A high-efficiency fiber coupling system based on coupling-end multimode quantization free space

Abstract

The application relates to the technical field of optical fiber coupling, in particular to a multi-mode quantitative free-space high-efficiency optical fiber coupling system based on a coupling end, which comprises a placing table, a supporting mechanism is arranged on the placing table, a lens mechanism is arranged on the placing table, an aperture mechanism is arranged on the placing table, an optical fiber is arranged on the aperture mechanism, a light-taking mechanism is arranged on the placing table, an adjusting mechanism is arranged on the light-taking mechanism, and a detecting mechanism is arranged on the placing table; the distance between the aperture and the lens can be adjusted through the aperture mechanism; the lens assembly can be conveniently and quickly installed and replaced through the lens mechanism; the angle of the sampling mirror main body can be finely adjusted through the light-taking mechanism and the adjusting mechanism, and the reflection angle of the mirror main body can be adjusted when the mirror main body is affected; the quantitative position feedback of the intensity distribution sensor and the in-fiber coupling efficiency are used for real-time quantitative monitoring feedback, so that the coupling end can quantitatively assist in improving the effective utilization rate of optical energy into the fiber.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical fiber coupling, in particular to a multi-modal quantitative free-space high-efficiency optical fiber coupling system based on a coupling end. BACKGROUND

[0002] The optical fiber coupling device is an element for realizing free-space optical signal branching / combining or for extending an optical fiber link, and belongs to the field of optical passive elements. The device is applied in a telecommunication network, a cable television network, a user loop system and a regional network. Various free-space optical fiber coupling devices are roughly adjusted by a rear reference and a front aperture diaphragm, and a power meter is used for power reference adjustment at an optical fiber exit end. The traditional free-space optical fiber coupling device has poor stability and coupling efficiency.

[0003] However, in actual operation, the aperture diaphragm for adjusting light in the traditional free-space optical fiber coupling device is fixedly arranged. When the lens changes, the appropriate distance between the aperture diaphragm and the lens also changes, thereby affecting the adjustment of the aperture diaphragm on light. Meanwhile, some stray light and unnecessary light are generated in the operation process, which easily causes certain interference to the quantitative process. Meanwhile, the traditional lens needs to be fixed by some bolts during fixed arrangement, which is troublesome. In addition, the sampling mirror and the reflector are fixed and set in advance. However, in a long-term operation process, the reflector is easily affected by various external factors, and the reflection angle of light is easily deviated slightly, thereby reducing the coupling efficiency and causing unnecessary error influence on the detection result, especially for the traditional free-space optical fiber coupling device with a small fiber core, the coupling efficiency is lost in a small error. SUMMARY

[0004] In view of the problems in the prior art, the present application provides a multi-modal quantitative free-space high-efficiency optical fiber coupling system based on a coupling end.

[0005] The technical scheme adopted by the present application to solve the technical problems is as follows: a multi-modal quantitative free-space high-efficiency optical fiber coupling system based on a coupling end, comprising a mounting table, a supporting mechanism is arranged on the mounting table, a lens mechanism is arranged on the mounting table, an aperture diaphragm mechanism is arranged on the mounting table, an optical fiber is arranged on the aperture diaphragm mechanism, a light taking mechanism is arranged on the mounting table, an adjusting mechanism is arranged on the light taking mechanism, and a detecting mechanism is arranged on the mounting table.

[0006] The diaphragm mechanism includes support plates, the installation table is fixedly connected with two support plates, the installation table is fixedly connected with a protruding block, a knob is arranged on the support plate, the knob extends to the inside of the support plate and is connected with a first gear, a second gear is engaged with the first gear, and the diameter of the first gear is smaller than that of the second gear, a first lead screw is fixedly connected to the second gear, the first lead screw is rotatably connected to the inside of the protruding block, and a variable diaphragm is slidably connected to the installation table and the protruding block, and the first lead screw is screwedly connected to the inside of the variable diaphragm.

[0007] Specifically, the support mechanism includes support rods, the installation table is fixedly connected with a plurality of support rods, and the support rods are fixedly connected with support bases.

[0008] Specifically, the lens mechanism includes fixed plates, the installation table is fixedly connected with two fixed plates, a fixed seat is arranged on the fixed plate, a snap ring is fixedly connected to the fixed seat, a lens body is arranged on the snap ring, a pressing block is slidably connected to the fixed seat, a clamping rod is fixedly connected to the pressing block, the clamping rod is slidably connected to the inside of the fixed seat, the clamping rod is clamped to the fixed plate, a spring is fixedly connected to the pressing block, the spring is wound on the clamping rod, and the spring is fixedly connected to the inside of the fixed seat, one of the lens bodies is provided with an optical fiber, and the optical fiber penetrates one of the support plates.

[0009] Specifically, the light taking mechanism includes a protective cover, the protective cover is clamped to the installation table, a light filter spectrometer is fixedly connected to the installation table, an adjusting seat is fixedly connected to the light filter spectrometer, a rotating shaft is rotatably connected to the adjusting seat, a sampling mirror is fixedly connected to the rotating shaft, two reflecting mirrors are arranged on the installation table, the adjusting mechanism includes a rotating block, the rotating block is arranged on the adjusting seat, the rotating block extends to the inside of the adjusting seat and is connected with a third gear, a fourth gear is engaged with the third gear, a second lead screw is fixedly connected to the fourth gear, a resisting rod is slidably connected to the inside of the adjusting seat, the second lead screw is screwedly connected to the inside of the resisting rod, the end portion of the resisting rod is arc-shaped, a torsion spring is wound on the rotating shaft, and the torsion spring is fixedly connected to the sampling mirror and the adjusting seat.

[0010] Specifically, the detection feedback mechanism includes an installation frame, the installation frame is arranged on the installation table, a neutral density attenuation sheet is mounted on the installation frame, and a light intensity distribution detector body is mounted on one of the support plates.

[0011] The beneficial effects of the present application are:

[0012] (1) The one based on the coupling end multimodal quantitative free space efficient fiber coupling system, when using, the diaphragm mechanism is arranged on the installation table, through the diaphragm mechanism, so that the diaphragm can be conveniently adjusted according to the actual situation during operation The spacing between the lens can be properly adjusted, so that the diaphragm can always maintain proper regulation and control of light; That is: in actual operation, when the lens assembly changes, the user can manually rotate the knob according to the actual situation, the knob drives the first gear to rotate, the first gear drives the second gear to rotate, and the second gear drives the first lead screw to rotate, with the rotation of the first lead screw, the variable diaphragm is driven to move, so that the variable diaphragm is close to or away from the lens assembly, so that the spacing between the variable diaphragm and the lens assembly can be conveniently adjusted according to the actual situation during operation.

[0013] (2) The one based on the coupling end multimodal quantitative free space efficient fiber coupling system, when using, the lens mechanism is arranged on the installation table, through the lens mechanism, so that the lens assembly can be conveniently and quickly installed and replaced without the need for bolts and other assembly parts, so that the use is more convenient; That is: in actual operation, the user can manually hold the fixed seat and press the two pressing blocks thereon, then the pressing block moves under pressure, and the clamping rod moves together, and the spring is compressed at the same time, until the clamping rod is retracted into the fixed seat, then, the fixed seat is inserted into the fixed plate, then the pressing block is loosened, then under the action of the spring, the clamping rod will be automatically clamped into the fixed plate, the fixed seat and the lens body thereon are fixed and arranged, so that the lens body can be conveniently and quickly installed and replaced without the need for bolts and other assembly parts, so that the use is more convenient.

[0014] (3) The quantitative free space high-efficiency optical fiber coupling system based on the coupling end multimode is characterized in that: the light taking mechanism is arranged on the placing table, and the adjusting mechanism is arranged on the light taking mechanism; the sampling angle of the sampling mirror main body can be finely adjusted according to actual conditions through the cooperation of the light taking mechanism and the adjusting mechanism, so that the reflection angle of the reflecting mirror main body can be adjusted when the reflecting mirror main body is affected, and a large error of the detection result is avoided.

[0015] (4) The quantitative free space high-efficiency optical fiber coupling system based on the coupling end multimode is characterized in that: the incident light is divided into two paths by the sampling mirror, high transmission and low reflection, and the reflection part is used for reference assistance; the transmission part is sent into the optical fiber coupling front end through the optical filter and the light splitter, the back reflection light of the optical fiber end face position is sent into the light intensity distribution detector main body through the lens group and other elements to perform quantitative monitoring feedback; meanwhile, the mechanism arranged and combined in this way has high coupling transmission efficiency and stable coupling efficiency maintaining ability. BRIEF DESCRIPTION OF DRAWINGS

[0016] The application will be further described below in combination with the drawings and examples.

[0017] Figure 1 The whole structure schematic diagram of a preferred embodiment of the quantitative free space high-efficiency optical fiber coupling system based on the coupling end multimode is provided.

[0018] Figure 2 The connection structure schematic diagram of the placing table, the lens mechanism and the diaphragm mechanism is provided.

[0019] Figure 3 The structure schematic diagram of the lens mechanism is provided.

[0020] Figure 4 The connection structure schematic diagram of the placing table, the light taking mechanism and the adjusting mechanism is provided.

[0021] Figure 5 The structure schematic diagram of the adjusting mechanism is provided. Figure 1A part structure enlargement schematic view shown in the figure;

[0022] Figure 6 For Figure 2 B part structure enlargement schematic view shown in the figure;

[0023] Figure 7 For Figure 4 C part structure enlargement schematic view shown in the figure.

[0024] In the figure: 1, installation platform; 2, support mechanism; 201, support rod; 202, support; 3, lens mechanism; 301, lens body; 302, fixed seat; 303, fixed plate; 304, pressing block; 305, clamping rod; 306, spring; 307, clamping ring; 4, diaphragm mechanism; 401, support plate; 402, protrusion; 403, knob; 404, first gear; 405, second gear; 406, first screw rod; 407, variable diaphragm; 5, optical fiber; 6, light taking mechanism; 601, shield; 602, light filter spectrometer; 603, adjusting seat; 604, sampling mirror; 605, reflecting mirror; 606, rotating shaft; 7, adjusting mechanism; 701, rotating block; 702, third gear; 703, fourth gear; 704, second screw rod; 705, resisting rod; 706, torsion spring; 8, detection feedback mechanism; 801, installation frame; 802, neutral density attenuation sheet; 803, light intensity distribution detector body. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0026] As Figures 1-7 shown, the present application provides a kind of based on coupling end multimodal quantitative free space high-efficiency fiber coupling system, including installation platform 1, the installation platform 1 is equipped with support mechanism 2, the installation platform 1 is equipped with lens mechanism 3, the installation platform 1 is equipped with diaphragm mechanism 4, the diaphragm mechanism 4 is equipped with optical fiber 5, the installation platform 1 is equipped with light taking mechanism 6, the light taking mechanism 6 is equipped with adjusting mechanism 7, the installation platform 1 is equipped with detection feedback mechanism 8;

[0027] The diaphragm mechanism 4 includes a support plate 401, two support plates 401 are fixedly connected on the installation table 1, a protruding block 402 is fixedly connected on the installation table 1, a knob 403 is arranged on the support plate 401, the knob 403 extends to the inside of the support plate 401 and is connected with a first gear 404, the first gear 404 is engaged with a second gear 405, and the diameter of the first gear 404 is smaller than that of the second gear 405, a first lead screw 406 is fixedly connected on the second gear 405, the first lead screw 406 is rotatably connected in the inside of the protruding block 402, a variable diaphragm 407 is slidably connected on the installation table 1 and the protruding block 402, and the first lead screw 406 is threadedly connected in the inside of the variable diaphragm 407; in use, the diaphragm mechanism 4 is arranged on the installation table 1, and the diaphragm mechanism 4 is used to conveniently adjust the distance between the diaphragm and the lens according to the actual situation during operation, so that the diaphragm can always properly regulate the light; that is, in actual operation, when the lens assembly changes, the user can manually rotate the knob 403 according to the actual situation, the rotation of the knob 403 drives the rotation of the first gear 404, the rotation of the first gear 404 drives the rotation of the second gear 405, the rotation of the second gear 405 drives the rotation of the first lead screw 406, and the rotation of the first lead screw 406 drives the movement of the variable diaphragm 407, so that the variable diaphragm 407 is close to or away from the lens assembly, thereby conveniently adjusting the distance between the variable diaphragm 407 and the lens assembly according to the actual situation during operation, so that the variable diaphragm 407 can always properly regulate the light; meanwhile, it can assist in preliminary coupling and qualitative reference, and another special function is to assist the front-end coupling quantitative detection device in limiting the retroreflected light and stray light.

[0028] Specifically, the support mechanism 2 includes a support rod 201, a plurality of support rods 201 are fixedly connected on the installation table 1, and a support base 202 is fixedly connected on the support rod 201; in use, the support rod 201 and the support base 202 are used to conveniently fix and arrange the entire device.

[0029] Specific, the lens mechanism 3 includes a fixed plate 303, the installation platform 1 is fixedly connected with two fixed plate 303, the fixed plate 303 is equipped with fixed seat 302, the fixed seat 302 is fixedly connected with the snap ring 307, the snap ring 307 is equipped with lens body 301, the fixed seat 302 is slidably connected with the pressing block 304, the pressing block 304 is fixedly connected with the clamping rod 305, the clamping rod 305 is slidably connected in the fixed seat 302, and the clamping rod 305 is clamped in the fixed plate 303, the pressing block 304 is fixedly connected with the spring 306, the spring 306 is wound on the clamping rod 305, and the spring 306 is fixedly connected in the fixed seat 302, one of the lens body 301 is equipped with optical fiber 5, the optical fiber 5 is through in one of the support plate 401;When using, the lens mechanism 3 is arranged on the installation platform 1, through the lens mechanism 3, the lens assembly can be conveniently and quickly installed and replaced, without screw and other assembly parts, so that the use is more convenient;That is: in actual operation, the user can manually hold the fixed seat 302 and press the two pressing blocks 304 thereon, the pressing block 304 is moved under pressure, thereby driving the clamping rod 305 to move, the spring 306 is compressed at the same time, until the clamping rod 305 is retracted into the fixed seat 302, then, the fixed seat 302 is inserted into the fixed plate 303, then the pressing block 304 is released, under the action of the spring 306, the clamping rod 305 will be automatically clamped into the fixed plate 303, the fixed seat 302 and the lens body 301 thereon are fixed and arranged, so that the lens body 301 can be conveniently and quickly installed and replaced, without screw and other assembly parts, so that the use is more convenient.

[0030] Specifically, the light taking mechanism 6 comprises a shield 601, the shield 601 is clamped on the installation table 1, a light filter spectrometer 602 is fixedly connected on the installation table 1, an adjusting seat 603 is fixedly connected on the light filter spectrometer 602, a rotating shaft 606 is rotatably connected on the adjusting seat 603, a sampling mirror 604 is fixedly connected on the rotating shaft 606, two reflecting mirrors 605 are arranged on the installation table 1, the adjusting mechanism 7 comprises a rotating block 701, the rotating block 701 is arranged on the adjusting seat 603, the rotating block 701 extends into the adjusting seat 603 and is connected with a third gear 702, the third gear 702 is engaged with a fourth gear 703, the fourth gear 703 is fixedly connected with a second lead screw 704, a resisting rod 705 is slidably connected in the adjusting seat 603, the second lead screw 704 is threadedly connected in the resisting rod 705, the end of the resisting rod 705 is arc-shaped, a torsion spring 706 is wound on the rotating shaft 606 and is fixedly connected with the sampling mirror 604 and the adjusting seat 603; in use, the light taking mechanism 6 is arranged on the installation table 1, the adjusting mechanism 7 is arranged on the light taking mechanism 6, the light taking mechanism 6 and the adjusting mechanism 7 are matched, so that the sampling angle of the sampling mirror body can be finely adjusted according to actual conditions, the reflecting angle of the reflecting mirror body can be adjusted when the reflecting mirror body is affected, and large errors in detection results are avoided; that is, in actual operation, the user can disassemble the shield 601, the rotating block 701 can be rotated according to actual conditions, the rotating block 701 drives the third gear 702 to rotate, the third gear 702 drives the fourth gear 703 to rotate, the fourth gear 703 drives the second lead screw 704 to rotate, the second lead screw 704 drives the resisting rod 705 to move in the adjusting seat 603, the sampling mirror 604 is pushed by the resisting rod 705, the sampling mirror 604 is deflected around the rotating shaft 606, the sampling mirror 604 is always attached to the resisting rod 705 under the action of the torsion spring 706, the angle of the sampling mirror 604 is gradually deflected, the reflecting angle of the reflecting mirror 605 is changed, the sampling angle of the sampling mirror 604 can be finely adjusted according to actual conditions, the reflecting angle of the reflecting mirror 605 can be adjusted when the reflecting mirror 605 is affected, and unnecessary errors in detection results are avoided.

[0031] Specifically, the detection feedback mechanism 8 comprises a mounting frame 801, the mounting table 1 is provided with the mounting frame 801, a neutral density filter 802 is installed on the mounting frame 801, and a light intensity distribution detector main body 803 is installed on one of the supporting plates 401; in use, the sampling light reflected by the reflector 605 passes through the corresponding variable diaphragm 407 and the lens main body 301, then passes through the neutral density filter 802 on the mounting frame 801, and finally enters the inside of the light intensity distribution detector main body 803, and corresponding detection work is performed by the light intensity distribution detector main body 803.

[0032] In use, first, through the support rod 201 and the support 202, the whole device is fixed and arranged conveniently; in actual operation, the user can manually hold the fixed seat 302 and press the two pressing blocks 304 thereon, the pressing block 304 is pressed to move, and the clamping rod 305 is driven to move together, the spring 306 is compressed at the same time, until the clamping rod 305 is retracted into the fixed seat 302, then the fixed seat 302 is inserted into the fixed plate 303, and then the pressing block 304 is released, under the action of the spring 306, the clamping rod 305 is automatically clamped into the fixed plate 303, the fixed seat 302 and the lens body 301 thereon are fixed and arranged, so that the lens body 301 can be conveniently and quickly installed and replaced without bolts and other assembly parts, so that the use is more convenient; when the lens body 301 changes, according to the actual situation, the user can manually rotate the knob 403, the knob 403 drives the first gear 404 to rotate, the first gear 404 drives the second gear 405 to rotate, the second gear 405 drives the first lead screw 406 to rotate, and the variable diaphragm 407 is driven to move along with the rotation of the first lead screw 406, so that the variable diaphragm 407 is close to or away from the lens assembly, so that the distance between the variable diaphragm 407 and the lens assembly can be adjusted according to the actual situation during operation, so that the variable diaphragm 407 can always maintain proper regulation and control of light; at the same time, the user can disassemble the protective cover 601, according to the actual situation, the rotating block 701 can be rotated, the rotating block 701 drives the third gear 702 to rotate, the third gear 702 drives the fourth gear 703 to rotate, the fourth gear 703 drives the second lead screw 704 to rotate, and the second lead screw 704 drives the abutting rod 705 to move in the adjusting seat 603, and then the sampling mirror 604 is pushed and abutted, so that the sampling mirror 604 is deflected around the rotating shaft 606, and under the action of the torsional spring 706, the sampling mirror 604 is always attached to the abutting rod 705, so that the angle of the sampling mirror 604 is gradually deflected, so that the reflecting angle of the reflecting mirror 605 is changed, so that the sampling angle of the sampling mirror 604 can be finely adjusted according to the actual situation, so that the reflecting angle of the reflecting mirror 605 can be adjusted when the reflecting mirror 605 is affected, and the error of the detection result is avoided; in actual operation, the incident light is divided into two paths by the sampling mirror 604, high transmission and low reflection, the reflected part is used for reference and assistance; the transmitted part is sent into the optical fiber coupling front end through the optical filter 602, the back reflection light at the optical fiber end position is sent into the light intensity distribution detector main body 803 through the lens group and other elements for quantitative monitoring and feedback; at the same time, the mechanism arranged and combined in this way has high coupling transmission efficiency and stable coupling efficiency maintaining ability.

[0033] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identity of the reference signs therein.

[0034] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A high-efficiency fiber coupling system based on multi-modal quantitative free space coupling at the coupling end, characterized in that: The device comprises a mounting platform (1), wherein the mounting platform (1) is provided with a supporting mechanism (2), the mounting platform (1) is provided with a lens mechanism (3), the mounting platform (1) is provided with an aperture mechanism (4), the aperture mechanism (4) is provided with an optical fiber (5), the mounting platform (1) is provided with a light collecting mechanism (6), the light collecting mechanism (6) is provided with an adjusting mechanism (7), and the mounting platform (1) is provided with a monitoring feedback mechanism (8); The iris mechanism (4) comprises a support plate (401), two support plates (401) are fixedly connected to the placement platform (1), a protrusion (402) is fixedly connected to the placement platform (1), a knob (403) is provided on the support plate (401), the knob (403) extends into the interior of the support plate (401) and is connected to a first gear (404), a second gear (405) is meshed with the first gear (404), and the diameter of the first gear (404) is smaller than that of the second gear (405), a first screw rod (406) is fixedly connected to the second gear (405), the first screw rod (406) is rotatably connected to the interior of the protrusion (402), a variable iris (407) is slidably connected to the placement platform (1) and the protrusion (402), and the first screw rod (406) is threadedly connected to the interior of the variable iris (407).

2. The coupling-end multi-modal quantitative free-space high-efficiency fiber coupling system according to claim 1, characterized in that: The support mechanism (2) comprises a support rod (201), a plurality of support rods (201) are fixedly connected to the placement platform (1), and a support (202) is fixedly connected to the support rod (201).

3. The high-efficiency fiber coupling system based on coupled-end multi-modal quantitative free space according to claim 1, characterized in that: The lens mechanism (3) comprises a fixing plate (303), two fixing plates (303) are fixedly connected to the placement platform (1), a fixing seat (302) is provided on the fixing plate (303), a snap ring (307) is fixedly connected to the fixing seat (302), and a lens body (301) is provided on the snap ring (307).

4. The high-efficiency fiber coupling system based on coupled-end multi-modal quantitative free space according to claim 3, characterized in that: A pressing block (304) is slidably connected to the fixing seat (302), a clamping rod (305) is fixedly connected to the pressing block (304), the clamping rod (305) is slidably connected to the inside of the fixing seat (302), and the clamping rod (305) is clamped to the fixing plate (303).

5. The high-efficiency fiber coupling system based on coupled-end multi-modal quantitative free space according to claim 4, characterized in that: A spring (306) is fixedly connected to the pressing block (304), the spring (306) is wound around the clamping rod (305), and the spring (306) is fixedly connected to the inside of the fixing seat (302).

6. The coupling-end multi-modal quantitative free-space high-efficiency fiber coupling system according to claim 3, characterized in that: An optical fiber (5) is provided on one of the lens bodies (301), and the optical fiber (5) passes through one of the support plates (401).

7. The coupling-end multi-modal quantitative free-space high-efficiency fiber coupling system according to claim 1, characterized in that: The light collecting mechanism (6) comprises a protective cover (601), the protective cover (601) is engaged with the placement platform (1), a filter spectrometer (602) is fixedly connected to the placement platform (1), an adjustment seat (603) is fixedly connected to the filter spectrometer (602), a rotating shaft (606) is rotatably connected to the adjustment seat (603), a sampling mirror (604) is fixedly connected to the rotating shaft (606), and two reflecting mirrors (605) are provided on the placement platform (1).

8. The coupling-end multi-modal quantitative free-space high-efficiency fiber coupling system according to claim 7, characterized in that: The adjustment mechanism (7) comprises a rotating block (701), the adjusting seat (603) is provided with the rotating block (701), the rotating block (701) extends into the interior of the adjusting seat (603) and is connected to a third gear (702), the third gear (702) is meshed with a fourth gear (703), the fourth gear (703) is fixedly connected to a second screw rod (704), the interior of the adjusting seat (603) is slidably connected to a push rod (705), and the second screw rod (704) is threadedly connected to the interior of the push rod (705).

9. The coupling-end multi-modal quantitative free-space high-efficiency fiber coupling system according to claim 8, characterized in that: The end of the support rod (705) is arc-shaped, a torsion spring (706) is wound around the rotating shaft (606), and the torsion spring (706) is fixedly connected to the sampling mirror (604) and the adjustment seat (603).

10. The coupling-end multi-modal quantitative free-space high-efficiency fiber coupling system according to claim 1, characterized in that: The monitoring feedback mechanism (8) comprises a placement frame (801), the placement platform (1) is provided with the placement frame (801), a neutral density attenuation sheet (802) is installed on the placement frame (801), and a light intensity distribution detector body (803) is installed on one of the support plates (401).

Images