Optical components

Abstract

The present application relates to an optical component, including a base, having a first through hole and a second through hole, the axial direction of the first through hole and the axial direction of the second through hole being perpendicular to each other; a pigtail unit, arranged on a first side of the first through hole; the pigtail unit includes an adapter and a first collimating lens, the adapter is connected to the first collimating lens, the adapter is used to receive an external optical signal and transmit it through the first collimating lens; a light receiving unit, arranged in the second through hole; wherein the light receiving unit includes a light receiving module and a second collimating lens, the external optical signal transmitted through the first collimating lens can be transmitted to the light receiving module through the second collimating lens; and a light emitting unit, arranged on the second side of the first through hole; wherein the light emitting module includes a light emitting module and a third collimating lens, the optical signal emitted by the light emitting module is transmitted to the pigtail unit through the third collimating lens, which can accurately separate short-distance wavelength light and reduce performance loss of the optical component.

Description

Technical Field

[0001] The present application relates to the field of optoelectronic communication technology, and in particular to an optical component. Background Art

[0002] With the rapid development of optoelectronic communication technology, the market demand for it has increased dramatically, and optoelectronic products have been used more and more widely.

[0003] With the in-depth research on the signal transmission technology of optoelectronic products, Passive Optical Network (PON) technology is a broadband access technology based on optical distribution network (ODN). It originated from the early ATM passive optical network (APON) / broadband passive optical network (BPON). It adopts point-to-multipoint master station (P2MP) topology, independent upstream and downstream transmission wavelengths, and data time-division multiplexing, which can provide users with up to 100M broadband access capabilities.

[0004] Among them, the application of 50G PON has improved the access network capabilities, achieving a comprehensive improvement in large bandwidth, low latency guarantee and channelization capabilities. When in multiple application scenarios, for the 50Gbps bandwidth requirement, multi-wavelength superposition technology and channel bonding technology are used to provide two 25Gbps channels, thereby achieving a 50Gbps rate.

[0005] However, the technologies involved in 50G PON will affect the wavelength of light. The separation of wavelengths with close wavelengths is not complete, which increases the performance loss of optical components. Summary of the invention

[0006] The present application provides an optical component that can accurately separate short-distance wavelength light and reduce performance loss of the optical component.

[0007] The present application provides an optical component, including a base, having a first through hole and a second through hole, the axial direction of the first through hole and the axial direction of the second through hole being perpendicular to each other; a pigtail unit, arranged on a first side of the first through hole; the pigtail unit includes an adapter and a first collimating lens, the adapter is connected to the first collimating lens, the adapter is used to receive an external optical signal and transmit it through the first collimating lens; a light receiving unit, arranged in the second through hole; wherein the light receiving unit includes a light receiving module and a second collimating lens, and the external optical signal transmitted through the first collimating lens can be transmitted to the light receiving module through the second collimating lens; and a light emitting unit, arranged on the second side of the first through hole; wherein the light emitting module includes a light emitting module and a third collimating lens, and the optical signal emitted by the light emitting module is transmitted to the pigtail unit through the third collimating lens.

[0008] In a possible implementation, the light receiving unit includes a limiting kit, and the second collimating lens is installed in the second through hole through the limiting kit; the limiting kit is provided with a first limiting groove, the first limiting groove passes through the limiting kit, and at least part of the structure of the second collimating lens is arranged in the first limiting groove; wherein, the inner diameter dimension of the side of the first limiting groove close to the light receiving module is larger than the inner diameter dimension of the side of the first limiting groove away from the light receiving module.

[0009] In a possible implementation, the limiting kit is provided with two support columns, and the two support columns are arranged along the radial direction of the limiting kit; wherein the support columns are located on a side of the limiting kit away from the optical receiving module.

[0010] In a possible implementation manner, the limiting kit is made of metal material.

[0011] In a possible implementation, the light receiving unit also includes a first filter arranged in the first through hole and a second filter arranged in the second through hole; the first filter is located at the intersection of the axis of the second through hole and the axis of the first through hole, and a first preset angle is formed between the first filter and the axis of the first through hole; the second filter is connected to the limiting kit, and a second preset angle is formed between the second filter and the axis of the first through hole; the external light signal received from the adapter is reflected by the first filter, transmitted along the second through hole, transmitted through the second filter, and enters the light receiving module.

[0012] In a possible implementation, the first preset angle is 45°, and the second preset angle is 0°.

[0013] In a possible implementation, the light emitting unit further includes a mounting seat, and the light emitting module is mounted on the base via the mounting seat; wherein the mounting seat includes a ring and a convex tube, the convex tube is connected to the base via the ring, and the light emitting module is mounted on the convex tube.

[0014] In a possible implementation manner, the light emitting unit includes an isolator connected to the third collimating lens, and the isolator is located on a side of the third collimating lens away from the pigtail unit.

[0015] In one possible implementation, the adapter includes a fiber optic ferrule and a shell; the shell is provided with a second limiting groove, the fiber optic ferrule is embedded in the second limiting groove, the first collimating lens is connected to the fiber optic ferrule, and at least part of the structure of the first collimating lens is located in the second limiting groove; the shell is connected to the base, and a fiber optic connection port is provided at one end of the shell away from the first collimating lens.

[0016] In a possible implementation manner, the wavelength of the optical signal received by the optical receiving module is 1342 nm.

[0017] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0018] The optical component provided in the embodiment of the present application, the first collimating lens, the second collimating lens and the third collimating lens can ensure that the external optical signal and the divergent light emitted by the optical transmission module are converted into parallel light and transmitted smoothly in the base to reduce the wavelength light loss caused by incomplete separation due to the close distance between the wavelength bands. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0022] Figure 1A schematic diagram of the structure of an optical component provided in an embodiment of the present application;

[0023] Figure 2 A top view of an optical component provided in an embodiment of the present application;

[0024] Figure 3 for Figure 2 AA section view shown;

[0025] Figure 4 A schematic diagram of the structure of a light emitting unit provided in an embodiment of the present application;

[0026] Figure 5 A schematic diagram of the structure of the base provided in the embodiment of the present application;

[0027] Figure 6 A schematic diagram of the structure of the limiter kit provided in an embodiment of the present application.

[0028] Description of reference numerals:

[0029] 1. base; 11. first through hole; 111. limit plate; 12. second through hole;

[0030] 2. light emitting unit; 21. light emitting module; 22. third collimating lens; 23. mounting seat; 231. collar; 232. convex tube; 24. isolator;

[0031] 3. Pigtail unit; 31. Adapter; 311. Optical fiber ferrule; 312. Housing; 3121. Second limiting groove; 3122. Optical fiber connection port; 32. First collimating lens;

[0032] 4. Light receiving unit; 41. Light receiving module; 42. Second collimating lens; 43. Limiting kit; 431. First limiting groove; 432. Support column; 44. First filter; 45. Second filter. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0034] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0035] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0036] In order to solve the technical problem in the prior art that wavelength light with close wavelength bands is not completely separated, which increases the performance loss of optical components, the present application provides an optical component, in which a first collimating lens, a second collimating lens and a third collimating lens can ensure that the external optical signal and the divergent light emitted by the optical transmission module are converted into parallel light and transmitted smoothly in the base to reduce the wavelength light loss caused by incomplete separation due to the close wavelength bands.

[0037] Figure 1 A schematic diagram of the structure of an optical component provided in an embodiment of the present application; Figure 2 A top view of an optical component provided in an embodiment of the present application; Figure 3 for Figure 2 AA section view shown; Figure 4 A schematic diagram of the structure of a light emitting unit provided in an embodiment of the present application; Figure 5 A schematic diagram of the structure of the base provided in the embodiment of the present application; Figure 6 A schematic diagram of the structure of the limiter kit provided in an embodiment of the present application.

[0038] In some exemplary embodiments, Figure 1-Figure 3 , Figure 5 As shown, an optical component is applied to a 50G PON project to improve the product performance of 50G PON.

[0039] The optical assembly comprises a base 1, a light emitting unit 2, a pigtail unit 3 and a light receiving unit 4, so as to realize the sending and receiving of optical signals.

[0040] The base 1 has a first through hole 11 and a second through hole 12. The axial direction of the first through hole 11 (refer to Figure 3 X-axis shown) and the axial direction of the second through hole 12 (refer to Figure 3 The Y-axes shown) are perpendicular to each other.

[0041] The first through hole 11 has a first side and a second side along its axial direction, and the pigtail unit 3 is arranged on the first side. The pigtail unit 3 includes an adapter 31 and a first collimating lens 32, and the adapter 31 is connected to the first collimating lens 32. The adapter 31 is used to receive an external optical signal, pass through the first collimating lens 32, enter the interior of the base 1, and transmit in the first through hole 11.

[0042] The first collimating lens 32 can be fixedly connected to the adapter 31 by bonding, so that the connection between the first collimating lens 32 and the adapter 31 is more reliable. The first collimating lens 32 is used to collimate the external light signal received from the adapter 31, so that it forms parallel light and enters the first through hole 11.

[0043] The light receiving unit 4 is disposed in the second through hole 12, and includes a light receiving module 41 and a second collimating lens 42. The light receiving module 41 is located on the outside, that is, on the side away from the first through hole 11, so that the parallel light collimated by the first collimating lens 32 can enter the light receiving module 41 after being collimated by the second collimating lens 42. The second collimating lens 42 can further correct the optical signal to ensure that the optical signal received by the light receiving module 41 is in a state of parallel light. Among them, the wavelength light emitted by the light receiving module 41 is 1286nm.

[0044] The light emitting unit 2 is arranged on the second side of the first through hole 11, opposite to the pigtail unit 3, and located on the same axis. The light emitting unit 2 includes a light emitting module 21 and a third collimating lens 22. The light emitting module 21 is located on the outside, that is, on the side away from the first through hole 11, so that the optical signal emitted by the light emitting module 21 can be collimated and transformed by the third collimating lens 22 to become parallel light, and transmitted to the pigtail unit 3 along the first through hole 11.

[0045] The light emitting unit 2 and the pigtail unit 3 are arranged opposite to each other and are both located on the axis of the first through hole 11, so that the axis of the third collimating lens 22 and the axis of the first collimating lens 32 coincide with the axis of the first through hole 11, and the axis of the third collimating lens 22 and the axis of the first collimating lens 32 are maintained on the same horizontal line, ensuring that the scattered light emitted by the light emitting module 21 can be converted into smooth parallel light and enter the combining channel, which is the first through hole 11.

[0046] By using the second collimating lens 42 , the third collimating lens 22 and the first collimating lens 32 in the optical assembly, it can be ensured that the optical signal entering the base 1 is transmitted completely in the state of parallel light in the combining channel and the second through hole 12 , and is received by the optical receiving unit 4 and the pigtail unit 3 .

[0047] In some exemplary embodiments, Figure 1 , Figure 3 , Figure 6 As shown, the light receiving unit 4 includes a limiting kit 43 , and the second collimating lens 42 is installed in the second through hole 12 through the limiting kit 43 .

[0048] The position limiting kit 43 is made of metal material, for example, and is in the shape of a semicircular cover, so that it has strong thermal conductivity. When the light receiving module 41 is working, it will generate heat. If the heat is too high, it will affect the connection of surrounding components. The position limiting kit 43 made of metal material can conduct heat, which can improve the temperature rise of the surrounding environment of the light receiving unit 4 and ensure the connection effect of each component.

[0049] The limiting kit 43 is provided with a first limiting groove 431, for example, and the first limiting groove 431 runs through the limiting kit 43 to ensure that the optical signal can be transmitted normally. Among them, at least part of the structure of the second collimating lens 42 is arranged in the first limiting groove 431, for example, the convex lens side of the second collimating lens 42 is located in the first limiting groove 431. The second collimating lens 42 can be connected to the inner wall of the groove of the first limiting groove 431 by bonding, so that the connection between the second collimating lens 42 and the limiting kit 43 is more reliable.

[0050] Among them, the first limiting groove 431 is, for example, in the shape of a truncated cone, so that the inner diameter of the side of the first limiting groove 431 close to the light receiving unit 4 is larger than the inner diameter of the side of the first limiting groove 431 away from the light receiving unit 4. The first limiting groove 431 can limit the second collimating lens 42, which can not only ensure that the second collimating lens 42 can be installed in place, but also block the movement of the second collimating lens 42, thereby preventing the second collimating lens 42 from being misplaced or falling into the inside of the base 1.

[0051] In this embodiment, if Figure 1 , Figure 3 , Figure 6As shown, the limiting kit 43 is provided with two support columns 432 , and the two support columns 432 are respectively provided on both sides of the limiting kit 43 along the radial direction of the limiting kit 43 .

[0052] The support column 432 is located on the side of the limit kit 43 away from the optical receiving module 41. If the limit kit 43 is misaligned or tilted, the second collimating lens 42 may be offset, affecting the conversion of the optical signal. Therefore, the support column 432 is provided to make the limit kit 43 more closely fit the embedded surface of the second through hole 12, avoid tilting or misalignment, and ensure that the limit kit 43 is installed in place. When the second collimating lens 42 is installed in the limit kit 43, the second collimating lens 42 and the optical receiving module 41 can be aligned.

[0053] Here, it should be noted that the limiting kit 43 and the support column 432 can be an integrally formed structure, which simplifies the process flow and makes the connection between the support column 432 and the limiting kit 43 more reliable. Of course, the limiting kit 43 can also be welded with the support column 432, manufactured separately, and assembled later, which depends on the actual situation.

[0054] In this embodiment, if Figure 3 , Figure 5 , Figure 6 As shown, the light receiving unit 4 further includes a first filter 44 disposed in the first through hole 11 and a second filter 45 disposed in the second through hole 12 .

[0055] The first filter 44 is located at the intersection of the axis of the second through hole 12 and the axis of the first through hole 11, and there is a first preset angle between the first filter 44 and the axis of the first through hole 11. The first preset angle is, for example, 45°, so that it can reflect the external optical signal received from the adapter 31, change its transmission path, and continue to transmit toward the light receiving module 41, and the first filter 44 can also filter the 1342nm wavelength light in the external optical signal.

[0056] In some examples, in order to ensure the reliability of the installation of the first filter 44, a limiting plate 111 may be further provided on the inner wall of the first through hole 11, and the first filter 44 is provided on the limiting plate 111 by bonding, and the limiting plate 111 is parallel to the first filter 44 to increase the connection area between the limiting plate 111 and the first filter 44 and improve the connection effect. Among them, the limiting plate 111 has a through hole to ensure the normal transmission of the optical signal.

[0057] The second filter 45 is disposed on a side of the stopper kit 43 away from the light receiving module 41 and connected to the stopper kit 43. The second filter 45 can be disposed on the support column 432 of the stopper kit 43 by bonding, for example, to improve the stability of the second filter 45. The stopper kit 43 is affected by its thermal conductivity, and can ensure that the second filter 45 and the second collimating lens 42 are stably bonded to the stopper kit 43.

[0058] The support column 432 can not only ensure that the limit kit 43 fits well with the embedded surface of the second through hole 12, prevent the limit kit 43, the second filter 45 and the second collimating lens 42 from shaking, ensure that the optical signal can be accurately received, but also protect the second filter 45 from being pressed by the embedded surface of the second through hole 12 and cracked.

[0059] There is a second preset angle between the second filter plate 45 and the axis of the first through hole 11 , and the second preset angle is, for example, 0°.

[0060] The external optical signal received from the adapter 31 is reflected by the first filter 44, transmitted along the second through hole 12, transmitted through the second filter 45, and enters the optical receiving module 41. The second filter 45 filters the optical signal again to ensure that the wavelength light received by the optical receiving module 41 is only the wavelength light of 1342nm.

[0061] The second filter 45 is located on one side of the bottom wall of the first limiting groove 431 and covers the opening of the first limiting groove 431. The opening range of the first limiting groove 431 falls within the projection area of ​​the first filter 44 on the limiting kit 43 to ensure that the passing light signal can be filtered.

[0062] In some exemplary embodiments, Figure 1 , Figure 3 , Figure 4 As shown, the optical emitting unit 2 further includes a mounting seat 23, and the optical emitting module 21 is mounted on the base 1 through the mounting seat 23, thereby realizing a detachable connection. The mounting seat 23 is in a tubular shape with openings at both ends to ensure normal transmission of optical signals.

[0063] Exemplarily, the mounting base 23 includes a collar 231 and a protruding tube 232 . The protruding tube 232 is connected to the base 1 through the collar 231 , and the light emitting module 21 is mounted on the protruding tube 232 .

[0064] One end of the collar 231 is tightly welded to the base 1 , and the other end of the collar 231 is sleeved on one end of the convex tube 232 , and the other end of the convex tube 232 is coupled to the light emitting module 21 .

[0065] The mounting base 23 is detachable, and a new collar 231 can be replaced on a new base 1 . The protruding tube 232 and the optical emission module 21 can be reused, thus realizing resource recycling and saving costs.

[0066] The optical transmission module 21 is coupled to the base 1 through the mounting base 23, which fixes the transmission distance of the optical signal from the optical transmission module 21 to the first filter 44 and determines the strongest convergence point of the optical signal, thereby achieving the optimal optical signal intensity, which plays an auxiliary role in strengthening the optical signal of the optical transmission module 21.

[0067] In this embodiment, if Figure 3 As shown, the light emitting unit 2 includes an isolator 24 connected to the third collimating lens 22. The isolator 24 can be connected to the third collimating lens 22 by bonding, for example, to improve stability.

[0068] Among them, the isolator 24 is located on the side of the third collimating lens 22 away from the pigtail unit 3. The isolator 24 limits the direction of the optical signal so that the optical signal can only be transmitted in one direction. The optical signal located on the side of the isolator 24 close to the pigtail unit 3 can be well isolated by it, thereby improving the transmission efficiency of the optical signal.

[0069] In this embodiment, if Figure 3 As shown, the adapter 31 includes a fiber optic ferrule 311 and a housing 312, the housing 312 is provided with a second limiting groove 3121, the fiber optic ferrule 311 is embedded in the second limiting groove 3121, and the first collimating lens 32 can be connected to the fiber optic ferrule 311 by bonding. The fiber optic ferrule 311 is, for example, a fiber optic ceramic ferrule, which has good thermal stability and corrosion resistance, low loss, and can improve the transmission capacity of the adapter 31, and improve the reliability and transmission rate of the adapter 31.

[0070] At least a portion of the structure of the first collimating lens 32 is located in the second limiting groove 3121 to limit the first collimating lens 32 .

[0071] The housing 312 can be connected to the base 1 by welding, so that the connection is more reliable. An optical fiber connection port 3122 is provided at one end of the housing 312 away from the first collimating lens 32 to receive an external optical signal.

[0072] The optical component proposed in this application can be applied to 50G PON projects, optimizes the internal structure, solves the problem of precise separation of short-distance wavelength light, and effectively reduces product performance loss.

[0073] The present application is constructed by adopting multi-wavelength superposition technology and channel bonding technology, and utilizes a first collimating lens, a second collimating lens, a third collimating lens, a first filter, and a second filter to ensure the correct transmission of the optical link, while preventing the transmission of the optical signal in the combined wave channel from being affected by external factors, reducing the internal loss of the optical component, ensuring the quality of the 50G PON product, and realizing the smooth upgrade and evolution from 10G PON to 50G PON.

[0074] The first collimating lens, the second collimating lens and the third collimating lens can ensure that the external optical signal and the divergent light emitted by the optical transmitting module are converted into parallel light and transmitted smoothly in the multiplexing channel to reduce the wavelength light loss caused by incomplete separation due to the close distance between the wavelength bands.

[0075] The optical transmitter module is coupled to the base through a mounting base, and the distance between the optical transmitter module and the multiplexing channel is fixed, which can ensure that the optical component maintains the strongest optical signal intensity.

[0076] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0077] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0078] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An optical component, characterized in that: include: A base having a first through hole and a second through hole, wherein the axial direction of the first through hole and the axial direction of the second through hole are perpendicular to each other; A pigtail unit is arranged on a first side of the first through hole; the pigtail unit comprises an adapter and a first collimating lens, the adapter is connected to the first collimating lens, and the adapter is used to receive an external optical signal and transmit it through the first collimating lens; a light receiving unit, disposed in the second through hole; wherein the light receiving unit includes a light receiving module and a second collimating lens, and the external light signal transmitted through the first collimating lens can be transmitted to the light receiving module through the second collimating lens; and A light emitting unit is disposed on the second side of the first through hole; wherein the light emitting unit comprises a light emitting module and a third collimating lens, and the optical signal emitted by the light emitting module is transmitted to the pigtail unit via the third collimating lens; Wherein, the light receiving unit includes a limiting kit, and the second collimating lens is installed in the second through hole through the limiting kit; The limiting kit is provided with a first limiting groove, the first limiting groove runs through the limiting kit, and at least a part of the structure of the second collimating lens is arranged in the first limiting groove; Wherein, an inner diameter dimension of a side of the first limiting groove close to the light receiving module is greater than an inner diameter dimension of a side of the first limiting groove away from the light receiving module.

2. The optical component according to claim 1, characterized in that The limiting kit is provided with two support columns, and the two support columns are arranged along the radial direction of the limiting kit; Wherein, the supporting column is located on a side of the limiting kit away from the optical receiving module.

3. The optical component according to claim 1, characterized in that The limiting kit is made of metal material.

4. The optical component according to claim 1, characterized in that The light receiving unit further includes a first filter disposed at the first through hole and a second filter disposed at the second through hole; The first filter is located at the intersection of the axis of the second through hole and the axis of the first through hole, and a first preset angle is formed between the first filter and the axis of the first through hole; The second filter is connected to the limiting kit, and a second preset angle is formed between the second filter and the axis of the first through hole; The external optical signal received from the adapter is reflected by the first filter, transmitted along the second through hole, transmitted through the second filter, and enters the optical receiving module.

5. The optical component according to claim 4, characterized in that The first preset angle is 45°, and the second preset angle is 0°.

6. The optical component according to claim 1, characterized in that The light emitting unit further comprises a mounting seat, and the light emitting module is mounted on the base via the mounting seat; Wherein, the mounting seat comprises a collar and a convex tube, the convex tube is connected to the base through the collar, and the light emitting module is mounted on the convex tube.

7. The optical component according to claim 1, characterized in that The light emitting unit includes an isolator connected to the third collimating lens, and the isolator is located at a side of the third collimating lens away from the pigtail unit.

8. The optical component according to claim 1, characterized in that The adapter includes an optical fiber ferrule and a housing; The housing is provided with a second limiting groove, the optical fiber ferrule is embedded in the second limiting groove, the first collimating lens is connected to the optical fiber ferrule, and at least a part of the structure of the first collimating lens is located in the second limiting groove; The shell is connected to the base, and an optical fiber connection port is arranged at one end of the shell away from the first collimating lens.

9. The optical component according to claim 1, characterized in that: The wavelength of the optical signal received by the optical receiving module is 1342 nm.

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