Polarization maintaining optical fiber array for low-insertion-loss optical fiber laser source

Abstract

The utility model provides a polarization maintaining optical fiber array for a low-insertion-loss optical fiber laser source, which relates to the technical field of optical fiber lasers and comprises a laser main body and a control mainboard, a transmission groove is arranged on the front side of the laser, transmission interfaces are circumferentially distributed in the transmission groove, and dustproof rubber sleeves are sleeved outside the transmission interfaces. The end of the dustproof rubber sleeve abuts against the edge of the transmission groove, a limiting groove is formed in the outer portion of the dustproof rubber sleeve, an elastic bunching belt is clamped in the limiting groove, the multiple sets of optical fiber body arrays are distributed and installed along the circumference of the transmission interface, and the ends of the optical fiber bodies are covered and positioned through the dustproof rubber sleeve. Meanwhile, the elastic bunching belt on the surface of the dustproof rubber sleeve is used for bunching on the surface of the optical fiber main body, so that the end part of the optical fiber main body is positioned and bunched, the end part of the optical fiber main body is effectively prevented from being bent and scattered when the surfaces of a plurality of optical fiber main bodies are connected, the access stability of the optical fiber main body is improved, shaking is prevented, and loss is reduced; and the surface of the optical fiber main body can be protected and positioned conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber lasers, in particular to a polarization-maintaining optical fiber array for a low-insertion-loss optical fiber laser source. Background Art

[0002] According to a multi-channel array fiber laser disclosed in China Publication No. CN204947313U, it includes a housing and a core insert, wherein multiple groups of laser components are arranged side by side in the housing, wherein each group of laser components is connected to an array fiber module with multiple groups of thermal expansion optical fibers through an optical isolator, wherein multiple optical fibers output by the array fiber module are collected in the core insert, wherein the multiple groups of laser components are arranged on the same module board, wherein the front end of the laser chip in each group of laser components emits laser light and irradiates the laser isolator through a convex lens, and then input into the thermal expansion optical fiber. With the above structure, the coupling efficiency is relatively high, and laser array coupling can be realized.

[0003] The above patent documents and prior art have the following technical problems:

[0004] 1. The surface interface of the fiber laser generally adopts a straight-line flat structure, which results in the dispersion of multiple groups of optical fibers when connected, and the lack of a line arrangement structure causes the inserted optical fiber lines to be scattered and difficult to arrange;

[0005] 2. The structure of the fiber laser surface is exposed when the optical fiber is not connected, which makes the surface easily contaminated by dust or the interface surface is directly damaged when the laser falls. The protection of the interface is insufficient, which makes the inside and outside of the interface easy to be damaged, affecting the transmission rate. Utility Model Content

[0006] The utility model aims to solve the shortcomings of the prior art that the scattered interfaces on the surface of the laser lead to the disorder of the optical fiber lines and the insufficient protection of the interfaces, and proposes a polarization-maintaining optical fiber array for a low insertion loss optical fiber laser source.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a polarization-maintaining fiber array for a low-insertion-loss fiber laser source, comprising a laser body and a control mainboard, a transmission groove is provided on the front of the laser, transmission interfaces are distributed circumferentially inside the transmission groove, a dust-proof rubber sleeve is sleeved on the outside of the transmission interface, and the end of the dust-proof rubber sleeve is abutted against the edge of the transmission groove, a limiting groove is provided on the outside of the dust-proof rubber sleeve, an elastic cable tie is engaged inside the limiting groove, and the surface of the transmission interface is connected to the optical fiber body.

[0008] Preferably, the front side of the laser body is provided with transmission grooves evenly distributed in a linear array, and the transmission grooves correspond to the transmission interfaces one by one, and the back side of the laser body is provided with connection lines.

[0009] Preferably, a control mainboard is provided inside the laser body, connection interfaces are provided on both sides of the control mainboard, and the connection interfaces are located on both sides of the laser body.

[0010] Preferably, a transmission contact is provided inside the transmission slot, and the transmission contact is electrically connected to the control mainboard, and an end of the transmission contact is electrically connected to an end of the transmission interface.

[0011] Preferably, a heat dissipation window is provided on the top surface of the laser body, and mounting ears are provided on both side edges of the back surface of the laser body.

[0012] Preferably, a circumference of a surface of one end of the transmission interface close to the transmission groove is provided with positioning teeth, and the positioning teeth on adjacent surfaces of the transmission interface engage with each other.

[0013] Preferably, the edges of the surface of the laser body are all rounded, and the end of the dustproof rubber sleeve away from the limiting groove is tapered.

[0014] Beneficial Effects

[0015] In the utility model, the front side of the laser body is connected to the circumferentially distributed transmission interface through a transmission groove to access the optical fiber body, so that multiple groups of optical fiber body arrays are installed along the circumferential distribution of the transmission interface, and the ends of the optical fiber bodies are covered and positioned by a dustproof rubber sleeve. At the same time, the surface of the optical fiber body is bundled by an elastic cable tie on the surface of the dustproof rubber sleeve, so that the end of the optical fiber body after access to the surface of the laser body is positioned and bundled, and the bending of the end of the optical fiber body and the scattering when multiple optical fiber body surfaces are connected are effectively prevented, the stability of the optical fiber body access is increased, shaking is prevented, loss is reduced, and the surface of the optical fiber body is protected and positioned.

[0016] In the utility model, a transmission interface on the surface of the laser body is used to set a circumferentially distributed transmission interface for access to the optical fiber body. When the optical fiber body is not accessed, the end of the transmission interface is covered and dust-proofed by a dust-proof rubber sleeve, thereby effectively avoiding damage to the transmission interface. At the same time, the protruding structure of the dust-proof rubber sleeve can buffer and protect the transmission data when the transmission interface on the surface of the laser body is hit or falls, thereby preventing the transmission interface from being directly damaged by collision, reducing the surface force, and realizing dust-proof and anti-collision treatment of the transmission interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0018] Figure 2 It is an axonometric drawing of the utility model;

[0019] Figure 3 This is a diagram of the installation structure of the optical fiber main body of the utility model;

[0020] Figure 4 This is a diagram showing the internal structure of the laser body of the utility model;

[0021] Figure 5 This is a disassembled structural diagram of the transmission trough of the utility model.

[0022] Legend:

[0023] 1. Laser body; 2. Connection line; 3. Mounting ear; 4. Heat dissipation window; 5. Connection interface; 6. Control main board; 7. Transmission slot; 8. Transmission contact; 9. Transmission interface; 10. Dust-proof rubber sleeve; 11. Limiting slot; 12. Elastic cable tie; 13. Optical fiber body; 14. Positioning tooth. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0025] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings. Specific embodiment one:

[0027] Reference Figure 1-5 A polarization-maintaining fiber array for a low-insertion-loss fiber laser source comprises a laser body 1 and a control mainboard 6. A transmission slot 7 is arranged on the front of the laser. A control mainboard 6 is arranged inside the laser body 1. Connection interfaces 5 are arranged on both sides of the control mainboard 6, and the connection interfaces 5 are located on both sides of the laser body 1. Transmission slots 7 are evenly distributed in a linear array on the front of the laser body 1, and the transmission slots 7 correspond to the transmission interfaces 9 one by one. A connection line 2 is arranged on the back of the laser body 1. When the entire laser body 1 is actually used, the line is accessed through the connection interfaces 5 arranged on both sides, the data signal is input through the access line on one side, and the processed data is output through the connection line 2 or the device on the other side, so as to realize signal access and transmission. At the same time, the optical fiber body 13 is accessed through the transmission slot 7 on the front of the laser body 1 to realize the access of the polarization fiber array. Multiple optical fiber bodies 13 can be accessed through the transmission slot 7 for signal processing and transmission.

[0028] When the optical fiber body 13 is not connected, since the transmission slot 7 is provided with transmission interfaces 9 distributed on the circumference, the transmission interface 9 is sleeved with a dustproof rubber sleeve 10 on the outside, and the end of the dustproof rubber sleeve 10 is against the edge of the transmission slot 7, the dustproof rubber sleeve 10 is provided with a limiting groove 11 on the outside, and an elastic cable tie 12 is engaged inside the limiting groove 11, and the surface of the transmission interface 9 is connected with an optical fiber body 13, and the optical fiber body 13 is connected to the transmission interface 9 to achieve access to the laser body 1. In the normal non-entry state, the end of the dustproof rubber sleeve 10 maintains a normal state. Since the dustproof rubber sleeve 10 is away from One end of the limiting groove 11 is tapered, so when the optical fiber body 13 is not connected, the end of the dustproof rubber sleeve 10 maintains a tapered structure to cover the end of the transmission interface 9 connected to the transmission groove 7. The dustproof treatment of the end of the transmission interface 9 is performed by the dustproof rubber sleeve 10 to effectively avoid damage to the transmission interface 9. At the same time, the protruding structure of the dustproof rubber sleeve 10 can be used to buffer the transmission data when the transmission interface 9 on the surface of the laser body 1 is hit or falls, preventing the transmission interface 9 from being directly damaged by collision, reducing the surface force, and realizing dustproof and anti-collision treatment of the transmission interface 9.

[0029] When the optical fiber body 13 is connected to the laser, firstly, the end of the dustproof rubber sleeve 10 corresponding to the surface of the transmission groove 7 is folded from the inside to the outside to expose the end of the transmission interface 9, and then the optical fiber body 13 is inserted into the transmission interface 9. After connection, the dustproof rubber sleeve 10 is flipped to restore the initial position. Since the diameter of the end of the dustproof rubber sleeve 10 is smaller than the diameter of the transmission groove 7, after the optical fiber body 13 is connected, the inner wall of the dustproof rubber sleeve 10 is against the surface of the optical fiber body 13. At this time, the dustproof rubber sleeve 10 is stretched open, and under the influence of the rebound force, the surface of the optical fiber body 13 is restrained, and an end squeezing force is generated to prevent the optical fiber body 13 from falling off. At the same time, the end of the optical fiber body 13 can be protected from bending and impact. Then the elastic digital display belt on the surface of the dustproof rubber sleeve 10 is taken out from the inside of the limiting groove 11, and slides along the surface of the optical fiber body 13, and is restrained by the surface of the optical fiber body 13 away from the access end, so as to realize the optical fiber body 13. The line arrangement and wiring processing, the elastic cable tie 12 is in an expanded state when it is inside the limiting groove 11, ensuring that the circumference of the optical fiber body 13 is larger than the range of the elastic cable tie 12 in the normal non-expanded state, so that the elastic cable tie 12 taken out from the limiting groove 11 still has resilience when it contacts the surface of the optical fiber body 13, and the wiring on the surface of the optical fiber body 13 is kept stable. According to the distribution position of the transmission interface 9, multiple groups of optical fiber bodies 13 are installed along the circumference of the transmission interface 9, and the ends of the optical fiber bodies 13 are covered and positioned by the dustproof rubber sleeve 10. At the same time, the elastic cable tie 12 on the surface of the dustproof rubber sleeve 10 is used to bundle the surface of the optical fiber body 13, so as to realize the positioning and bundling of the ends of the optical fiber body 13 after the surface of the laser body 1 is connected, effectively prevent the bending of the ends of the optical fiber body 13 and the disorder when the surfaces of multiple optical fiber bodies 13 are connected, and it is convenient to protect and position the surface of the optical fiber body 13

[0030] Other limiting structures of the entire device are as follows: a positioning tooth 14 is provided on the circumference of the surface of one end of the transmission interface 9 close to the transmission slot 7, and the positioning teeth 14 on the surfaces of adjacent transmission interfaces 9 are engaged with each other. The positioning teeth 14 are provided to limit the surfaces of adjacent transmission interfaces 9, so that the surfaces of adjacent transmission interfaces 9 are kept against each other when they are installed in a circle to prevent shaking and increase the stability of the transmission interface 9. A transmission contact 8 is provided inside the transmission slot 7, and the transmission contact 8 is electrically connected to the control main board 6. The end of the transmission contact 8 is electrically connected to the end of the transmission interface 9. The transmission interface 9 is connected to the surface of the control main board 6 through the transmission contact 8 to maintain the normal operation of each transmission interface 9 on the surface of the entire laser body 1. A heat dissipation window 4 is provided on the top surface of the laser body 1, and mounting ears 3 are provided on the edges of both sides of the back of the laser body 1. The edges of the surface of the laser body 1 are all rounded. Specific embodiment 2:

[0032] Reference Figure 1-5 According to the content of the specific embodiment 1, the following contents are further disclosed:

[0033] The optical fiber body 13 used in the present application is a polarization-maintaining optical fiber, which is a specially designed optical fiber. Its main feature is that it can keep the polarization direction of the light wave unchanged. This feature makes the polarization-maintaining optical fiber widely used in the fields of optical communication, laser, optical fiber sensing, etc. The following is a detailed description of the special design structure of the polarization-maintaining optical fiber:

[0034] The basic structure of polarization-maintaining optical fiber is mainly composed of the core and the cladding. Some polarization-maintaining optical fibers also contain polarization-maintaining layers or special stress areas to achieve the polarization-maintaining effect:

[0035] The core area is the core region of optical signal transmission and is usually made of materials with a high refractive index. In order to achieve polarization maintenance of optical signals, the structure of the core area is usually asymmetric, such as an eccentric core structure or a bent core structure. The eccentric core structure means that the geometric shape of the core area is asymmetric in the radial direction, such as offsetting the circular core area to one side of the optical fiber. This structure can control the polarization maintenance performance of the optical signal by changing the shape and size of the core area. The bent core structure means that the core area is arranged in a curved manner in the optical fiber, and the polarization maintenance of the optical signal is achieved by controlling the bending radius and angle of the core area. The bent core structure usually has a higher polarization maintenance performance, but it will also introduce certain transmission losses.

[0036] The cladding is the outer protective layer of the core region, usually made of a material with a lower refractive index. The main function of the cladding is to limit the propagation of optical signals in the core region and reduce the interference of optical signals with the external environment.

[0037] In order to achieve polarization maintenance, the cladding usually has a special structure, such as a polarization protection layer or a refractive index gradient cladding. The polarization protection layer can effectively suppress the non-polarization maintaining component of the optical signal, while the refractive index gradient cladding can achieve polarization maintenance by controlling the propagation path of the optical signal in the cladding.

[0038] The working principle of polarization-maintaining fiber is based on the polarization characteristics of optical signals and the polarization-maintaining property of optical fiber structure. When polarized optical signals enter polarization-maintaining fiber, their polarization state will be maintained under the action of core and cladding. Due to the characteristics of polarization-maintaining fiber such as birefringence effect and asymmetric structure, the two polarization components of optical signals will follow different paths and produce phase difference when propagating in the optical fiber. By adjusting the structure and material parameters of the optical fiber and other conditions, the relative phase difference of the two polarization components can be kept unchanged, thereby maintaining the polarization state of the optical signal unchanged.

[0039] In summary:

[0040] 1. The front of the laser body 1 is connected to the circumferentially distributed transmission interface 9 through the transmission groove 7 to access the optical fiber body 13, so that multiple groups of optical fiber bodies 13 arrays are installed along the circumference of the transmission interface 9, and the ends of the optical fiber bodies 13 are covered and positioned by the dustproof rubber sleeve 10. At the same time, the elastic cable tie 12 on the surface of the dustproof rubber sleeve 10 is used to bundle the surface of the optical fiber body 13, so as to realize the positioning and bundling of the ends of the optical fiber body 13 after the surface of the laser body 1 is connected, effectively prevent the bending of the ends of the optical fiber body 13 and the disorder when the surfaces of multiple optical fiber bodies 13 are connected, and facilitate the protection and positioning of the surface of the optical fiber body 13;

[0041] 2. The transmission interface 9 on the surface of the laser body 1 is set with a circumferentially distributed transmission interface 9 to access the optical fiber body 13. When the optical fiber body 13 is not connected, the end of the transmission interface 9 is covered and dust-proofed by the dust-proof rubber sleeve 10, which effectively avoids damage to the transmission interface 9. At the same time, the protruding structure of the dust-proof rubber sleeve 10 can buffer and protect the transmission data when the transmission interface 9 on the surface of the laser body 1 is hit or falls, preventing the transmission interface 9 from being directly damaged by collision, reducing the surface force, and realizing dust-proof and anti-collision treatment of the transmission interface 9.

[0042] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0043] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A polarization-maintaining fiber array for a low insertion loss fiber laser source, comprising a laser body (1) and a control mainboard (6), characterized in that: The front of the laser is provided with a transmission groove (7), the transmission groove (7) is provided with transmission interfaces (9) distributed in a circumferential manner, the transmission interface (9) is sleeved with a dustproof rubber sleeve (10) on the outside, and the end of the dustproof rubber sleeve (10) is abutted against the edge of the transmission groove (7), the dustproof rubber sleeve (10) is provided with a limit groove (11) on the outside, and an elastic cable tie (12) is engaged with the limit groove (11), the surface of the transmission interface (9) is connected with an optical fiber body (13), the front of the laser body (1) is provided with transmission grooves (7) distributed in a uniform linear array, and the transmission grooves (7) correspond to the transmission interfaces (9) one by one, and the back of the laser body (1) is provided with a connecting line (2).

2. The polarization-maintaining fiber array for a low insertion loss fiber laser source according to claim 1, characterized in that: A control main board (6) is provided inside the laser body (1), connection interfaces (5) are provided on both sides of the control main board (6), and the connection interfaces (5) are located on both sides of the laser body (1).

3. The polarization-maintaining fiber array for a low insertion loss fiber laser source according to claim 1, characterized in that: A transmission contact (8) is provided inside the transmission slot (7), and the transmission contact (8) is electrically connected to the control main board (6), and the end of the transmission contact (8) is electrically connected to the end of the transmission interface (9).

4. The polarization-maintaining fiber array for a low insertion loss fiber laser source according to claim 1, characterized in that: The top surface of the laser body (1) is provided with a heat dissipation window (4), and the edges of both sides of the back surface of the laser body (1) are provided with mounting ears (3).

5. The polarization-maintaining fiber array for a low insertion loss fiber laser source according to claim 1, characterized in that: Positioning teeth (14) are provided on the circumference of one end surface of the transmission interface (9) close to the transmission groove (7), and the positioning teeth (14) on the surfaces of adjacent transmission interfaces (9) are engaged with each other.

6. The polarization-maintaining fiber array for a low insertion loss fiber laser source according to claim 1, characterized in that: The edges of the surface of the laser body (1) are all rounded, and the end of the dustproof rubber sleeve (10) away from the limiting groove (11) is tapered.

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