Semiconductor laser optical fiber inspection system and method

Abstract

The invention relates to a semiconductor laser optical fiber inspection system and method, and belongs to the technical field of photoelectron inspection, the semiconductor laser optical fiber inspection system comprises an inspection table, an optical fiber fixer and a detector, a guide groove bottom plate is arranged on the inspection table, a guide groove is formed in the guide groove bottom plate, a limiting rod penetrates through the guide groove, a driving motor drives the limiting rod to move in the guide groove, and a z column is arranged beside the inspection table. The driving motor drives the pressure plate to move up and down along the z column; when the pressure plate is pressed downwards, the pressure plate can penetrate through the limiting rod to apply pressure to the optical fiber wound on the limiting rod, one end of the optical fiber is connected with the laser, the other end of the optical fiber bypasses the limiting rod to be connected to the optical fiber fixer, optical fiber beams are emitted to the detector from the laser, and the detector records beam parameters. The stress conditions of the optical fibers under different bending radians and different diameters and corresponding light beam parameters can be simulated, the inspection efficiency and applicability are improved, and the test result is closer to the actual application scene.

Description

Technical Field

[0001] The invention relates to a semiconductor laser optical fiber inspection system and method, belonging to the technical field of optoelectronic inspection. Background Art

[0002] Optical fiber is a fiber made of glass or plastic that can be used as a light transmission tool. It uses the principle of total reflection of light to transmit optical signals from one end to the other. As a type of optical device, optical fiber has the advantages of fast transmission speed, large bandwidth, and strong anti-interference ability. It is an indispensable part of modern communication and information technology. In order to ensure the quality of optical fiber, optical fiber is generally tested to detect whether the optical fiber successfully transmits optical signals, detect the degree of bending and the accuracy of transmitted data, and detect the degree of bending and the degree of loss during optical fiber transmission.

[0003] As an important component of semiconductor lasers, the different stress states of optical fiber will directly affect the output quality of the light beam, such as power loss, spot uniformity and other parameter values. The ideal state of semiconductor laser optical fiber is to use it vertically without bending to achieve the best transmission state. However, in actual use, due to the influence of equipment space, the optical fiber will inevitably be coiled and bent, so the optical fiber will receive radial tension, axial tension, and torsional force, which will affect the output beam of the laser. Therefore, it is necessary to test the transmission quality of the optical fiber under different stress states.

[0004] The existing detection method and detection device can only test optical fibers with fixed diameter and single bending arc, which has low applicability and low detection efficiency, and cannot simulate the stress state of optical fibers during actual use.

[0005] Patent document with publication number CN102692315A discloses a device and method for detecting optical fiber microbend loss, which can realize the loss value of the optical fiber when the optical fiber is slightly bent after being subjected to extrusion force.

[0006] Patent document with publication number CN118565764A discloses a device and method for optical fiber testing, which can test the coupling performance of optical fibers when they are bent to different degrees.

[0007] The patent document with publication number CN212871682U discloses an optical fiber bending device, which can test the performance of the optical fiber when the optical fiber is in a bending state of different degrees.

[0008] Patent document with publication number CN219608393U discloses an optical fiber bending test device, which can improve the efficiency of optical fiber bending test.

[0009] Based on the above, the above invention scheme can only test the optical fiber under different bending states, that is, it can only test the radial force of the optical fiber, and cannot simulate the actual state of the optical fiber being subjected to radial force, pressure, axial tension and torque at the same time in actual use. The present invention provides an optical fiber inspection system and method, which can simulate the state of the optical fiber being subjected to radial force, axial tension, pressure and torque at the same time, and is closer to the actual application scenario of the optical fiber; by inspecting output parameters such as light beams, the physical toughness and damage state of the optical fiber in different states can be inspected, so as to determine whether there is a risk in using the optical fiber in different states. Summary of the invention

[0010] In view of the shortcomings of the prior art that the optical fiber can only be inspected under different bending degrees and when it is only subjected to radial force, and has low applicability and low detection efficiency, the present invention provides a system and method for optical fiber inspection, which can simulate the force conditions of optical fibers under different bending radians and different diameters, and their corresponding light beam parameters, thereby improving the inspection efficiency and applicability, and making the test results closer to actual application scenarios.

[0011] The technical solution of the present invention is as follows:

[0012] A semiconductor laser optical fiber inspection system includes an inspection platform, an optical fiber holder, and a detector. The inspection platform is provided with a guide groove bottom plate, the guide groove bottom plate is provided with a guide groove, a limit rod is arranged through the guide groove, the other end of the limit rod is connected to a drive motor 2, and the drive motor 2 drives the limit rod to move in the guide groove. A z column is provided next to the inspection platform, and a drive motor 1 is provided on the z column. The drive motor 1 is connected to a pressure plate, and the drive motor 1 drives the pressure plate to move up and down along the z column; the pressure plate is provided with a groove of the same shape as the guide groove of the guide groove bottom plate, so that when the pressure plate is pressed downward, it can pass through the limit rod to apply pressure to the optical fiber wound on the limit rod;

[0013] One end of the optical fiber is connected to the laser, and the other end of the optical fiber bypasses the limit rod and is connected to the optical fiber holder. The optical fiber beam is emitted from the laser to the detector, and the detector records the beam parameters.

[0014] Preferably, the guide groove includes a circular groove and a cross groove, and the center of the cross groove coincides with the center of the circle.

[0015] Further preferably, the number of the circular grooves is at least two, which are arranged as concentric circles with different diameters.

[0016] Preferably, there are at least two limit rods, each of which is connected to a driving motor, and each limit rod moves independently. Multiple limit rods can move arbitrarily in the guide groove to achieve various optical fiber bending requirements. The independent movement of each limit rod can also be controlled by a motor and an integrated system.

[0017] Preferably, the detector and the optical fiber holder are arranged on the same movable plate, a guide rail is arranged below the movable plate, and the movable plate moves along the guide rail. When the movable plate moves, an axial pulling force is provided to the optical fiber.

[0018] Preferably, a laser fixing seat is provided under the laser.

[0019] Preferably, a protruding structure is provided on the lower surface of the pressure plate, which can simulate actual force according to different actual conditions.

[0020] Preferably, the guide groove bottom plate and the detection platform are arranged horizontally or tilted, and a connecting plate is hingedly provided at the output end of the driving motor 1, and the connecting plate is connected to the pressure plate. When the connecting plate is tilted, the pressure plate can cover the upper surface of the guide groove bottom plate by rotating the angle between the connecting plate and the output end of the driving motor 1. The tilted setting simulates the situation in which the optical fibers are not in the same horizontal plane but are distributed three-dimensionally in space in actual situations.

[0021] Preferably, the optical fiber holder is an L-shaped plate with a turntable provided on the plate. The turntable is connected to the L-shaped plate bearing, and the optical fiber is fixed at the center of the turntable. The turntable can rotate on the L-shaped plate. The rotation of the turntable drives the optical fiber to twist, providing simulated torque for testing.

[0022] Further preferably, the rotating disk is provided with scales, and a positioning pin is further provided between the rotating disk and the L-shaped plate. After the rotating disk rotates through a certain scale (usually within 90°), the angle is fixed by the positioning pin.

[0023] A method for inspecting a semiconductor laser optical fiber inspection system comprises the following steps:

[0024] (1) Fix the semiconductor laser on the laser fixing seat, and the optical fiber passes through or winds around the space formed by the limit rod. The limit rod is controlled by the driving motor 2 to move to the corresponding X / Y coordinate in the guide groove. The bending radius and bending shape of the optical fiber are changed by using the different positions of the limit rod in the guide groove;

[0025] (2) The other end of the optical fiber is connected to the optical fiber holder. According to the needs, different motors are controlled to apply pressure, axial tension, and torque to the optical fiber. When pressure needs to be applied, the driving motor 1 is used to drive the pressure plate to apply pressure downward. When axial tension is required, the optical fiber holder is driven to move by moving the moving plate, thereby providing axial tension to the optical fiber. When torque is required, the turntable is rotated to twist the optical fiber, and the test results are obtained using the detector to simulate the test of the loss and damage of the optical fiber under different stress states.

[0026] The beneficial effects of the present invention are:

[0027] 1. The detection device and method described in the present invention can freely control and switch the bending shape to realize the force inspection of the optical fiber under various bending states.

[0028] 2. The detection device and method described in the present invention can simulate the loss state of the optical fiber when the optical fiber is subjected to complex stress conditions such as radial force, axial force, torsion and extrusion at the same time.

[0029] 3. The detection device and method described in the present invention can be customized in shape or combined in shape, is easy to operate, has high versatility, and can reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the inspection system of the semiconductor laser optical fiber of the present invention;

[0031] Figure 2 It is a schematic diagram of the structure of the pressure plate pressing down;

[0032] Figure 3 is a schematic diagram of the structure of the pressure plate;

[0033] Figure 4 is a schematic diagram of the structure of an optical fiber holder;

[0034] Figure 5 A schematic diagram of the structure in which the guide groove bottom plate is inclined;

[0035] In the figure: 1. laser fixing seat; 2. laser; 3. drive motor 1; 4. limit rod; 5. detector; 6. guide rail; 7. optical fiber holder; 8. drive motor 2; 9. pressure plate; 10. turntable. DETAILED DESCRIPTION

[0036] The present invention will be further described below by way of embodiments in conjunction with the accompanying drawings, but is not limited thereto.

[0037] Embodiment 1:

[0038] A semiconductor laser fiber inspection system, such as Figure 1 , Figure 2As shown, it includes an inspection table, an optical fiber holder 7, and a detector 5. The inspection table is provided with a guide groove bottom plate, the guide groove bottom plate is provided with a guide groove, a limit rod 4 is arranged through the guide groove, and the other end of the limit rod is connected to a drive motor 2 8, and the limit rod is driven by the drive motor 2 to move in the guide groove. A z column is provided next to the inspection table, and a drive motor 1 3 is provided on the z column. The drive motor 1 is connected to a pressure plate 9, and the drive motor 1 drives the pressure plate 9 to move up and down along the z column; a groove with the same shape as the guide groove of the guide groove bottom plate is provided on the pressure plate, so that when the pressure plate is pressed downward, pressure is applied to the optical fiber wound around the limit rod through the limit rod, and the pressure is applied to the upper surface of the optical fiber, thereby applying different pressures of extrusion to the optical fiber. The reliability of the optical fiber is realized when it is subjected to extrusion pressure at the same time under simulated different bending radii of the optical fiber. In this embodiment, the guide groove bottom plate is arranged horizontally. At the same time, the pressure plate can switch its shape based on actual needs to meet the extrusion force analysis of complex structures. The pressure plate with a convex structure is as follows Figure 3 shown.

[0039] One end of the optical fiber is connected to the laser 2, and the other end of the optical fiber is connected to the optical fiber holder 7 by bypassing the limit rod 4. The optical fiber is wound on the limit rod according to the detection requirements, and the laser is powered on. The optical fiber beam is sent from the laser 2 to the detector 5, and the laser parameters are collected by the detector. By comparing with the initial parameters of the laser, the loss of the optical fiber under different bending radii can be detected, that is, the loss value of the optical fiber when the optical fiber is subjected to radial force can be calculated; the reliability of the simulated laser under radial force in actual use can be achieved.

[0040] In this embodiment, the guide groove includes two circular grooves and a cross groove, the center of the cross groove coincides with the center of the circle, and the two circular grooves are concentric circles with different diameters. There are four limit rods, each of which is connected to a drive motor, and each limit rod moves independently, controlling multiple limit rods to move arbitrarily in the guide groove, thereby controlling the optical fiber to present different bending radii and achieving various optical fiber bending requirements.

[0041] Embodiment 2:

[0042] A semiconductor laser optical fiber inspection system, the structure of which is as described in Example 1, except that Figure 4 As shown, the detector 5 and the optical fiber holder 7 are arranged on the same moving plate, and a guide rail 6 with scale is arranged under the moving plate, and the moving plate moves along the guide rail. When the moving plate moves, an axial tension is provided, and a quantifiable tension value is applied to the optical fiber, so that the optical fiber bears the axial tension. On the basis of Embodiments 1 and 2, the guide rail 6 with scale is used to realize the loss value of the optical fiber when the laser is subjected to pressure and axial tension at the same time in actual use, so as to measure the reliability of the optical fiber at this time.

[0043] Embodiment 3:

[0044] A semiconductor laser optical fiber inspection system, the structure of which is as described in Example 1, except that a laser fixing seat 1 is provided below the laser 2.

[0045] Embodiment 4:

[0046] A semiconductor laser optical fiber inspection system, the structure of which is as described in Example 1, except that a protruding structure is provided on the lower surface of the pressure plate, which can simulate actual force according to different actual conditions.

[0047] Embodiment 5:

[0048] A semiconductor laser optical fiber inspection system, the structure of which is as described in Example 2, except that the guide groove bottom plate and the inspection platform are arranged obliquely, such as Figure 5 As shown, the output end of the drive motor 1 is hingedly provided with a connecting plate, and the connecting plate is connected to the pressure plate. When the connecting plate is tilted, the pressure plate can cover the upper surface of the guide groove bottom plate by rotating the angle between the connecting plate and the output end of the drive motor 1. The tilted setting simulates the actual situation that the optical fiber is not in the same horizontal plane, but is distributed three-dimensionally in space. By changing the shape and quantity of the guide groove bottom plate and the limit rods, the coordinate control of the X / Y / Z three-dimensional space can be realized, and the reliability of the optical fiber under different bending states in the three-dimensional space can be simulated, so that the test is more accurate and close to the actual use state of the optical fiber.

[0049] Embodiment 6:

[0050] A semiconductor laser optical fiber inspection system, the structure of which is as described in Example 2, except that the optical fiber holder is an L-shaped plate with a turntable, such as Figure 4 As shown in the figure, the turntable is connected to the L-shaped plate bearing, the optical fiber is fixed at the center of the turntable, and the turntable can rotate on the L-shaped plate. The rotation of the turntable drives the optical fiber to twist, providing simulated torque for testing. A quantifiable torque is applied to the optical fiber to achieve the reliability of the simulated optical fiber under complex stress conditions such as radial force, axial tension, pressure and torque.

[0051] The turntable is provided with scales, and a positioning pin is also provided between the turntable and the L-shaped plate. After the turntable rotates through a certain scale (usually within 90°), the angle is fixed by the positioning pin.

[0052] Embodiment 7:

[0053] A method for inspecting the semiconductor laser optical fiber inspection system of Example 6 comprises the following steps:

[0054] (1) Fix the semiconductor laser on the laser fixing seat, and the optical fiber passes through or winds around the space formed by the limit rod. The limit rod is controlled by the driving motor 2 to move to the corresponding X / Y coordinate in the guide groove. The bending radius and bending shape of the optical fiber are changed by using the different positions of the limit rod in the guide groove;

[0055] (2) The other end of the optical fiber is connected to the optical fiber holder. According to the needs, different motors are controlled to apply pressure, axial tension, and torque to the optical fiber. When pressure needs to be applied, the driving motor 1 is used to drive the pressure plate to apply pressure downward. When axial tension is required, the optical fiber holder is driven to move by moving the moving plate, thereby providing axial tension to the optical fiber. When torque is required, the turntable is rotated to twist the optical fiber, and the test results are obtained using the detector to simulate the test of the loss and damage of the optical fiber under different stress states.

Claims

1. A semiconductor laser optical fiber inspection system, characterized in that: It includes an inspection table, an optical fiber holder, and a detector. The inspection table is provided with a guide groove bottom plate, the guide groove bottom plate is provided with a guide groove, a limit rod is arranged through the guide groove, the other end of the limit rod is connected to a drive motor 2, and the drive motor 2 drives the limit rod to move in the guide groove. A z column is provided next to the inspection table, and a drive motor 1 is provided on the z column. The drive motor 1 is connected to a pressure plate, and the drive motor 1 drives the pressure plate to move up and down along the z column; the pressure plate is provided with a groove of the same shape as the guide groove of the guide groove bottom plate; One end of the optical fiber is connected to the laser, and the other end of the optical fiber bypasses the limit rod and is connected to the optical fiber holder. The optical fiber beam is emitted from the laser to the detector, and the detector records the beam parameters.

2. The semiconductor laser optical fiber inspection system according to claim 1, characterized in that: The guide groove includes a circular groove and a cross groove, and the center of the cross groove coincides with the center of the circle.

3. The semiconductor laser optical fiber inspection system according to claim 2, characterized in that: The number of the circular grooves is at least two, and they are arranged as concentric circles with different diameters.

4. The semiconductor laser optical fiber inspection system according to claim 1, characterized in that: The number of the limiting rods is at least two, each limiting rod is connected to a driving motor, and each limiting rod moves independently.

5. The semiconductor laser optical fiber inspection system according to claim 1, characterized in that: The detector and the optical fiber holder are arranged on the same moving plate, a guide rail is arranged under the moving plate, and the moving plate moves along the guide rail.

6. The semiconductor laser optical fiber inspection system according to claim 1, characterized in that: A laser fixing seat is provided below the laser; Preferably, a protruding structure is provided on the lower surface of the pressure plate.

7. The semiconductor laser optical fiber inspection system according to claim 1, characterized in that: The guide groove bottom plate and the detection platform are arranged horizontally or tilted, and a connecting plate is hingedly provided at the output end of the driving motor 1, and the connecting plate is connected to the pressure plate.

8. The semiconductor laser optical fiber inspection system according to claim 1, characterized in that: The optical fiber holder is an L-shaped plate with a turntable on the plate. The turntable is connected to the L-shaped plate bearing, and the optical fiber is fixed at the center of the turntable.

9. The semiconductor laser optical fiber inspection system according to claim 8, characterized in that: The turntable is provided with scales, and a positioning pin is provided between the turntable and the L-shaped plate.

10. A method for inspecting a semiconductor laser optical fiber inspection system according to any one of claims 1 to 9, characterized in that: The steps include: (1) Fix the semiconductor laser on the laser fixing seat, and the optical fiber passes through or winds around the space formed by the limit rod. The limit rod is controlled by the driving motor 2 to move to the corresponding X / Y coordinate in the guide groove. The bending radius and bending shape of the optical fiber are changed by using the different positions of the limit rod in the guide groove; (2) The other end of the optical fiber is connected to the optical fiber holder. According to the needs, different motors are controlled to apply pressure, axial tension, and torque to the optical fiber. When pressure needs to be applied, the driving motor 1 is used to drive the pressure plate to apply pressure downward. When axial tension is required, the optical fiber holder is driven to move by moving the moving plate, thereby providing axial tension to the optical fiber. When torque is required, the turntable is rotated to twist the optical fiber, and the test results are obtained using the detector to simulate the test of the loss and damage of the optical fiber under different stress states.

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