Light emitting assembly, light receiving assembly and light emitting and receiving assembly

Abstract

The invention provides a light emitting assembly, a light receiving assembly and a light emitting and receiving assembly, and relates to the technical field of optical communication. A light emitting assembly includes: a circuit board; the multimode laser is electrically connected with the circuit board; the collimating lens is arranged above a light outlet of the multi-mode laser and is used for collimating an optical signal emitted by the multi-mode laser; the reflecting mirror is arranged above the collimating lens and is used for converting the transmission direction of the collimated optical signal; the focusing part is arranged on the reflecting side of the reflecting mirror and is used for focusing the optical signal after the transmission direction is converted; the receiving end of the hollow-core optical fiber receives the focused optical signal and transmits the optical signal through the fiber core of the hollow-core optical fiber; and the packaging layer covers the surface of the circuit board and wraps the multimode laser, the collimating lens, the reflecting mirror, the focusing part and the receiving end of the hollow-core optical fiber. The coupling loss of the hollow-core optical fiber can be reduced through the light emitting assembly.

Description

Technical Field

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

[0002] With the development of network technology, the data transmission rate between network devices is getting higher and higher. Traditional electrical signal transmission has encountered bottlenecks, and the application of optical signal transmission is becoming more and more extensive. As the carrier of optical signal transmission, optical fiber has gradually developed hollow-core optical fiber with lower latency.

[0003] For the application of hollow-core optical fiber, the mode field diameter of the laser at the transmitting end needs to have a certain correspondence with the mode field that the hollow-core optical fiber can support. When a multi-mode laser is selected, if a hollow-core optical fiber that can be coupled with an ordinary single-mode optical fiber is selected, it will cause a higher optical power loss. Therefore, how to reduce the transmission loss of hollow-core optical fiber is an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0004] In order to overcome the problems existing in the related art, this specification provides a light emitting component, a light receiving component and a light emitting receiving component.

[0005] According to a first aspect of an embodiment of this specification, there is provided a light emitting assembly, comprising:

[0006] Circuit boards;

[0007] A multi-mode laser, electrically connected to the circuit board;

[0008] A collimating lens, disposed above the light outlet of the multi-mode laser, for collimating the optical signal emitted by the multi-mode laser;

[0009] A reflector, disposed above the collimating lens, converts the transmission direction of the collimated optical signal;

[0010] A focusing unit, arranged on the reflecting side of the reflecting mirror, focuses the optical signal after the transmission direction is converted;

[0011] A hollow core optical fiber, wherein a receiving end of the hollow core optical fiber receives a focused optical signal and transmits the optical signal through a core of the hollow core optical fiber;

[0012] The packaging layer covers the surface of the circuit board and encapsulates the multi-mode laser, the collimating lens, the reflector, the focusing part and the receiving end of the hollow-core optical fiber.

[0013] Optionally, the focusing portion is a focusing lens, which is disposed between the reflector and the receiving end of the hollow-core optical fiber and is used to focus the optical signal on the core of the hollow-core optical fiber.

[0014] Optionally, the focusing portion is formed at the receiving end of the hollow-core optical fiber;

[0015] The receiving end further comprises a sealing portion, which is arranged on a side opposite to the focusing portion and is used to seal the transmission portion of the hollow core optical fiber;

[0016] The focusing part is used to focus the received optical signal on the core of the hollow-core optical fiber.

[0017] Optionally, the focusing portion is configured as a convex lens.

[0018] Optionally, the focusing portion is configured to have a refractive index that gradually increases from the outer side to the center.

[0019] Optionally, the transmission part of the hollow core optical fiber includes:

[0020] outer cladding;

[0021] A sleeve is arranged along the inner wall of the outer cladding;

[0022] A fiber core, formed by surrounding the sleeve;

[0023] Wherein, the thickness of the outer cladding is greater than 20 microns, and the diameter of the fiber core is greater than 25 microns and less than 50 microns.

[0024] Optionally, the sleeve also includes at least one nested tube.

[0025] According to a second aspect of an embodiment of this specification, there is provided a light receiving component, including:

[0026] A hollow core optical fiber, the core of which transmits the optical signal and emits the optical signal through a transmitting end of the hollow core optical fiber;

[0027] Circuit boards;

[0028] A photodiode electrically connected to the circuit board;

[0029] A collimator, disposed on the light-emitting side of the hollow-core optical fiber, to collimate the emitted optical signal;

[0030] A reflector, disposed above the photodiode, for converting the transmission direction of the collimated optical signal;

[0031] A focusing lens is disposed between the photodiode and the reflector, and is used to focus the optical signal after the transmission direction is converted at the light entrance of the photodiode;

[0032] The packaging layer covers the surface of the circuit board and wraps the photodiode, the collimating lens, the reflector, the collimating part and the transmitting end of the hollow-core optical fiber.

[0033] Optionally, the collimating portion is a collimating lens, which is disposed between the reflector and the transmitting end of the hollow-core optical fiber and is used to collimate the optical signal emitted by the hollow-core optical fiber.

[0034] Optionally, the collimating portion is formed at the transmitting end of the hollow core optical fiber;

[0035] The transmitting end further comprises a sealing portion, which is arranged on the opposite side of the collimating portion and seals the transmission portion of the hollow core optical fiber;

[0036] The collimating part is used to collimate the optical signal emitted by the transmission part of the hollow core optical fiber.

[0037] Optionally, the collimating portion is configured as a convex lens.

[0038] Optionally, the collimating portion is configured to have a refractive index that gradually increases from the outside to the center.

[0039] Optionally, the transmission part of the hollow core optical fiber includes:

[0040] outer cladding;

[0041] A sleeve is arranged along the inner wall of the outer cladding;

[0042] A fiber core, formed by surrounding the sleeve;

[0043] Wherein, the thickness of the outer cladding is greater than 20 microns, and the diameter of the fiber core is greater than 25 microns and less than 50 microns.

[0044] Optionally, the sleeve also includes at least one nested tube.

[0045] According to a third aspect of the embodiments of this specification, there is provided an optical transmitting and receiving component, comprising the optical transmitting component described in any one of the above items and the optical receiving component described in any one of the above items.

[0046] The technical solutions provided by the embodiments of this specification may have the following beneficial effects:

[0047] In the embodiments of the present specification, in the optical transmitting component, the optical receiving component and the optical transmitting and receiving component, coupling is performed through the hollow-core optical fiber and the transmitting device or the receiving device arranged on the circuit board, and the hollow-core optical fiber, the transmitting device and the circuit board or the hollow-core optical fiber, the receiving device and the circuit board are securely and hermetically packaged, so that the multi-mode optical signal emitted by the transmitting device of the optical transmitting component can be efficiently received by the hollow-core optical fiber and transmitted along the hollow-core optical fiber to be received by the receiving device of the optical receiving component, thereby reducing the coupling loss of the hollow-core optical fiber.

[0048] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

[0050] Figure 1 It is a structural schematic diagram of an optical transmission component involved in an embodiment of the present application, wherein a focusing portion with a gradient refractive index is formed at the receiving end of the hollow-core optical fiber;

[0051] Figure 2 is a schematic structural diagram of a light emitting assembly involved in an embodiment of the present application, wherein the focusing portion is independently provided;

[0052] Figure 3 is a schematic structural diagram of an optical transmission component involved in an embodiment of the present application, wherein a focusing portion of a convex lens is formed at the receiving end of the hollow-core optical fiber;

[0053] Figure 4 It is a schematic diagram of the structure of a hollow core optical fiber in an optical transmission component involved in an embodiment of the present application;

[0054] Figure 5 It is a schematic diagram of the structure of a hollow core optical fiber in an optical transmission assembly involved in an embodiment of the present application, wherein a nested tube is provided in the hollow core optical fiber;

[0055] Figure 6 It is a structural schematic diagram of an optical receiving component involved in an embodiment of the present application, wherein a collimating portion with a gradually changing refractive index is formed at the transmitting end of the hollow-core optical fiber;

[0056] Figure 7 is a schematic structural diagram of a light receiving assembly involved in an embodiment of the present application, wherein the collimating portion is independently provided;

[0057] Figure 8 is a schematic structural diagram of an optical receiving assembly involved in an embodiment of the present application, wherein a collimating portion of a convex lens is formed at the transmitting end of the hollow-core optical fiber;

[0058] Fig. 9 It is a schematic diagram of the structure of a hollow core optical fiber in an optical receiving component involved in an embodiment of the present application;

[0059] Fig.10 It is a schematic diagram of the structure of a hollow-core optical fiber in a receiving and transmitting assembly involved in an embodiment of the present application, wherein a nested tube is provided in the hollow-core optical fiber. DETAILED DESCRIPTION

[0060] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this specification. Instead, they are merely examples of devices and methods consistent with some aspects of this specification as detailed in the appended claims.

[0061] The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this specification. The singular forms "a", "the" and "the" used in this specification and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0062] It should be understood that although the terms first, second, third, etc. may be used in this specification to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this specification, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0063] In the optical signal transmission system, it includes TOSA (Transmitting Optical Sub-Assembly, optical transmitting assembly), ROSA (Receiving Optical Sub-Assembly, optical receiving assembly) or BOSA (Bi-Directional Optical Sub-Assembly, optical transmitting and receiving assembly) which has the functions of optical signal transmission and optical signal reception respectively. Among them, BOSA can be understood as including the functions of TOSA and ROSA respectively, that is, including various devices for realizing optical signal generation, transmission and reception, but in form it is not necessarily a combination of various devices in TOSA and ROSA.

[0064] The present application provides a light emitting assembly 100, such as Figure 1 As shown, including:

[0065] Circuit board 10;

[0066] The multi-mode laser 20 is electrically connected to the circuit board 10. The optical signal emitted by the multi-mode laser 20 is a divergent scattered light, which is called a first optical signal 30.

[0067] A collimating lens 40 is disposed above the light outlet 20A of the multi-mode laser 20 and is used to collimate the optical signal emitted by the multi-mode laser 20. The collimation function is to convert the first optical signal 30 emitted by the multi-mode laser 20 into a parallel optical signal, which can be called a second optical signal 31;

[0068] A reflector 50 is disposed above the collimating lens 40 to convert the transmission direction of the collimated optical signal. The optical signal after the transmission direction conversion can be referred to as a third optical signal 32.

[0069] The focusing unit 60 is disposed on the reflection side 50A of the reflector 50 and focuses the optical signal after the transmission direction is converted. The focused optical signal can be referred to as the fourth optical signal 33.

[0070] Hollow-core optical fiber 70, the receiving end 70A of the hollow-core optical fiber 60 receives the focused optical signal, and transmits the optical signal through the core 70B of the hollow-core optical fiber 70, that is, the optical signal is transmitted to the outside through the core 70B. Since the fourth optical signal 33 is formed by focusing, the formed light spot is small and can not only be used by multi-mode optical fiber, but also correspond to the core of single-mode hollow-core optical fiber, thereby reducing the coupling loss of the hollow-core optical fiber receiving the optical signal and transmitting it;

[0071] The packaging layer 80 covers the surface of the circuit board 10 and wraps the multimode laser 20, the collimating lens 40, the reflector 50, the focusing unit 60 and the receiving end 70A of the hollow-core optical fiber 70. The packaging layer 80 can be implemented by COB (Chips on Board) packaging and SMD (Surface Mounted Devices) packaging, etc., and can be set according to actual needs, without limitation. In addition, the packaging layer 80 can also encapsulate part of the structure of the hollow-core optical fiber 70 except the receiving end 70A.

[0072] It should be noted that the collimating lens 40, the reflector 50 and the independently arranged focusing unit 60 need to be fixed by a bracket (not shown), and the multi-mode laser 20 can be electrically connected to the circuit board 10 through a connecting line (not shown). After the structure on the circuit board 10 is formed and various lenses are fixed by the bracket, they are packaged by the packaging layer 80, thereby achieving the stability of the optical transmission component 100.

[0073] Since a multimode laser 20 is used in the optical transmission component 100, the emitted light is scattered light, and direct transmission through the single-mode hollow-core optical fiber 70 will cause greater losses. Therefore, when processing the optical signal emitted by the multimode laser 20, it is necessary to focus it to adapt to the single-mode hollow-core optical fiber with a smaller core, thereby reducing the transmission loss of the optical signal in the hollow-core optical fiber.

[0074] Optional, such as Figure 2 As shown, the focusing portion 60 is a focusing lens, which is disposed between the reflector 50 and the receiving end 70A of the hollow-core optical fiber 70 , and is used to focus the optical signal on the core 70B of the hollow-core optical fiber 70 .

[0075] That is, an independent focusing portion 60 in the form of a focusing lens is provided in the light emitting module 100 .

[0076] Optional, such as Figure 3 As shown, the focusing portion 60 is formed at the receiving end 70A of the hollow core optical fiber;

[0077] The receiving end 70A further includes a sealing portion 70C, which is disposed on the opposite side of the focusing portion 60 and is used to seal the transmission portion 70D of the hollow-core optical fiber 70. The sealing portion 70C is made of glass and is connected to the transmission portion 70D of the hollow-core optical fiber 70 by bonding or hot melting. The transmission portion 70D refers to the portion between the two ends (transmitting end and receiving end) of a hollow-core optical fiber 70. The sealing portion 70C seals the hollow-core optical fiber 70 to prevent dust from entering and interfering with the transmission of the optical signal.

[0078] The focusing unit 60 is used to focus the received optical signal onto the core 70B of the hollow-core optical fiber 70 .

[0079] Optional, such as Figure 3 As shown, the focusing portion 60 is configured as a convex lens.

[0080] That is, focusing of the optical signal is achieved on one side of the receiving end 70A by means of a convex lens.

[0081] Optional, such as Figure 1 As shown, the focusing portion 60 is configured such that the refractive index gradually increases from the outer side to the center.

[0082] That is, focusing of the optical signal is achieved on one side of the receiving end 70A by means of a plane mirror, wherein the refractive index of the plane mirror is changed by material doping.

[0083] Specifically, Figure 4 As shown, the transmission portion 70D of the hollow core optical fiber 70 includes:

[0084] Outer cladding 70E;

[0085] The sleeves 70F are arranged along the inner wall of the outer cladding 70E. The number of the sleeves 70F can be set according to actual needs, such as 6, 7, 8 or more. Figure 4 There are 8 sleeves 70E arranged in the middle;

[0086] The fiber core 70B is formed by the sleeve 70F surrounding the fiber core 70B. When surrounding the fiber core 70B, the sleeves 70F may contact each other or have a certain gap between the sleeves 70F. The setting can be based on actual needs without limitation.

[0087] The thickness of the outer cladding 70E is greater than 20 microns, for example, it can be set to 20 microns or 30 microns, etc. The diameter of the fiber core 70B is greater than 25 microns and less than 50 microns, for example, it can be set to 45 microns.

[0088] Optional, such as Figure 5 As shown, the sleeve 70F further includes at least one nested tube 70G.

[0089] Correspondingly, the present application also provides a light receiving component 200, such as Figure 6 As shown, including:

[0090] A hollow core optical fiber 71, wherein the core 7B of the hollow core optical fiber 71 transmits the optical signal, and emits the optical signal through the transmitting end of the hollow core optical fiber, and the emitted optical signal can be referred to as a fifth optical signal 34;

[0091] Circuit board 11;

[0092] A photodiode (PD) 21, electrically connected to the circuit board 11;

[0093] The collimating part 61 is arranged at the light output side of the hollow core optical fiber 70 to collimate the emitted optical signal. The collimating function is to convert the fifth optical signal 34 emitted by the hollow core optical fiber 71 into a parallel optical signal. The collimated optical signal can be referred to as the sixth optical signal 35.

[0094] A reflector 51 is disposed above the photodiode 21 and is used to convert the transmission direction of the collimated optical signal. The optical signal after the transmission direction is converted can be referred to as a seventh optical signal 36.

[0095] A focusing lens 41 is disposed between the photodiode 21 and the reflector 51, and is used to focus the optical signal after the transmission direction is converted at the light entrance 21A of the photodiode 21. The focused optical signal can be referred to as an eighth optical signal 37;

[0096] The packaging layer 81 covers the surface of the circuit board 11 and wraps the photodiode 21, the collimating lens 41, the reflector 51, the collimating portion 61 and the transmitting end 71A of the hollow-core optical fiber 71. The packaging layer 81 can be implemented by COB (Chips on Board) packaging and SMD (Surface Mounted Devices) packaging, etc., and can be set according to actual needs, without limitation. In addition, the packaging layer 81 can also encapsulate part of the structure of the hollow-core optical fiber 71 except the transmitting end 71A.

[0097] It should be noted that the focusing lens 41, the reflector 51 and the independently arranged collimating part 61 need to be fixed by a bracket (not shown), and the photodiode 21 can be electrically connected to the circuit board 11 through a connecting wire (not shown). After the structure on the circuit board 11 is formed and various lenses are fixed by the bracket, they are packaged by the packaging layer 81, thereby achieving the stability of the light emitting component 200.

[0098] Corresponding to the optical transmitting component 100, the optical receiving component 200 realizes collimation of the outgoing light through the collimating part 61, and then converts the transmission direction to point to the circuit board 11 through the reflector 51, and focuses the optical signal onto the photodiode 21 through the focusing lens 41 to realize the reception of the optical signal.

[0099] Optional, such as Figure 7 As shown, the collimating portion 61 is a collimating lens, which is disposed between the reflector 51 and the transmitting end 71A of the hollow-core optical fiber 71 , and is used to collimate the optical signal emitted by the hollow-core optical fiber 71 .

[0100] That is, an independent collimating portion 61 in the form of a collimating lens is provided in the light receiving module 200 .

[0101] Optional, such as Figure 6 As shown, the collimating portion 61 is formed at the transmitting end 71A of the hollow core optical fiber 71;

[0102] The transmitting end 71A further includes a sealing portion 71C, which is disposed on the opposite side of the collimating portion 61 and seals the transmission portion 71D of the hollow-core optical fiber 71. The sealing portion 71C is made of glass and is connected to the transmission portion 71D of the hollow-core optical fiber 71 by bonding or hot melting. The transmission portion 71D refers to the portion between the two ends (transmitting end and receiving end) of a hollow-core optical fiber 71. The sealing portion 71C seals the hollow-core optical fiber 71 to prevent dust from entering and interfering with the transmission of optical signals.

[0103] The collimating portion 61 is used to collimate the optical signal emitted from the transmission portion 71C of the hollow core optical fiber 71 .

[0104] Optional, such as Figure 8 As shown, the collimating portion 61 is configured as a convex lens.

[0105] That is, the focusing of the optical signal is achieved on one side of the transmitting end 71A by means of a convex lens.

[0106] Optional, such as Figure 6 As shown, the collimating portion 61 is configured such that the refractive index gradually increases from the outer side to the center.

[0107] That is, the focusing of the optical signal is achieved on one side of the transmitting end 71A by means of a plane mirror, wherein the refractive index of the plane mirror is changed by material doping.

[0108] Specifically, Fig. 9 As shown, the transmission portion 71D of the hollow core optical fiber 71 includes:

[0109] Outer cladding 71E;

[0110] The sleeves 71F are arranged along the inner wall of the outer cladding layer 71E. The number of the sleeves 71F can be set according to actual needs, such as 6, 7, 8 or more. Figure 8 There are 8 sleeves 71E arranged in the middle;

[0111] The fiber core 70B is formed by the sleeve 71F surrounding the fiber core 70B. When surrounding the fiber core 70B, the sleeves 71F may contact each other or have a certain gap between the sleeves 71F. The setting can be based on actual needs without limitation.

[0112] The thickness of the outer cladding 71E is greater than 20 microns, for example, it can be set to 20 microns or 30 microns, etc. The diameter of the fiber core 71B is greater than 25 microns and less than 50 microns, for example, it can be set to 45 microns.

[0113] Optional, such as Fig.10 As shown, the sleeve 71F also includes at least one nested tube 71G.

[0114] Correspondingly, the present application also provides an optical transmitting and receiving component, comprising the optical transmitting component described in any one of the above items and the optical receiving component described in any one of the above items.

[0115] The technical solutions provided by the embodiments of this specification may have the following beneficial effects:

[0116] In the embodiments of the present specification, in the optical transmitting component, the optical receiving component and the optical transmitting and receiving component, coupling is performed through the hollow-core optical fiber and the transmitting device or the receiving device arranged on the circuit board, and the hollow-core optical fiber, the transmitting device and the circuit board or the hollow-core optical fiber, the receiving device and the circuit board are firmly packaged, so that the multi-mode optical signal emitted by the transmitting device of the optical transmitting component can be efficiently received by the hollow-core optical fiber, and transmitted along the hollow-core optical fiber to the receiving device of the optical receiving component for reception, thereby isolating the influence of water vapor in the air on the performance of the hollow-core optical fiber and the laser, and reducing the coupling loss of the hollow-core optical fiber.

[0117] The implementation process of the functions and effects of each module in the above-mentioned device is specifically described in the implementation process of the corresponding steps in the above-mentioned method, which will not be repeated here.

[0118] For the device embodiment, since it basically corresponds to the method embodiment, the relevant parts can refer to the partial description of the method embodiment. The device embodiment described above is only schematic, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this specification. A person of ordinary skill in the art can understand and implement it without paying creative labor.

[0119] Those skilled in the art will readily appreciate other embodiments of the specification after considering the specification and practicing the invention claimed herein. The specification is intended to cover any variations, uses or adaptations of the specification that follow the general principles of the specification and include common knowledge or customary techniques in the art that are not claimed in the specification. The specification and examples are to be considered exemplary only, and the true scope and spirit of the specification are indicated by the following claims.

[0120] It should be understood that the present description is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present description is limited only by the appended claims.

[0121] The above description is only a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this specification should be included in the scope of protection of this specification.

Claims

1. A light emitting component, characterized in that: include: Circuit boards; A multi-mode laser, electrically connected to the circuit board; A collimating lens, disposed above the light outlet of the multi-mode laser, for collimating the optical signal emitted by the multi-mode laser; A reflector, disposed above the collimating lens, converts the transmission direction of the collimated optical signal; A focusing unit, arranged on the reflecting side of the reflecting mirror, focuses the optical signal after the transmission direction is converted; A hollow-core optical fiber, wherein a receiving end of the hollow-core optical fiber receives a focused optical signal and transmits the optical signal through a core of the hollow-core optical fiber; The packaging layer covers the surface of the circuit board and wraps the multi-mode laser, the collimating lens, the reflector, the focusing part and the receiving end of the hollow-core optical fiber.

2. The light emitting assembly according to claim 1, characterized in that: The focusing part is a focusing lens, which is arranged between the reflector and the receiving end of the hollow-core optical fiber and is used to focus the optical signal on the core of the hollow-core optical fiber.

3. The light emitting assembly according to claim 1, characterized in that: The focusing portion is formed at the receiving end of the hollow core optical fiber; The receiving end further comprises a sealing portion, which is arranged on a side opposite to the focusing portion and is used to seal the transmission portion of the hollow core optical fiber; The focusing part is used to focus the received optical signal on the core of the hollow-core optical fiber.

4. The light emitting assembly according to claim 3, characterized in that: The focusing portion is configured as a convex lens.

5. The light emitting assembly according to claim 3, characterized in that: The focusing portion is configured such that the refractive index gradually increases from the outer side to the center.

6. The light emitting assembly according to claim 1, characterized in that: The transmission part of the hollow core optical fiber comprises: outer cladding; A sleeve is arranged along the inner wall of the outer cladding; A fiber core, formed by surrounding the sleeve; Wherein, the thickness of the outer cladding is greater than 20 microns, and the diameter of the fiber core is greater than 25 microns and less than 50 microns.

7. The light emitting assembly according to claim 6, characterized in that: The sleeve also includes at least one nested tube.

8. A light receiving component, characterized in that: include: A hollow core optical fiber, the core of which transmits an optical signal and the optical signal is emitted through a transmitting end of the hollow core optical fiber; Circuit boards; A photodiode electrically connected to the circuit board; A collimator, disposed on the light-emitting side of the hollow-core optical fiber, to collimate the emitted optical signal; A reflector, disposed above the photodiode, for converting the transmission direction of the collimated optical signal; A focusing lens is disposed between the photodiode and the reflector, and is used to focus the optical signal after the transmission direction is converted at the light entrance of the photodiode; The packaging layer covers the surface of the circuit board and wraps the photodiode, the collimating lens, the reflector, the collimating part and the transmitting end of the hollow-core optical fiber.

9. The light receiving assembly according to claim 8, characterized in that: The collimating part is a collimating lens, which is arranged between the reflector and the transmitting end of the hollow-core optical fiber and is used to collimate the optical signal emitted by the hollow-core optical fiber.

10. The light receiving assembly according to claim 8, characterized in that: The collimating portion is formed at the transmitting end of the hollow core optical fiber; The transmitting end further comprises a sealing portion, which is arranged on the opposite side of the collimating portion and seals the transmission portion of the hollow core optical fiber; The collimating part is used to collimate the optical signal emitted by the transmission part of the hollow core optical fiber.

11. The light receiving assembly according to claim 10, characterized in that: The collimating portion is configured as a convex lens.

12. The light receiving assembly according to claim 10, characterized in that: The collimating portion is configured such that the refractive index gradually increases from the outer side to the center.

13. The light receiving assembly according to claim 8, characterized in that: The transmission part of the hollow core optical fiber comprises: outer cladding; A sleeve is arranged along the inner wall of the outer cladding; A fiber core, formed by surrounding the sleeve; Wherein, the thickness of the outer cladding is greater than 20 microns, and the diameter of the fiber core is greater than 25 microns and less than 50 microns.

14. The light receiving assembly according to claim 13, characterized in that: The sleeve also includes at least one nested tube.

15. An optical transmitting and receiving component, characterized in that: It comprises the optical transmitting component described in any one of claims 1 to 7 and the optical receiving component described in any one of claims 8 to 14.

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