the horizontal plane. This allows the first end of the light-absorbing surface 9231 to be tilted downward relative to the horizontal plane, thereby orienting the light-absorbing surface 9231 toward the fiber optic adapter 700, thereby facilitating absorption of the second reflected light reflected from the fiber end face of the fiber ferrule 704. For example, the vertical distance between the first end of the light-absorbing surface 9231 and the bottom surface of the first light-absorbing element 923 can be smaller than the vertical distance between the second end of the light-absorbing surface 9231 and the bottom surface of the first light-absorbing element 923.

[0220] As shown in Figure 19, a is a vertical plane, b is the normal to the light absorbing surface 9231, c is the normal to the optical fiber end face, x is the sum of the first and second preset angles, y is the third preset angle, and z is the fifth preset angle between the reflected light of the second reflected light and the vertical plane. In the extreme case, when the reflected light of the second reflected light hits the edge of the first light opening 951 of the light blocking member 950, z is 24°. Therefore, in some embodiments, z is less than 24° so that the light blocking member 950 can block the second reflected light after being reflected by the first light absorbing member 923, i.e., the second crosstalk light.

[0221] As shown in FIG18 , 2x+y+y+z=90°, z is less than 24°, and then x+y>33°, where x is α+β.

[0222] Since x is the sum of the first preset angle and the second preset angle, a first preset relationship among the first preset angle, the second preset angle, and the third preset angle is: α+β+y>33°.

[0223] As shown in FIG19 , in some embodiments, the first light absorbing member 923 may include a stop surface 9232. The stop surface 9232 is further away from the fiber optic adapter 700 than other surfaces of the first light absorbing member 923. One end of the stop surface 9232 may be connected to the light absorbing surface 9231. The other end of the stop surface 9232 may be connected to the bottom surface of the first light absorbing member 923.

[0224] Figure 20 is a cross-sectional view of a tube body provided according to some embodiments of the present disclosure. Figure 21 is a cross-sectional view of a tube body provided according to some embodiments of the present disclosure from another perspective. Figure 22 is a cross-sectional view of a tube body and an optical component provided according to some embodiments. As shown in Figures 20, 21, and 22, in some embodiments, the tube body 910 may have a first placement hole 901. The first placement hole 901 may be connected to the first pipe opening of the tube body 911 so that the emission light emitted by the light emitting component 400 is incident into the tube body 911 through the first pipe opening. For example, the first adjustment sleeve 912 of the tube body 910 has a first placement hole 901.

[0225] As shown in Figures 20, 21, and 22, in some embodiments, the tube body 910 may have a second storage hole 907. One end of the second storage hole 907 may be connected to the first storage hole 901, so that the second storage hole 907 and the first storage hole 901 are connected, thereby allowing the light emitted by the light emitting component 400 to enter the tube body 911 through the second storage hole 907. For example, the second storage hole 907 is a first opening of the tube body 911, and the first opening is connected to the second storage hole 907.

[0226] In some embodiments, the size of the second storage through hole 907 is smaller than the size of the first storage through hole 901 , so that the light emitting component 400 is positioned before the second storage through hole 907 .

[0227] As shown in Figures 20, 21, and 22, in some embodiments, the second storage hole 907 may be provided with a first isolator 922. The first isolator 922 may be fixed to the second storage hole 907 by glue, so that the first isolator 922 and the second storage hole 907 are fixedly connected.

[0228] As shown in Figures 20, 21, and 22, in some embodiments, the tube body 910 may have a second light-through hole 906. One end of the second light-through hole 906 may be connected to the other end of the second storage hole 907, thereby connecting the second light-through hole 906 and the second storage hole 907. This in turn connects the first storage hole 901, the second storage hole 907, and the second light-through hole 906. Light emitted by the light-emitting component 400 enters the second light-through hole 906 through the first isolator 922.

[0229] In some embodiments, the size of the second light hole 906 is smaller than the size of the second object placement hole 907 , so that the first isolator 922 is located before the second light hole 906 .

[0230] As shown in Figures 20, 21, and 22, in some embodiments, the other end of the second light-through hole 906 can be a first support surface 905. The first support surface 905 is arranged toward the second pipe opening 902 and the third pipe opening 903, so that the second light-through hole 906 is connected to the second pipe opening 902 or the third pipe opening 903.

[0231] As shown in Figures 20, 21 and 22, in some embodiments, a filter 921 can be provided on the first supporting surface 905, that is, the bottom surface of the filter 921 is in contact with the first supporting surface 905 to allow the optical signal in the second light hole 906 to pass through the filter 921.

[0232] In some embodiments, the fifth preset angle between the first support surface 905 and the horizontal plane is non-0°, so that the first support surface 905 is tilted. For example, the fifth preset angle is 45°, and the first support surface 905 is tilted 45° along the horizontal plane.

[0233] As shown in Figures 20, 21, and 22, in some embodiments, the tube body 910 may have a second support surface 909. The second support surface 909 may be arranged horizontally. The second support surface 909 may be located between the first support surface 905 and the fiber optic adapter 700. The first light absorbing member 923 may be placed on the second support surface 909.

[0234] As shown in FIG. 20 , FIG. 21 and FIG. 22 , the bottom surface of the first light absorbing member 923 may be in contact with and connected to the second supporting surface 909 , so that the second supporting surface 909 supports the first light absorbing member 923 .

[0235] 20 , 21 , and 22 , in some embodiments, the tube body 910 may have a connecting plate 991. The connecting plate 991 may be located between the first support surface 905 and the second support surface 909 to separate the first support surface 905 from the second support surface 909.

[0236] In some embodiments, the connecting plate 991 may include a first connecting surface 9911. One end of the first connecting surface 9911 may be connected to the first supporting surface 905. The first connecting surface 9911 may be in contact with one end surface of the optical filter 921 to support the optical filter 921 and thereby define the position of the optical filter 921 in the tube body 910.

[0237] In some embodiments, the angle between the bottom surface of the filter 921 and the end surface of the filter 921 can be equal to the angle between the first supporting surface 905 and the first connecting surface 9911, so as to increase the contact area between the filter 921 and the tube body 910, thereby improving the connection stability between the filter 921 and the tube body 910. For example, the bottom surface of the filter 921 and the end surface of the filter 921 are perpendicular to each other, and the first supporting surface 905 and the first connecting surface 9911 can be perpendicular to each other.

[0238] In some embodiments, the connecting plate 991 may include a second connecting surface 9912. One end of the second connecting surface 9912 may be connected to the other end of the first connecting surface 9911. The other end of the second connecting surface 9912 may be connected to the second support surface 909. The second connecting surface 9912 may be in contact with one end surface of the first light absorbing member 923 to stop the first light absorbing member 923 in front of the connecting plate 991, thereby defining the position of the first light absorbing member 923 in the tube body 910. For example, the stop surface 9232 of the first light absorbing member 923 may be connected to the second connecting surface 9912 of the connecting plate 991 to stop the first light absorbing member 923 in front of the connecting plate 991.

[0239] In some embodiments, the angle between the bottom surface of the first light absorbing member 923 and the stop surface 9232 of the first light absorbing member 923 and the angle between the second connecting surface 9912 and the second supporting surface 909 can be equal to increase the contact area between the first light absorbing member 923 and the tube body 910, thereby improving the connection stability between the first light absorbing member 923 and the tube body 910. For example, the bottom surface of the first light absorbing member 923 and the stop surface 9232 of the first light absorbing member 923 are perpendicular to each other, and the second connecting surface 9912 and the second supporting surface 909 can be perpendicular to each other.

[0240] In some embodiments, the angle between the first connecting surface 9911 and the second connecting surface 9912 can be equal to the angle between the first supporting surface 905 and the horizontal plane. For example, if the angle between the first supporting surface 905 and the horizontal plane is 45°, the angle between the first connecting surface 9911 and the second connecting surface 9912 can also be 45°.

[0241] As shown in Figures 20, 21, and 22, in some embodiments, the tube body 910 may have a third light-through hole 908. The third light-through hole 908 may be located below the second light-through hole 906. The third light-through hole 908 may be disposed opposite the first support surface 905. The third light-through hole 908 may communicate with the second light-through hole 906. The third light-through hole 908 may communicate with the extinction cavity (which may include the fourth tube opening 904).

[0242] The third light hole 908 can be connected to the second light hole 906 and the extinction cavity (which may include the fourth pipe opening 904), so that the first crosstalk light in the second light hole 906 can be transmitted to the extinction cavity (which may include the fourth pipe opening 904) through the third light hole 908.

[0243] In some embodiments, the inner wall of the extinction cavity (which may include the fourth nozzle 904) may be provided with a light shield. The light shield may include a light-blocking ring. The light-blocking ring can be used to reduce the first crosstalk light. The presence of the light-blocking ring reduces the distance that the first crosstalk light needs to reflect back and forth from the inner wall of the light-blocking ring, increasing the number of reflections and increasing light loss, thereby reducing the first crosstalk light.

[0244] In some embodiments, the inner wall of the extinction cavity (which may include the fourth nozzle 904 ) may be provided with a light absorbing layer, which may be used to absorb the first crosstalk light.

[0245] In some embodiments, the inner wall of the extinction cavity (which may include the fourth nozzle 904) may be recessed inward to form a groove. The groove may increase the roughness of the inner wall of the extinction cavity (which may include the fourth nozzle 904), reduce the reflectivity of the inner wall of the extinction cavity (which may include the fourth nozzle 904), and thereby reduce the first crosstalk light reflection.

[0246] In some embodiments, a light-extinguishing element is mounted on the inner wall of the light-extinguishing cavity, which can reduce the first crosstalk light incident into the light-extinguishing cavity.

[0247] In order to reduce the first crosstalk light transmitted to the extinction cavity (which may include the fourth nozzle 904 ) and then returned to the second light hole 906 through the third light hole 908 , in some embodiments, an isolation member 924 may be provided in the third light hole 908 .

[0248] When the spacer 924 is placed in the third light through hole 908 as shown in FIG. 17 , the size of the third light through hole 908 decreases from the second light through hole 906 to the extinction cavity (which may include the fourth nozzle 904 ).

[0249] When the isolation member 924 placed in the third light through hole 908 is an isolator, the size of the third light through hole 908 remains unchanged from the second light through hole 906 to the extinction cavity (which may include the fourth nozzle 904).

[0250] Because the matte cavity is open to the outside to form the fourth nozzle 904, in some embodiments, a support plate may be placed within the fourth nozzle 904 to ensure the sealing of the optical transceiver 900. The outer wall of the support plate contacts and connects with the inner wall of the fourth nozzle 904, so that the support plate blocks the fourth nozzle 904, thereby ensuring the sealing of the optical transceiver 900. The support plate may be provided with a third support surface. The third support surface may be provided with a matte element. For example, the third support surface may be provided with a first matte element 925.

[0251] In some embodiments, the support plate may be made of metal. For example, when the support plate is made of metal, the first matting element 925 on the support plate may be a light absorbing element.

[0252] In some embodiments, the support plate may be made of transparent glass. For example, when the support plate is made of transparent glass, the first matte piece 925 on the support plate may be a light-transmitting piece.

[0253] In some embodiments, the third supporting surface of the supporting plate may be an inclined surface to reduce the first crosstalk light incident on the first light extinction element 925 from returning along the original path.

[0254] To ensure the sealing of the optical transceiver component 900, as shown in Figures 20, 21, and 22, in some embodiments, the inner wall of the fourth nozzle 904 may include a sixth light-transmitting hole 942. The first light-removing member 925 may be larger than the sixth light-transmitting hole 942. The first light-removing member 925 may be attached to one end surface of the sixth light-transmitting hole 942 so that the first light-removing member 925 blocks the sixth light-transmitting hole 942, thereby ensuring the sealing of the optical transceiver component 900.

[0255] One end surface of the sixth light-through hole 942 may be the first mounting surface 941 of the inner wall of the fourth nozzle 904 , that is, the first matting member 925 may be mounted on the first mounting surface 941 .

[0256] The inner wall of the fourth nozzle 904 may further include other mounting surfaces. In some embodiments, the other mounting surfaces may include a second mounting surface 9421. The second mounting surface 9421 may serve as the other end surface of the sixth light passage 942. The second mounting surface 9421 may serve as one end surface of the third light passage 908. The other end surface of the sixth light passage 942 may serve as the second mounting surface 9421, and the second mounting surface 9421 may also serve as one end surface of the third light passage 908, thereby connecting the third light passage 908 and the sixth light passage 942.

[0257] In some embodiments, the size of the sixth light hole 942 is larger than that of the third light hole 908, which facilitates the first crosstalk light from the third light hole 908 to enter the sixth light hole 942 and reduces the first crosstalk light from the sixth light hole 942 returning to the third light hole 908.

[0258] In some embodiments, the first mounting surface 941 may be an inclined surface to reduce the first crosstalk light incident on the first light extinction element 925 from returning along the original path.

[0259] In some embodiments, the other mounting surfaces may include a third mounting surface 9422. One end of the third mounting surface 9422 may be connected to the second mounting surface 9421. The other end of the second mounting surface 9421 may be connected to the first mounting surface 941.

[0260] As shown in Figures 20, 21, and 22, one surface of the second matting element 926 can be in contact with and connected to the second mounting surface 9421. Another surface of the second matting element 926 can be in contact with and connected to the third mounting surface 9422. The matting surface of the second matting element 926 is disposed opposite the first matting element 925 to receive the first crosstalk light reflected by the first matting element 925. For example, the reflective surface of the reflective sheet is disposed opposite the first matting element 925 so that the reflective surface receives the first crosstalk light reflected by the first matting element 925 and also reflects the first crosstalk light incident on the reflective surface back to the first matting element 925.

[0261] Figure 23 is a cross-sectional view of an optical transceiver assembly and a fiber optic adapter according to some embodiments of the present disclosure. Figure 24 is a light path diagram of an optical transceiver assembly according to some embodiments of the present disclosure. As shown in Figures 23 and 24, in some embodiments, after the light emitted by the optical emitting assembly 400 passes through the first isolator 922, a portion of the light passes through the optical filter 921 before entering the optical fiber ferrule 704. The majority of the light then passes through the optical fiber end face of the optical fiber ferrule 704 and enters the interior of the optical fiber ferrule 704, where it is then transmitted along the optical fiber 101 connected to the optical fiber ferrule 704. When an abnormality occurs in the optical fiber 101, the emitted light transmitted in the optical fiber 101 is reflected in the optical fiber 101 to form a first reflected light. The first reflected light returns to the optical fiber end face of the optical fiber ferrule 704. The first reflected light is horizontally incident on the filter 921 in the tube body 910 through the optical fiber end face. Part of the first reflected light is transmitted through the filter 921, and part of the first reflected light is reflected through the filter 921 to the first light hole 951 of the light blocking component 950 to be received by the light receiving component 500.

[0262] After the emission light emitted by the light emitting component 400 passes through the first isolator 922, part of the emission light passes through the filter 921 before being incident on the optical fiber ferrule 704, and a small part of the emission light is reflected by the optical fiber end face of the optical fiber ferrule 704 to form a second reflected light. The second reflected light is incident on the first light absorbing element 923, part of the second reflected light is absorbed by the first light absorbing element 923, and part of the second reflected light is reflected by the first light absorbing element 923 and is incident on the area of ​​the light blocking element 950 other than the first light hole 951.

[0263] After the light emitted by the light emitting component 400 passes through the first isolator 922 , part of the light is reflected by the filter 921 and then passes through the isolator 924 into the fourth nozzle 904 , and is absorbed by the extinction element in the fourth nozzle 904 or transmitted out of the tube body 910 .

[0264] In some embodiments, the tube body has an extinction cavity, and a light-through hole is provided at the connection point between the extinction cavity and the inner cavity of the tube body, so that the extinction cavity is connected to the inner cavity of the tube body, thereby transmitting the first crosstalk light in the inner cavity of the tube body to the extinction cavity. The extinction cavity is arranged relative to the light receiving component so that the first crosstalk light is transmitted in the opposite direction of the light receiving component, further reducing the first crosstalk light incident on the light receiving component. In order to further reduce the first crosstalk light returning from the extinction cavity to the inner cavity of the tube body, an extinction member is mounted on the inner wall of the extinction cavity. The extinction member is used to reduce the crosstalk light incident on. In order to further reduce the first crosstalk light returning from the extinction cavity to the inner cavity of the tube body, an isolation member is provided at the light-through hole, and the isolation member is used to reduce the first crosstalk light returning from the extinction cavity to the inner cavity of the tube body. The isolation member and the extinction member cooperate with each other to reduce the influence of the first crosstalk light on the first reflected light, thereby improving the accuracy of the detection results, thereby improving the OTDR function of the optical module.

[0265] In some embodiments, a first light absorbing element is disposed within the tube body and is located in the optical path of the second reflected light to absorb the second reflected light. However, some of the second reflected light may be reflected by the first light absorbing element. Therefore, a light blocking element is provided on the outer cover of the first lens of the light receiving component to prevent the second crosstalk light from entering the light receiving component. However, to enable the light receiving component to receive the first reflected light, the light blocking element has a first light passage. The first light passage is located in the optical path of the first reflected light after being reflected by the filter, allowing the first reflected light to enter the light receiving component. To reduce the second crosstalk light from entering the light receiving component through the first light passage, the first light absorbing element is tilted. The tilted arrangement of the first light absorbing element allows the second crosstalk light, generated by the second reflected light reflecting off the first light absorbing element, to enter an area of ​​the light blocking element other than the first light passage, further reducing the second crosstalk light from entering the light receiving component. The light blocking element and the first light absorbing element cooperate to reduce the impact of the second crosstalk light on the first reflected light, thereby improving the accuracy of the detection results and thus enhancing the OTDR function of the optical module.

[0266] Figure 25 is a partial structural diagram of the optical transceiver component in the optical module provided according to some embodiments of the present disclosure. As shown in Figure 25, in some embodiments, because the filter 930 is a semi-transparent and semi-reflective membrane, when the OTDR transmitted light passes through the filter 930, part of the OTDR transmitted light is reflected at the filter 930. The reflected OTDR transmitted light is diffusely reflected within the square tube 910, thus forming crosstalk light. The crosstalk light may enter the optical receiving component 500. In this way, the crosstalk light formed by the filter 930 will cause signal crosstalk to the first OTDR reflected light. This crosstalk will affect the attenuation blind zone of the OTDR, resulting in a larger attenuation blind zone of the OTDR, thereby affecting the OTDR monitoring performance.

[0267] In order to prevent the crosstalk light generated by the OTDR emission light at the filter 930 from causing signal crosstalk to the OTDR reflected light, the optical component in the square tube body 910 also includes a first light absorber 940. The first light absorber 940 is arranged on the reflected light path of the OTDR emission light reflected by the filter 930. The first light absorber 940 can absorb the OTDR emission light reflected at the filter 930, thereby preventing the OTDR emission light from entering the light receiving component 500, thereby ensuring the OTDR performance of the optical module.

[0268] In some examples, the light absorbing plate holder 9020 can be embedded in the fourth tube opening 904, and the first light absorbing plate 940 is installed in the light absorbing plate holder 9020, so that the first light absorbing plate 940 can be installed in the square tube body 910 through the light absorbing plate holder 9020, so as to facilitate the first light absorbing plate 940 to absorb the OTDR emission light reflected at the filter 930.

[0269] Figure 26 is a first cross-sectional view of a tube body in an optical module according to some embodiments of the present disclosure, and Figure 27 is a second cross-sectional view of a tube body in an optical module according to some embodiments of the present disclosure. As shown in Figures 26 and 27, in order to arrange an optical component in a round square tube body (in some examples, it can also be referred to as a tube body) 910, a first support surface 905 is formed in the round square tube body 910. The first support surface 905 is arranged at an angle, and a filter 930 is mounted on the first support surface 905, with the transmissive surface of the filter 930 facing the through hole 901 and the reflective surface of the filter 930 facing the second tube opening 902, so that the filter 930 is installed in the round square tube body 910.

[0270] A second light-through hole 906 and a second storage hole 907 are also formed in the square tube body 910. The second light-through hole 906 passes through the first supporting surface 905. The second storage hole 907 is located between the through hole 901 and the second light-through hole 906. The through hole 901 and the second storage hole 907 are connected to the second light-through hole 906. The optical isolator is installed in the second storage hole 907.

[0271] In this way, after the optical emitting component 400 is inserted into the through hole 901, the OTDR emission (in some examples, it can be called emission light) light generated by the optical emitting component 400 passes through the optical isolator, and the OTDR emission light passing through the optical isolator passes through the second light through hole 906 and is transmitted to the filter 930. The OTDR emission light passes through the optical filter 930 and is coupled to the optical fiber adapter 700 inserted into the third tube port 903 to realize the emission of the OTDR emission light.

[0272] In some embodiments, since the filter 930 is a semi-transparent and semi-reflective film, the OTDR emission light is divided into the first OTDR light and the second OTDR light by the filter 930. The first OTDR light directly passes through the filter 930 and enters the fiber optic adapter 700, and the second OTDR light is reflected downward.

[0273] The second OTDR light is called crosstalk light. Since the crosstalk light is diffusely reflected in the square tube body 910, when the crosstalk light enters the light receiving component 500, the crosstalk light will cause crosstalk to the OTDR. Therefore, a third light hole 908 is formed in the square tube body 910. The third light hole 908 connects the inner cavity of the square tube body 910 and the fourth tube mouth 904, so that the second OTDR light passes through the third light hole 908 and enters the fourth tube mouth 904, so that the second OTDR light is diffusely reflected in the fourth tube mouth 904. The diffusely reflected light will not pass through the third light hole 908 and enter the square tube body 910, and the second OTDR light will not enter the light receiving component 500 to cause signal crosstalk.

[0274] In some embodiments, since the fourth pipe mouth 904 is embedded with a light absorbing plate bracket 9020, and the light absorbing plate bracket 9020 is installed with a first light absorbing plate 940, after the second OTDR light is incident on the fourth pipe mouth 904 through the third light hole 908, the first light absorbing plate 940 absorbs the second OTDR light to eliminate the second OTDR light, thereby avoiding the second OTDR light causing signal crosstalk to the OTDR reflected light.

[0275] Figure 28 is a structural diagram of a light-absorbing sheet support in an optical module according to some embodiments of the present disclosure. As shown in Figure 28, the light-absorbing sheet support 9020 includes a support platform 9201 and a support column 9202. The support column 9202 is mounted on the support platform 9201. The diameter of the support platform 9201 is larger than the diameter of the support column 9202. The support platform 9201 is embedded in the fourth nozzle 904. The outer surface of the support platform 9201 is bonded and fixed to the inner wall of the fourth nozzle 904. The bottom surface of the support platform 9201 is flush with the bottom surface of the square tube body 910, thereby achieving a fixed connection between the light-absorbing sheet support 9020 and the square tube body 910.

[0276] The support column 9202 is asymmetrical at both ends, with one end being shorter than the other. For example, the height of the support column 9202 near the optical emitting component 400 (the left end) is shorter than the height of the support column 9202 near the optical fiber adapter 700 (the right end). A mounting surface 9203 is formed on the support column 9202. The mounting surface 9203 is inclined from the longer end of the support column 9202 toward the shorter end. That is, the distance between the mounting surface 9203 and the support platform 9201 gradually increases along the light emission direction (left-right direction) of the optical emitting component 400. The first light absorbing sheet 940 is affixed to the mounting surface 9203.

[0277] In some embodiments, the first light absorber 940 is used to absorb crosstalk light. However, the first light absorber 940 has a certain degree of specular reflection, which will reflect some of the unabsorbed crosstalk light, resulting in the first light absorber 940 being unable to absorb all of the crosstalk light. To this end, the mounting surface 9203 is tilted, so that the first light absorber 940 is tilted. When the first light absorber 940 is tilted, the unabsorbed crosstalk light is dispersed along other transmission directions, preventing the unabsorbed crosstalk light from being reflected along its original path to the optical filter 930. This further prevents the crosstalk light from being reflected by the filter and returning to the light emitting component 400, thereby ensuring the luminous performance of the light emitting component 400.

[0278] In some embodiments, when the first light absorbing plate 940 absorbs the second OTDR light, a small portion of the second OTDR light is diffusely reflected at the first light absorbing plate 940. In order to prevent the second OTDR light from being diffusely reflected in the fourth pipe mouth 904 and entering the square tube body 910 through the third light hole 908, the diameter of the third light hole 908 is smaller than the diameter of the fourth pipe mouth 904, so as to reduce the diffusely reflected light from entering the square tube body 910 through the third light hole 908, so that the second OTDR light will not enter the optical receiving component 500 and cause signal crosstalk.

[0279] In some embodiments, to weaken the energy of the second OTDR's light splitting within the fourth nozzle 904, the mounting surface 9203 may have a hollow structure at its center and solid surfaces at its ends. The first light absorbing sheet 940 is affixed to the solid surfaces at both ends of the mounting surface 9203. Due to the hollow structure at the center of the mounting surface 9203, the entire surface of the first light absorbing sheet 940 does not come into contact with the mounting surface 9203 when the first light absorbing sheet 940 is affixed to the mounting surface 9203. If the entire surface of the first light absorbing sheet 940 were in contact with the mounting surface 9203, crosstalk light not absorbed by the first light absorbing sheet 940 would be reflected along the mounting surface 9203. Therefore, the hollow design of the mounting surface 9203 can reduce the amount of crosstalk light reflected.

[0280] In some embodiments, the hollow structure of the assembly surface 9203 may be a cavity, and a hole 9205 is formed on the assembly surface 9203, which is connected to the inner cavity of the support column 9202. Since the light absorbing sheet 940 has a certain transmittance, the crosstalk light that is not absorbed by the first light absorbing sheet 940 is transmitted to the inner cavity of the support column 9202 through the hole 9205 of the assembly surface 9203. The inner cavity of the support column 9202 provides a diffuse reflection space for the transmitted crosstalk light, so that the transmitted crosstalk light is diffusely reflected in the inner cavity of the support column 9202, so as to weaken the energy of the crosstalk light and prevent the crosstalk light from being reflected again through the first light absorbing sheet 940.

[0281] In some embodiments, a limiting surface 9204 may be formed on the support column 9202. The limiting surface 9204 is tilted, i.e., the distance between the limiting surface 9204 and the support platform 9201 gradually decreases along the left-right direction. The right end of the limiting surface 9204 is connected to the left end of the assembly surface 9203, forming a V-shaped structure with the assembly surface 9203. When the first light absorbing sheet 940 is mounted on the assembly surface 9203, the left end surface of the first light absorbing sheet 940 is affixed to the limiting surface 9204, and the bottom surface of the first light absorbing sheet 940 is affixed to the assembly surface 9203. The V-shaped structure ensures the tilt angle of the first light absorbing sheet 940, so that when the second OTDR light is diffusely reflected by the first light absorbing sheet 940, the diffusely reflected light cannot pass through the third light hole 908.

[0282] In some embodiments, a groove 9206 is formed at the connection between the limiting surface 9204 and the assembly surface 9203. When the first light absorbing sheet 940 is adhered to the assembly surface 9203 and the limiting surface 9204 with glue, the glue will overflow under the action of gravity. The overflowed glue will cause the first light absorbing sheet to warp or not be firmly adhered. Therefore, a groove 9206 is formed on the support column 9202 to collect the overflowed glue to avoid the overflowed glue from adversely affecting the first light absorbing sheet 940.

[0283] In some embodiments, the groove 9206 can not only collect overflowed glue, but the setting of the groove 9206 can also avoid structural residues from the processing of the support column 9202, allowing the first light absorbing sheet 940 and the light absorbing sheet bracket 9020 to avoid each other to ensure the mounting accuracy of the first light absorbing sheet 940.

[0284] A first light absorbing plate 940 is provided on the reflected light path of the OTDR emission light on the optical filter 930. The first light absorbing plate 940 can absorb most of the second OTDR light. The first light absorbing plate 940 can also reflect and transmit a small part of the second OTDR light (referred to as reflected light and transmitted light, respectively). By tilting the first light absorbing plate 940, the reflected light is diverged along other transmission directions to prevent the reflected light from returning to the optical filter 930. The cavity in the support column 9202 provides a diffuse reflection space for the transmitted light, so that the transmitted light is diffusely reflected in the cavity, thereby weakening the energy of the second OTDR light and preventing the second OTDR light from being reflected again through the first light absorbing plate 930.

[0285] The OTDR emission light emitted by the optical emitting component 400 is transmitted through the optical filter 930 to the optical fiber adapter 700. The OTDR emission light is transmitted to the external optical fiber 101 via the optical fiber ferrule in the optical fiber adapter 700. Due to the difference in transmission media, the OTDR emission light is easily reflected at the optical fiber end face of the optical fiber ferrule to form a second OTDR reflected light. The second OTDR reflected light may return to the optical emitting component 400 along the original route, affecting the luminescence performance of the optical emitting component 400.

[0286] Figure 29 is a first cross-sectional view of an optical transceiver component in an optical module according to some embodiments of the present disclosure. As shown in Figure 29, the OTDR transmission light emitted by the optical transmitting component 400 passes through the optical filter 930 and is emitted into the optical fiber of the optical fiber ferrule 704 for transmission. The first OTDR reflected light of the optical fiber link, which is reflected from each node of the external optical fiber 101, is transmitted from the optical fiber to the air. Due to the tilted end face of the optical fiber ferrule 704, the first OTDR reflected light is refracted when transmitted from the optical fiber of the optical fiber ferrule 704 to the air. Therefore, the first OTDR reflected light forms a 3.7° angle with the OTDR transmission light.

[0287] Because filter 930 selects the wavelength of light it transmits and reflects based on the thickness of its surface coating, the transmission and reflection bands of the coating shift by 7nm for every 1° change in the angle between the emitted light and filter 930. When the OTDR emitted light forms a 45° angle with filter 930, and the OTDR emitted light forms a 3.7° angle with the first OTDR reflected light, the first OTDR reflected light forms a 41.3° relative angle with filter 930. Given that the transmission and reflection bands shift by approximately 7nm for every 1° change in the angle between the optical path and the coating, a 3.7° angle results in a coating shift of approximately 26nm, just exceeding the 20nm transmission band and reaching the reflection band. As a result, the first OTDR reflected light is reflected through filter 930 to the light receiving component 500, rather than passing through filter 930 and entering the light emitting component 400, thus ensuring the luminous performance of the light emitting component 400.

[0288] In some embodiments, since the optical fiber ferrule 704 is tilted and the optical fiber end face of the optical fiber ferrule 704 is tilted, part of the OTDR emission light that passes through the optical filter 930 is reflected at the optical fiber end face to form a second OTDR reflected light. The second OTDR reflected light is transmitted toward the lower left direction, and part of the second OTDR reflected light may be transmitted to the optical filter 930. The second OTDR reflected light is reflected again at the filter 930. The re-reflected second OTDR reflected light is easily incident on the optical receiving component 500, causing the second OTDR reflected light to cause signal crosstalk to the first OTDR reflected light.

[0289] FIG30 is a structural diagram of a filter in an optical module according to some embodiments of the present disclosure, and FIG31 is a partial cross-sectional view of an optical transceiver component in an optical module according to some embodiments of the present disclosure. As shown in FIG30 and FIG31, in order to prevent the second OTDR reflected light reflected by the optical fiber end face from being reflected into the optical receiving component 500 via the optical filter 930, a semi-transparent semi-reflective film 9301 and a light-absorbing film 9302 are plated on the side of the optical filter 930 facing the optical fiber adapter 700. The semi-transparent semi-reflective film 9301 is located on the upper left side of the optical filter 930, and the light-absorbing film 9302 is located on the lower right side of the optical filter 930. The size of the light-absorbing film 9302 is in a preset ratio with the size of the filter 930, so that the optical emitting component 40 0. The OTDR emission light emitted by the OTDR passes through the semi-transparent and semi-reflective film 9301 on the optical filter 930 without passing through the light-absorbing film 9302. The second OTDR reflected light reflected by the OTDR emission light at the optical fiber end face of the optical fiber ferrule 704 is directed toward the light-absorbing film 9302, that is, the light-absorbing film 9302 is located on the reflection light path of the second OTDR reflected light. In this way, the light-absorbing film 9302 absorbs the second OTDR reflected light reflected by the optical fiber end face to prevent the second OTDR reflected light from being reflected to the light receiving component 500 through the optical filter 930.

[0290] In some embodiments, the size of the filter 930 is 2 mm, and the light-absorbing film 9302 occupies 1 / 5 to 3 / 10 of the total length of the filter 930 , so that the second OTDR reflected light reflected at the optical fiber end face can be completely absorbed by the light-absorbing film 9302 .

[0291] In this way, the OTDR emission light emitted by the optical emitting component 400 passes through the semi-transparent and semi-reflective film 9301 on the upper side of the optical filter 930 and is emitted into the optical fiber adapter 700. Since the end face of the optical fiber ferrule 704 is tilted, the optical fiber ferrule 704 is tilted, so that the second OTDR reflected light of the OTDR emission light at the end face of the optical fiber is directed toward the light-absorbing film 9302 on the lower side of the optical filter 930. The second OTDR reflected light is absorbed by the light-absorbing film 9302, thereby eliminating the second OTDR reflected light reflected by the end face of the optical fiber and reducing the crosstalk of the second OTDR reflected light to the first OTDR reflected light.

[0292] The optical module provided by the present disclosure can achieve a dual effect using only one filter, which not only satisfies the function of splitting light, but also reduces the crosstalk caused by the reflected light at the end face of the optical fiber, thereby ensuring the OTDR function of the optical module. It can improve the crosstalk defect rate of the optical module by 3% to 5%, greatly improving the yield rate of optical modules with OTDR function.

[0293] In some embodiments, not only can a light-absorbing film be deposited on the lower right side of the filter 930 to absorb and eliminate the second OTDR reflected light reflected from the optical fiber end face, but other structures can also be used to eliminate the second OTDR reflected light reflected from the optical fiber end face.

[0294] Figure 32 is a second structural diagram of a filter in an optical module according to some embodiments of the present disclosure. Figure 33 is a second cross-sectional diagram of an optical transceiver component in an optical module according to some embodiments of the present disclosure. Figure 34 is a second partial cross-sectional diagram of an optical transceiver component in an optical module according to some embodiments of the present disclosure. As shown in Figures 32, 33, and 34, to eliminate the second OTDR reflected light reflected by the OTDR transmitted light at the optical fiber end face, a light absorbing member may be attached to the lower right side of the filter 930. The optical processing member may include a light absorbing member. A small portion of the OTDR transmitted light that passes through the filter 930 is reflected at the optical fiber end face of the optical fiber ferrule 704. The second OTDR reflected light (also referred to as the second reflected light in some examples) reflected by the optical fiber end face strikes the light absorbing member. The light absorbing member absorbs the second OTDR reflected light, thereby eliminating the second OTDR reflected light reflected by the optical fiber end face and reducing the signal crosstalk between the second OTDR reflected light and the first OTDR reflected light of the optical fiber link.

[0295] In some embodiments, the light absorbing element may be a second light absorbing plate 960, which is located on the side of the optical filter 930 away from the second tube mouth 902, that is, the second light absorbing plate 960 is mounted on the lower right side of the optical filter 930, and the size of the second light absorbing plate 960 and the size of the optical filter 930 have a preset ratio, so that the second light absorbing plate 960 can absorb all the second OTDR reflected light reflected by the end face of the optical fiber, thereby eliminating the second OTDR reflected light reflected by the end face of the optical fiber, and avoiding the second OTDR reflected light from being reflected into the light receiving component 500 through the optical filter 930.

[0296] Since the second light absorber 960 is adhesively connected to the optical filter 930, a glue film is coated on the connecting surface of the second light absorber 960 and the optical filter 930 to achieve adhesion of the second light absorber 960 and the optical filter 930 through the glue film. The second light absorber 960 and the optical filter 930 can also be isolated by the glue film to prevent the second OTDR reflected light reflected from the optical fiber end face from passing through the glue film to the optical filter 930, thereby improving the light absorption effect.

[0297] In some embodiments, the size of the filter 930 is 2 mm, and the second light absorber 960 occupies 1 / 5 to 3 / 10 of the total length of the filter 930 , so that the second OTDR reflected light reflected by the optical fiber end face can be completely absorbed by the second light absorber 960 .

[0298] Figure 35 is a third structural diagram of an optical filter in an optical module according to some embodiments of the present disclosure, Figure 36 is a third cross-sectional diagram of an optical transceiver component in an optical module according to some embodiments of the present disclosure, and Figure 37 is a third partial cross-sectional diagram of an optical transceiver component in an optical module according to some embodiments of the present disclosure. As shown in Figures 35, 36, and 37, to eliminate the second OTDR reflected light reflected by the OTDR emitted light at the optical fiber end face, a support bar 9303 can be formed on the side of the filter 930 away from the second nozzle 902 (the lower right side). A light absorber is attached to the support bar 9303 and is parallel to the filter 930. In this way, the OTDR emitted light is reflected at the optical fiber end face of the optical fiber ferrule 704. The second OTDR reflected light reflected by the optical fiber end face hits the light absorber and is absorbed by the light absorber, thereby eliminating the second OTDR reflected light and reducing the signal crosstalk between the second OTDR reflected light reflected by the optical fiber end face and the first OTDR reflected light of the optical fiber link.

[0299] In some embodiments, two support bars 9303 are formed on the lower right side of the filter 930 , with a gap between the two support bars 9303 . The light absorbing element is pasted on the two support bars 9303 to support and fix the light absorbing element.

[0300] In some embodiments, the light absorbing element may be a second light absorbing plate 960, which is pasted on the support bar 9303 of the filter 930. The size of the second light absorbing plate 960 and the size of the filter 930 have a preset ratio, so that the second light absorbing plate 960 can absorb all the second OTDR reflected light reflected by the end face of the optical fiber, thereby eliminating the second OTDR reflected light and avoiding the second OTDR reflected light reflected by the end face of the optical fiber from being reflected into the light receiving component 500 through the filter 930.

[0301] In some embodiments, the second light absorbing plate 960 is supported and fixed on the optical filter 930 by two support bars 9303. The second light absorbing plate 960 is coated with an air dielectric film on the side facing the optical filter 930. When the second light absorbing plate 960 absorbs the second OTDR reflected light reflected by the optical fiber end face, part of the second OTDR reflected light will pass through the second light absorbing plate 960. In this way, when this part of the second OTDR reflected light is incident on the air dielectric film, due to the change of the transmission medium, this part of the second OTDR reflected light is reflected again at the air dielectric film of the second light absorbing plate 960. The re-reflected second OTDR reflected light is absorbed again by the second light absorbing plate 960, thereby improving the light absorption effect.

[0302] In some embodiments, the size of the filter 930 is 2 mm, and the second light absorbing plate 960 occupies 1 / 5 to 3 / 10 of the total length of the filter 930 , so that all light reflected at the end face of the optical fiber can be absorbed by the second light absorbing plate 960 .

[0303] FIG38 is a partial cross-sectional view of the optical transceiver component in the optical module provided according to some embodiments of the present disclosure. As shown in FIG38 , in order to eliminate the second OTDR reflected light reflected by the OTDR emission light at the optical fiber end face, a support plate 970 can also be formed in the round square tube body 910. The support plate 970 is located between the filter 930 and the optical fiber end face, and the support plate 970 is arranged in the vertical direction. A light absorbing element is provided on the side of the support plate 970 facing the optical fiber end face. The light absorbing element is located in the light path of the OTDR emission light reflected at the optical fiber end face. In this way, the OTDR emission light is reflected at the optical fiber end face of the optical fiber ferrule 704. The second OTDR reflected light reflected by the optical fiber end face is absorbed by the light absorbing element, thereby achieving the purpose of eliminating the second OTDR reflected light and reducing the signal crosstalk of the second OTDR reflected light reflected by the optical fiber end face on the first OTDR reflected light of the optical fiber link.

[0304] In some embodiments, the light absorbing member may be a second light absorbing sheet 960, which is adhered to the support plate 970. The size of the second light absorbing sheet 960 and the size of the optical filter 930 have a preset ratio, so that the second light absorbing sheet 960 can absorb all the second OTDR reflected light reflected by the optical fiber end face, thereby eliminating the second OTDR reflected light and avoiding the second OTDR reflected light reflected by the optical fiber end face from being reflected into the light receiving component 500 through the optical filter 930.

[0305] Since the second light absorbing sheet 960 is adhered to the support plate 970, when the second light absorbing sheet 960 absorbs the second OTDR reflected light reflected by the optical fiber end face, part of the second OTDR reflected light will pass through the second light absorbing sheet 960 and be emitted to the support plate 970, while the second OTDR reflected light cannot pass through the support plate 970. The second OTDR reflected light will be reflected again on the support plate 970, and the re-reflected second OTDR reflected light will be absorbed again by the second light absorbing sheet 960, thereby improving the light absorption effect.

[0306] In the optical module provided by the embodiment of the present disclosure, the OTDR emission light emitted by the optical emitting component passes through the filter and enters the optical fiber adapter. Due to the difference in transmission media, part of the OTDR emission light will be reflected at the optical fiber end face of the optical fiber ferrule in the optical fiber adapter to form a second OTDR reflected light. A light absorbing component is provided on the reflected light path of the optical fiber end face. The light absorbing component absorbs the second OTDR reflected light reflected by the optical fiber end face to eliminate the second OTDR reflected light, thereby avoiding signal crosstalk between the second OTDR reflected light reflected by the optical fiber end face and the first OTDR reflected light of the optical fiber link, thereby improving the OTDR performance of the optical module.

[0307] Figure 39 is a cross-sectional view of the optical transceiver component in an optical module provided according to some embodiments of the present disclosure. As shown in Figure 39 , to prevent the second OTDR reflected light from the optical fiber end face from being reflected back into the optical receiving component 500 via the optical filter 930, a light reflecting assembly 980 is further disposed within the square tube 910. The optical processing component may include the light reflecting assembly 980. The light reflecting assembly 980 is located in the reflected light path of the OTDR transmitted light from the optical fiber end face, and the light reflecting assembly 980 is located between the optical filter 930 and the optical fiber ferrule 704. In this way, the second OTDR reflected light reflected from the optical fiber end face is reflected again by the light reflecting assembly 980, preventing the second OTDR reflected light from being reflected back into the optical filter 930, thereby preventing the second OTDR reflected light from being reflected back into the optical receiving component 500 via the optical filter 930.

[0308] A light-through hole is also provided in the square tube body 910, which connects the inner cavity of the square tube body 910 and the fourth tube port 904, and the light-through hole is located between the light reflecting component 980 and the third tube port 903. The second OTDR reflected light reflected by the optical fiber end face is reflected again at the light reflecting component 980, and the re-reflected second OTDR reflected light passes through the light-through hole and is emitted into the fourth tube port 904, so that the second OTDR reflected light reflected by the optical fiber end face enters the fourth tube port 904, and the second OTDR reflected light is diffusely reflected in the cavity of the fourth tube port 904. In this way, the signal crosstalk caused by the second OTDR reflected light to the first OTDR reflected light is reduced.

[0309] In some embodiments, a third light absorbing plate 990 may also be provided in the fourth pipe opening 904. The third light absorbing plate 990 is mounted on the light absorbing plate bracket 9020, and the third light absorbing plate 990 is located below the light through hole. In this way, the second OTDR reflected light passing through the light through hole is absorbed by the third light absorbing plate 990, which can eliminate the second OTDR reflected light reflected by the optical fiber end face, thereby further reducing the signal crosstalk caused by the second OTDR reflected light to the first OTDR reflected light.

[0310] In order to install the third light-absorbing sheet 990, a notch is also formed on the support column 9202, and the notch includes a first support surface 9207 and a second support surface 9208. The first support surface 9207 is connected to the outer edge of the support column 9202, and the first support surface 9207 is horizontally arranged; the second support surface 9208 is connected to the first support surface 9207, and the second support surface 9208 is perpendicular to the first support surface 9207. In this way, the first support surface 9207 and the second support surface 9208 form an L-shaped structure.

[0311] The second supporting surface 9208 is located between the assembly surface 9203 and the first supporting surface 9207. The second supporting surface 9208 is connected to the first supporting surface 9208 through the connecting surface 9209. The connecting surface 9209 is tilted, that is, along the light emission direction, the connecting surface 9209 tilts from the upper left to the lower right.

[0312] The third light absorbing sheet 990 is located in the notch of the support column 9202, that is, the left side of the third light absorbing sheet 990 is against the connecting surface 9209, and the right side of the third light absorbing sheet 990 is against the first supporting surface 9207. The first supporting surface 9207, the second supporting surface 9208 and the third light absorbing sheet 990 form a triangular structure, thereby fixing the third light absorbing sheet 990 on the light absorbing sheet bracket 9020.

[0313] The light reflecting component 980 reflects the second OTDR reflected light reflected by the optical fiber end face again into the fourth pipe mouth 904. The re-reflected second OTDR reflected light is absorbed by the third light absorbing plate 990, which can eliminate the second OTDR reflected light reflected by the OTDR emission light at the optical fiber end face, thereby reducing the signal crosstalk of the second OTDR reflected light to the first OTDR reflected light of the optical fiber link.

[0314] Figure 40 is a structural diagram of a light reflective assembly in an optical module according to some embodiments of the present disclosure, Figure 41 is an exploded view of a light reflective assembly in an optical module according to some embodiments of the present disclosure, Figure 42 is a structural diagram of a lens holder in an optical module according to some embodiments of the present disclosure, and Figure 43 is a side view of a lens holder in an optical module according to some embodiments of the present disclosure. As shown in Figures 40-43, the light reflective assembly includes a lens holder 9801 and a converging lens 9802. The lens holder 9801 is installed between the filter 930 and the optical fiber end face. The side of the lens holder 9801 facing the optical fiber end face is formed with a reflective surface 9805. The reflective surface 9805 is located in the reflection light path of the OTDR transmitted light at the optical fiber end face. The second OTDR reflected light reflected by the optical fiber end face is reflected again at the reflective surface 9805.

[0315] Along the light emission direction of the optical transceiver component 900, the reflecting surface 9805 is tilted from the lower left to the upper right. The reflecting surface 9805 reflects the second OTDR reflected light to the lower right, so that the second OTDR reflected light reflected by the optical fiber end face is away from the filter 930 and the light receiving component 500.

[0316] The converging lens 9802 is installed on the lens bracket 9801. The converging lens 9802 is located below the reflecting surface 9805. The converging lens 9802 converges the second OTDR reflected light reflected again by the reflecting surface 9805, and the converged light passes through the light hole and enters the cavity of the fourth pipe mouth 904, so that the second OTDR reflected light reflected again by the light reflecting component 980 is diffusely reflected in the cavity of the fourth pipe mouth 904.

[0317] 42 , in some embodiments, the lens holder 9801 includes a bottom surface, a top surface 9804, a first side surface 9803 and a reflective surface 9805. The bottom surface is horizontally fixed on the inner wall of the square tube 910, and the top surface 9804 is horizontally arranged. The area of ​​the top surface 9804 is larger than the area of ​​the bottom surface, and the OTDR emission light passing through the filter 930 does not pass through the top surface 9804 to avoid the lens holder 9801 affecting the transmission of the OTDR emission light.

[0318] The first side surface 9803 and the reflecting surface 9805 are located on the same side of the lens holder 9801, the first side surface 9803 is vertically arranged, the reflecting surface 9805 is inclined, and the first side surface 9803 is connected to the reflecting surface 9805; an installation groove 9806 is formed on the first side surface 9803, and the extension direction of the installation groove 9806 is perpendicular to the light emission direction of the optical transceiver component 900, and the converging lens 9802 is embedded in the installation groove 9806 to realize the connection between the lens holder 9801 and the converging lens 9802.

[0319] In order to make the second OTDR reflected light reflected by the end face of the optical fiber be reflected again by the reflecting surface 9805 to the converging lens 9802, and the second OTDR reflected light reflected again be converged into the cavity of the fourth pipe mouth 904 by the converging lens 9802, the height dimension of the lens bracket 9801 is L1, and there is a third preset angle α between the reflecting surface 9805 and the light emission direction, and the size of the reflecting surface 9805 is L2.

[0320] In some embodiments, the height dimension L1 of the lens holder 9801 is 0.82 cm, the dimension L2 of the reflecting surface 9805 is 0.48 cm, the dimension L3 between the right end face of the converging lens 9802 and the right end face of the lens holder 9801 is 0.12 cm, and the third preset angle α matches the first preset angle and the second preset angle. When the first preset angle is 3.7° and the second preset angle is 8°, the third preset angle α is 56.7°.

[0321] In some embodiments, the lens bracket 9801 may be a metal bracket, the reflective surface 9805 may be a metal surface, the metal surface is polished for reflection, and then the converging lens 9802 is mounted on the metal bracket.

[0322] In some embodiments, the lens holder 9801 may also be a glass holder, with a reflective film coated on the glass reflective surface so that the reflective surface reflects the reflected light from the optical fiber end face, and then the converging lens 9802 is mounted on the glass holder.

[0323] Figure 44 is a structural diagram of a converging lens in an optical module according to some embodiments of the present disclosure. As shown in Figure 44, converging lens 9802 is a spherical lens. A plug-in block 9807 is formed on converging lens 9802. Plug-in block 9807 wraps around converging lens 9802. The left side of plug-in block 9807 is inserted into mounting slot 9806 to secure converging lens 9802 to lens bracket 9801.

[0324] Figure 45 is a partial cross-sectional view of an optical transceiver component in an optical module according to some embodiments of the present disclosure. As shown in Figure 45 , OTDR emission light transmitted through filter 930 is coupled into fiber optic ferrule 704 to transmit the OTDR emission light to external optical fiber 101. Due to changes in the transmission medium, some of the OTDR emission light is reflected at the fiber end face of fiber ferrule 704. Since fiber ferrule 704 is tilted, the fiber end face of fiber ferrule 704 is tilted. Therefore, the second OTDR reflected light reflected from the fiber end face is emitted to the lower left.

[0325] The second OTDR reflected light is reflected again at the reflecting surface 9805 of the lens holder 9801, and the reflected second OTDR reflected light is incident into the converging lens 9802. The reflected second OTDR reflected light is converged into the fourth pipe mouth 904 through the converging lens 9802, and the converged light is absorbed by the third light absorbing plate 990 in the fourth pipe mouth 904.

[0326] Since the third light absorbing plate 990 has a certain mirror reflection, the third light absorbing plate 990 will reflect part of the re-reflected light that is not absorbed. The re-reflected light that is not absorbed is diffusely reflected in the cavity of the fourth tube mouth 904. Since the size of the light hole is small, the diffusely reflected light cannot pass through the light hole and enter the inner cavity of the square tube body 910, thereby reducing the leakage of the diffusely reflected light outside the cavity of the fourth tube mouth 904. The diffusely reflected light will not cause signal crosstalk to the first OTDR reflected light of the optical fiber link.

[0327] The second OTDR reflected light that is not absorbed by the third light absorbing plate 990 may pass through the third light absorbing plate 990. The second OTDR reflected light that passes through the third light absorbing plate 990 is projected onto the first supporting surface 9207 and the second supporting surface 9208. The second OTDR reflected light is reflected again at the first supporting surface 9207 and the second supporting surface 9208, so that the second OTDR reflected light is absorbed by the third light absorbing plate 990, thereby improving the light absorption effect.

[0328] In some embodiments, the second OTDR reflected light reflected by the optical fiber end face is reflected into the cavity of the fourth pipe opening 904 by the light reflecting component 980. The light reflecting component 980 can be a split structure or an integrated structure.

[0329] FIG46 is a second structural diagram of a light-reflecting assembly in an optical module according to some embodiments of the present disclosure, and FIG47 is a side view of a light-reflecting assembly in an optical module according to some embodiments of the present disclosure. As shown in FIG46 and FIG47 , the light-reflecting assembly 980 includes a lens holder 9801 and a converging lens 9802. The side of the lens holder 9801 facing the optical fiber ferrule 704 is formed with a reflecting surface 9805 and a support block. The support block protrudes from the right side of the lens holder 9801, and the lower end of the reflecting surface 9805 is connected to the support block. The converging lens 9802 is a spherical lens. The converging lens 9802 is fixed to the support block, and the lens holder 9801 and the converging lens 9802 are an integrated structure, which directly realizes the optical coupling between the reflecting surface 9805 and the converging lens 9802 without the need for additional coupling and docking.

[0330] In order to make the second OTDR reflected light reflected by the end face of the optical fiber be reflected again through the reflecting surface 9805 to the converging lens 9802, and the second OTDR reflected light reflected again be converged into the cavity of the fourth pipe mouth 904 through the converging lens 9802, the height dimension of the lens bracket 9801 is L1, the reflecting surface 9805 has a third preset angle α with the light emission direction, the size of the reflecting surface 9805 is L2, and the right end face of the converging lens 9802 and the right end face of the lens bracket 9801 have a size L3.

[0331] In some embodiments, the height dimension L1 of the lens holder 9801 is 0.82 cm, the dimension L2 of the reflecting surface 9805 is 0.48 cm, the dimension L3 between the right end face of the converging lens 9802 and the right end face of the lens holder 9801 is 0.12 cm, and the third preset angle α between the reflecting surface 9805 and the light emission direction is 56.7°.

[0332] Figure 48 is a second partial cross-sectional view of an optical transceiver component in an optical module according to some embodiments of the present disclosure. As shown in Figure 48, the OTDR transmission light emitted by the optical transmitting component 400 is transmitted through the optical isolator to the filter 930. A portion of the OTDR transmission light is directly transmitted through the filter 930 and coupled to the optical fiber ferrule 704 of the optical fiber adapter 700, thereby transmitting the OTDR transmission light to the external optical fiber 101. The OTDR transmission light is reflected at each node of the optical fiber to generate a first OTDR reflection light. The first OTDR reflection light is transmitted into the square tube 910 via the optical fiber adapter 700. The first OTDR reflection light is reflected by the filter 930 to the optical receiving component 500, thereby detecting whether there is any abnormality in the optical fiber link.

[0333] Since the optical fiber ferrule 704 is tilted relative to the light emission direction of the optical transceiver component 900, there is an angle between the OTDR emission light entering the optical fiber ferrule 704 and the first OTDR reflected light emitted by the optical fiber ferrule 704. When the first OTDR reflected light is emitted to the optical filter 930, the first OTDR reflected light cannot pass through the optical filter 930. The first OTDR reflected light can only be reflected at the optical filter 930, thereby ensuring the luminescence performance of the light emitting component 400 and improving the OTDR detection performance of the optical module.

[0334] Part of the OTDR emission light is reflected at the filter 930, and the reflected light is emitted into the fourth pipe mouth 904 through the third light hole 908. The reflected light is absorbed by the first light absorbing plate 940 in the fourth pipe mouth 904, thereby preventing the reflected light of the OTDR emission light at the filter 930 from causing crosstalk to the first OTDR reflected light.

[0335] Due to the difference in transmission media, part of the OTDR emission light that passes through the filter 930 is reflected at the optical fiber end face of the optical fiber ferrule 704, and the second OTDR reflected light reflected from the optical fiber end face is emitted to the lower left, and the second OTDR reflected light is reflected again at the reflecting surface 9805 of the lens holder 9801, and the second OTDR reflected light is emitted into the converging lens 9802, and the second OTDR reflected light is converged into the fourth pipe mouth 904 through the converging lens 9802, and the second OTDR reflected light is absorbed by the third light absorbing plate 990 in the fourth pipe mouth 904, thereby avoiding crosstalk between the second OTDR reflected light and the first OTDR reflected light.

[0336] In the optical module provided by the embodiment of the present disclosure, the light emitting component, the light receiving component and the optical fiber adapter are respectively inserted into the square tube body, and a light reflecting component is added between the filter in the square tube body and the optical fiber end face of the optical fiber core of the optical fiber adapter. The OTDR emission light generated by the light emitting component passes through the filter and enters the optical fiber end face. The second OTDR reflected light reflected from the optical fiber end face is reflected and converged by the light reflecting component, so that the second OTDR reflected light reflected from the optical fiber end face is converged into the cavity below the square tube body. A third light absorbing plate is added in the cavity, and the second OTDR reflected light entering the cavity is absorbed by the third light absorbing plate. The second OTDR reflected light not absorbed by the third light absorbing plate is diffusely reflected in the cavity, thereby preventing the second OTDR reflected light from leaking into the light receiving component, thereby reducing the signal crosstalk of the second OTDR reflected light on the first OTDR reflected light of the optical fiber link, and ensuring the OTDR performance of the optical module.

[0337] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An optical module, comprising: An optical transceiver component configured to transmit and receive optical signals; an optical fiber adapter, optically connected to the optical transceiver component, the optical fiber adapter comprising an optical fiber ferrule, the optical fiber ferrule is tilted, and a second preset angle is formed between the central axis of the optical fiber ferrule and the light emission direction of the optical transceiver component; an optical fiber end face of the optical fiber ferrule is tilted, and a first preset angle is formed between the optical fiber end face and a vertical plane, and the first preset angle is greater than the second preset angle; Wherein, the optical transceiver component includes: The tube body has a light-extinction cavity; the light-extinction cavity is connected with the inner cavity of the tube body through a light-through hole; a light emitting component, arranged opposite to the optical fiber adapter, connected to the tube body, and configured to emit emission light; the emission light is incident on the optical fiber through the optical fiber adapter, and is reflected in the optical fiber to form a first reflected light; An optical component is placed in the tube body; the optical component includes: A filter, located in the inner cavity of the tube body and between the light emitting component and the optical fiber adapter; configured to reflect and transmit the emitted light and the first reflected light; An isolator, located at the light-through hole, located on the reflected light path of the emitted light reflected by the filter, and used to reduce the crosstalk light returned from the extinction cavity to the inner cavity of the tube body; A matte element, mounted on the inner wall of the matte cavity, for reducing crosstalk light incident on the matte element, wherein the crosstalk light includes reflected light formed after the emitted light is reflected at the filter; an optical processing element, located on a reflected light path of the emitted light reflected by the optical fiber end face, and configured to process a second reflected light formed by the emitted light reflected by the optical fiber end face; A light receiving component is arranged opposite to the extinction cavity, connected to the tube body, and configured to receive the first reflected light; the light receiving component has a receiving tube cap, the receiving tube cap is provided with a first lens, the outer cover of the first lens is provided with a light blocking member, the light blocking member has a first light through hole, the first light through hole is located on the reflected light path of the first reflected light reflected by the filter, so as to allow the first reflected light to be incident on the light receiving component after being reflected by the filter; the optical processing component is configured to prevent the second reflected light from being incident on the first light through hole.

2. The optical module according to claim 1, wherein: The optical processing element comprises: The first light absorbing member is configured to absorb the second reflected light formed by the emission light reflected by the end face of the optical fiber; the light absorbing surface of the first light absorbing member is tilted so that the second reflected light is reflected by the light absorbing surface to form an area of ​​the light blocking member except the first light hole.

3. The optical module according to claim 2, wherein: The first end face of the tube body is tilted, and the first end face has the second preset angle with the vertical plane, so that the central axis of the optical fiber ferrule and the light emitting direction of the optical transceiver component have the second preset angle; The light absorbing surface of the first light absorbing member is tilted so that there is a third preset angle between the light absorbing surface and the horizontal plane; The first preset angle, the second preset angle and the third preset angle satisfy a first preset relationship, and the first preset angle and the second preset angle satisfy a second preset relationship, wherein the first end face of the tube body is a side of the tube body facing away from the light emitting component.

4. The optical module according to claim 3, wherein: The second end face of the tube body is tilted, opposite to the first end face, and parallel to the first end face, wherein the second end face of the tube body is the side of the tube body facing away from the optical fiber adapter.

5. The optical module according to claim 1, wherein: The light-blocking member includes a first light-blocking portion and a second light-blocking portion, one end of the first light-blocking portion is connected to the receiving tube cap, the other end of the first light-blocking portion is connected to the second light-blocking portion, the second light-blocking portion has the first light-through hole, the size of the first light-blocking portion is larger than the size of the first lens, and the radius of the first light-blocking portion is larger than the radius of the first light-through hole.

6. The optical module according to claim 1, wherein: The tube body has a first supporting surface and a second supporting surface, the optical filter is arranged on the first supporting surface, and the first light absorbing member is arranged on the second supporting surface; The first supporting surface is inclined, the second supporting surface is horizontally arranged, a connecting plate is arranged between the first supporting surface and the second supporting surface, the connecting plate includes a first connecting surface and a second connecting surface, the first connecting surface is connected to the first supporting surface, the second connecting surface is connected to the second supporting surface, the first connecting surface is in contact with and connected to an end surface of the optical filter to carry the optical filter, and the second connecting surface is in contact with and connected to an end surface of the first light absorbing member to make the first light absorbing member stop in front of the connecting plate; The first supporting surface is perpendicular to the first connecting surface, the second supporting surface is perpendicular to the second connecting surface, and the angle between the first connecting surface and the second connecting surface is equal to the angle between the first supporting surface and the horizontal plane.

7. The optical module according to claim 1, wherein: The extinction cavity has a first mounting surface, a second mounting surface and a third mounting surface, the second mounting surface is arranged opposite to the first mounting surface, the second mounting surface serves as the other end surface of the light-through hole, the first mounting surface and the second mounting surface are connected via the third mounting surface, The matte piece includes a first matte piece and a second matte piece. The first matte piece is mounted on the first mounting surface. The first matte piece is used to reduce the crosstalk light incident thereon. One side of the second matte piece is connected to the second mounting surface. The other side of the second matte piece is connected to the third mounting surface. The matte surface of the second matte piece is arranged opposite to the first matte piece.

8. The optical module according to claim 7, wherein: The second matte piece is a reflective sheet, and a reflective surface of the reflective sheet is arranged opposite to the first matte piece to receive the crosstalk light reflected by the first matte piece to the reflective surface, and reflect the crosstalk light incident to the reflective surface to the first matte piece.

9. The optical module according to claim 7, wherein: The first light-extinguishing member is a light-transmitting member, and the light-extinguishing cavity is a pipe opening, so that the crosstalk light incident on the light-transmitting member can be transmitted out.

10. The optical module according to claim 1, wherein: The isolating member includes a first isolating portion and a second isolating portion, the first isolating portion is connected to the second isolating portion, a light-through hole formed by the first isolating portion is connected to a light-through hole formed by the second isolating portion, a size of the light-through hole formed by the first isolating portion is smaller than a size of the light-through hole formed by the second isolating portion, and the first isolating portion is closer to the extinction cavity than the second isolating portion; From the extinction cavity to the cavity of the tube body, the size of the light-through hole increases from small to large.

11. The optical module according to claim 1, wherein: The isolator is an isolator configured to block the crosstalk light in the extinction cavity from returning to the inner cavity of the tube body; From the extinction cavity to the cavity of the tube body, the size of the light-through hole remains unchanged.

12. The optical module according to claim 1, further comprising: Circuit boards; The optical transceiver component is electrically connected to the circuit board; The side wall of the tube body is respectively provided with a first tube opening, a second tube opening and a third tube opening, the first tube opening, the second tube opening and the third tube opening are connected to the inner cavity of the tube body; the first tube opening is arranged opposite to the third tube opening, and the second tube opening is located between the first tube opening and the third tube opening. The optical fiber ferrule is inserted into the third pipe opening; The light receiving component is connected to the second pipe opening, and the light receiving component is configured to receive the first reflected light reflected by the filter, where the first reflected light is used to detect the OTDR.

13. The optical module according to claim 12, wherein: The light processing component is a light absorbing film, which is plated on a side of the optical filter away from the second tube opening, and a size of the light absorbing film and a size of the optical filter have a preset ratio.

14. The optical module according to claim 12, wherein: The optical processing component is a second light absorbing sheet, which is mounted on the optical filter and located on a side of the optical filter away from the second tube opening. The size of the second light absorbing sheet is in a preset ratio to the size of the optical filter.

15. The optical module according to claim 12, wherein: The optical processing component is a second light absorbing plate, a support bar is formed on the side of the filter away from the second tube opening, the second light absorbing plate is mounted on the support bar, the second light absorbing plate is parallel to the filter, and the size of the second light absorbing plate and the size of the filter have a preset ratio.

16. The optical module according to claim 12, wherein: A support plate is formed in the tube body, the support plate is located between the filter and the optical fiber end face, and the support plate is arranged in a vertical direction; The light processing component is a second light absorbing sheet, the second light absorbing sheet is mounted on the support plate, and the second light absorbing sheet is perpendicular to the light emitting direction of the light emitting component.

17. The optical module according to any one of claims 13 to 16, wherein: The size of the optical processing component is 1 / 5 to 3 / 10 of the size of the filter.

18. The optical module according to claim 1, wherein: The second preset angle is 3.7° to 5.8°, and the first preset angle is 8° to 12°.

19. The optical module according to claim 18, wherein: The second preset angle is 3.7°, and the first preset angle is 8°.

20. The optical module according to claim 12, wherein: A fourth pipe opening is also provided on the side wall of the tube body, the fourth pipe opening is located between the first pipe opening and the third pipe opening, the second pipe opening and the fourth pipe opening are located on different side walls of the tube body, and the fourth pipe opening is communicated with the inner cavity of the tube body; The optical component also includes a first light absorbing plate, which is arranged in the fourth pipe opening through a light absorbing plate bracket. The filter is used to split the emitted light into a first OTDR light and a second OTDR light. The first OTDR light is emitted into the optical fiber adapter through the filter, and the second OTDR light is reflected to the first light absorbing plate. The first light absorbing plate is used to absorb the second OTDR light.

21. The optical module according to claim 20, wherein: A light-transmitting hole is formed in the tube body, and the fourth tube opening is connected to the inner cavity of the tube body through the light-transmitting hole. The diameter of the light-transmitting hole is smaller than the diameter of the fourth tube opening, so that the second OTDR spectroscopic light cannot be reflected again into the inner cavity of the tube body through the light-transmitting hole, and the second OTDR spectroscopic light is reflected and absorbed in the fourth tube opening.

22. The optical module according to claim 20, wherein: The optical processing element comprises: a light reflecting component, disposed in the inner cavity of the tube body, the light reflecting component being located on the reflected light path of the emitted light on the end face of the optical fiber, the light reflecting component being located between the optical filter and the end face of the optical fiber, and the light reflecting component being used to reflect and converge the second reflected light into the fourth tube opening; The matting element comprises: The light absorbing component is embedded in the fourth pipe opening, and is used for absorbing the second reflected light in the fourth pipe opening.

23. The optical module according to claim 22, wherein: The light reflecting assembly comprises: A lens holder is installed in the inner cavity of the tube body, and a reflective surface is formed on a side of the lens holder facing the optical fiber ferrule, the reflective surface is inclined, and the reflective surface is configured to reflect the second reflected light reflected by the optical fiber end face again; A converging lens is mounted on the lens bracket, and the converging lens is configured to converge the second reflected light from the reflecting surface into the fourth pipe opening.

24. The optical module according to claim 23, wherein: The lens bracket includes a bottom surface, a top surface and a first side surface, the bottom surface is horizontally fixed on the inner wall of the tube body, the area of ​​the top surface is larger than the area of ​​the bottom surface, and the reflection surface is inclined from the side of the top surface facing the optical fiber end surface to the side of the top surface facing the filter; The first side surface and the reflecting surface are located on the same side of the lens bracket, a mounting groove is formed on the first side surface, the first side surface is connected to the mounting groove, and the converging lens is embedded in the mounting groove.

25. The optical module according to claim 24, wherein: A plug-in column is formed on the converging lens, and the plug-in column wraps the converging lens. One end of the plug-in column is inserted into the installation groove.

26. The optical module according to claim 23, wherein: A support block is formed on one side of the lens bracket facing the optical fiber ferrule, the converging lens is fixed on the support block, and the lens bracket and the converging lens are an integrated structure.

27. The optical module according to claim 24 or 26, wherein: There is a fourth preset angle between the reflecting surface and the top surface of the lens holder, and there is a preset relationship among the fourth preset angle, the first preset angle and the second preset angle, so that the second reflected light is reflected again by the reflecting surface and then incident on the fourth pipe opening.

28. The optical module according to claim 27, wherein: The fourth preset angle is 56.7°.

29. The optical module according to claim 22, wherein: The light absorbing component comprises: A light absorbing sheet bracket is embedded in the fourth pipe opening; a first light absorbing plate, mounted on the light absorbing plate bracket, the first light absorbing plate being located on the reflected light path of the optical filter, and the first light absorbing plate being configured to absorb reflected light from the optical filter; A third light absorbing sheet is mounted on the light absorbing sheet bracket. The third light absorbing sheet is located on the reflection and convergence light path of the light reflecting component. The third light absorbing sheet is configured to absorb the second reflected light from the light reflecting component.

30. The optical module according to claim 29, wherein: The light absorbing sheet support comprises: A support platform, embedded in the fourth pipe opening; A support column is installed on the support platform, an assembly surface is formed on the support column, the assembly surface is inclined, and the first light absorbing sheet is installed on the assembly surface; a notch is also formed on the support column, the notch is connected to the assembly surface through a connecting surface, and the third light absorbing sheet is obliquely installed in the notch.

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