CN111596408B - High-power fiber laser indication light protection device and implementation method thereof - Google Patents
High-power fiber laser indication light protection device and implementation method thereof Download PDFInfo
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- CN111596408B CN111596408B CN202010446403.4A CN202010446403A CN111596408B CN 111596408 B CN111596408 B CN 111596408B CN 202010446403 A CN202010446403 A CN 202010446403A CN 111596408 B CN111596408 B CN 111596408B
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
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- G—PHYSICS
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- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
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Abstract
The invention discloses an indicating light protection device of a high-power optical fiber laser and an implementation method thereof, belonging to the field of optical fiber lasers and comprising an indicating light laser, an optical fiber winding mechanism and a cladding light stripping mechanism, wherein optical fibers connected with the indicating light laser are connected with two groups of optical fiber winding mechanisms and cladding light stripping mechanisms; the reverse fiber core light and the cladding light of the high-power optical fiber laser can be effectively stripped through the twice cladding light stripping mechanisms and the step stripping, so that the indicating light laser is protected from being damaged, and the attenuation of the indicating light intensity is avoided.
Description
Technical Field
The invention relates to the technical field of fiber lasers, in particular to a high-power fiber laser indicating light protection device and an implementation method thereof.
Background
The high-power laser has the advantages of good beam quality, high continuous power, good stability, small volume, convenient movement and the like, and is widely applied to the fields of industrial processing and the like.
In a high-power optical fiber laser, a forward and reverse bidirectional pumping mode is usually adopted, and due to the influences of the structure of a resonant cavity, the nonlinear effect in the resonant cavity and the like, reverse signal light is very strong, the power can reach dozens of or even hundreds of watts, and a large amount of reverse signal light can damage an indicating light device and destroy the use of the indicating light. Therefore, the indication light protection device with reasonable design and compact structure is very important for high-power fiber lasers.
At present, devices such as an optical fiber circulator, a dichroic mirror and the like are mainly used for isolating reverse signal light. But the fiber optic circulator does not simultaneously isolate pump light and signal light of different wavelengths. The dichroic mirror leads to a space structure, so that the stability of the system is weaker than that of an all-fiber structure, and the indicating light protection device with the all-fiber structure has a simple structure and high stability, but the conventional difficulty of stripping reverse fiber core light exists, and the reverse fiber core light and cladding light cannot be effectively stripped.
Therefore, the conventional fiber laser indicating light protection device cannot simultaneously strip the reverse fiber core signal light and the cladding signal light, has a complex structure and high cost, and is not suitable for mass production application of high-power fiber lasers.
Disclosure of Invention
The invention aims to provide an indication light protection device of a high-power optical fiber laser and an implementation method thereof, which can effectively strip reversed core light and cladding light in the high-power optical fiber laser, convert the core light into the cladding light through an optical fiber winding mechanism, and strip the cladding light through a cladding light stripping mechanism; the reverse fiber core light and the cladding light of the high-power fiber laser can be effectively stripped through the optical fiber winding mechanism and the cladding light stripping mechanism twice respectively, the indicating light laser is protected from being damaged, the heat generated by stripping the cladding light is dissipated through the heat dissipation plate or the water cooling plate, meanwhile, the heat generated by loss in the optical fiber wire in the optical fiber winding mechanism can also be dissipated through the heat conduction glue and the heat dissipation plate in time, the diameter of the used optical fiber winding mechanism, the selected optical fiber and the winding length are theoretically calculated and experimentally verified, the reverse fiber core light passing through the optical fiber wire can be converted into the cladding light through the optical fiber winding mechanism, the attenuation of the indicating light intensity cannot be caused, a lens is not needed to adjust the light path, the system is simple and clear, and is convenient to operate, and the problem brought forward in the background technology is solved.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a high power fiber laser instructs light protection device, is including instructing light laser, optic fibre wire winding mechanism and cladding light stripping mechanism, the optic fibre of instructing light laser last connection is crisscross to be connected with two sets of cladding light stripping mechanism and optic fibre wire winding mechanism, and optic fibre includes fibre core and cladding, and the cladding is in the outside of fibre core, and optic fibre wire winding mechanism is used for changing the diameter that optic fibre coiled, and the angle that optic fibre is crooked changes, and the fibre core light in the optic fibre enters into in the cladding by the fibre core.
Further, optic fibre winding mechanism includes preceding support frame group, back support frame group, the wire winding curb plate, rotation axis and wire winding telescopic machanism, insert the convex rotation axis in both ends on the top bearing of preceding support frame group and back support frame group, and fix two wire winding curb plates on the rotation axis outer wall between support frame group and the back support frame group in the front, wire winding telescopic machanism fixes on the rotation axis between two wire winding curb plates, optic fibre winding is on wire winding telescopic machanism, and the diameter through wire winding telescopic machanism is flexible, change the crooked angle of optic fibre.
Further, covering light stripping off mechanism is including peeling off the shell, the through-hole, adjust the pole, go up the pinch roller, pinch roller and louvre down, the through-hole is processed along the length direction who peels off the shell, and run through the peeling off shell, louvre and through-hole intercommunication of processing on the top of peeling off the shell, the regulation pole of peeling off the shell front end meshing extends to the through-hole and with last pinch roller swing joint, push down under the last pinch roller take turns both ends and peel off shell swing joint, it reciprocates to drive the pinch roller through adjusting the pole, control and push down the interval between the wheel, it is not less than the diameter of optic fibre line to go up the pinch roller and push down to form the interval between the wheel.
Furthermore, the top ends of the indicating light laser, the optical fiber winding mechanism and the cladding light stripping mechanism are all installed on a heat dissipation plate or a water cooling plate, heat generated by cladding light conduction in the cladding light stripping mechanism is dissipated through the heat dissipation plate or the water cooling plate, and the optical fiber winding mechanism can timely dissipate heat generated by reverse signal light loss through the heat dissipation plate or heat conducting glue.
Further, wire winding telescopic machanism is including being responsible for, the accessory pipe, the arc board, ventilate and be responsible for and the branch pipe of ventilating, be responsible for the setting of the global equidistant of winding the rotation axis, and be responsible for and be linked together with the inside of rotation axis, the rotation axis is located the outside port of preceding carriage group and back carriage group, one end is closed, one end opening, the branch pipe of ventilating of activity is inserted in the opening of its two rotation axes, the port of the branch pipe of ventilating of both sides all is connected with the one end of being responsible for of ventilating, the accessory pipe is inserted in the main pipe, the gas that lets in the main pipe of ventilating sees through the branch pipe of ventilating and the rotation axis gets into to be responsible for in the accessory pipe, the accessory pipe is movable from top to bottom in being responsible for under the effect of atmospheric pressure, the arc board is fixed in the outside of accessory pipe, and synchronous and the accessory pipe is flexible.
Furthermore, a shaft penetrating through the center of the upper pressing wheel is inserted into a chute processed along the vertical direction of the peeling shell, the shaft of the upper pressing wheel slides up and down along the chute, and a shaft penetrating through the center of the lower pressing wheel is inserted into a bearing of the peeling shell.
Furthermore, symmetrical clamping grooves are processed on the center line of the upper pressure wheel, the bottom end face of the adjusting rod is inserted into the rotating T-shaped rod, two ends of the T-shaped rod are inserted into the clamping grooves and used for driving the upper pressure wheel to lift, and the upper pressure wheel does not rotate synchronously along with the adjusting rod.
Furthermore, in the minimum stroke of the auxiliary pipe retracting into the main pipe, the arc plates are mutually contacted to form a complete circular ring structure, and the diameter of the optical fiber wire wound outside the arc plates is minimum; and the auxiliary pipe extends out of the main pipe by the maximum stroke, a circular ring structure with gaps at equal intervals is formed among the arc plates, and the diameter of the optical fiber wire wound outside the arc plates is maximum.
The invention provides another technical scheme that: the implementation method of the high-power fiber laser indicating light protection device comprises the following steps:
s1: in a working state, part of fiber core light and cladding light in the high-power fiber laser are reflected to the indicating light laser, if the part of light is not stripped in time, the indicating light laser can be irreversibly damaged, and the indicating light laser can not work normally in serious cases;
s2: the fiber core light and the cladding light enter the fiber in the right fiber winding mechanism, the diameter of the right fiber winding mechanism is obtained through theoretical calculation and experimental verification, the amount of gas introduced into the ventilation main pipe is adjusted, so that a circular ring structure with equally spaced gaps is formed among a plurality of arc plates, the angle of reflected light of the fiber winding mechanism is adjusted by changing the bending angle of the fiber wound on the fiber winding mechanism, the reflected light is smaller than a certain angle, refracted light is generated, and most of the fiber core light enters the cladding from the fiber core;
s3: when the fiber passes through the right cladding light stripping mechanism, the backward signal light in the cladding is uniformly guided out, at the moment, part of the backward signal light still remains in the fiber core and continues to pass through the fiber winding mechanism on the left side, and the remaining backward signal light enters the cladding from the fiber core in the same way;
s4: and finally, when the optical fiber passes through the left cladding light stripping mechanism, the reverse signal light of the cladding is uniformly guided out, at the moment, most of the reverse signal enters the cladding, and the reverse signal light is stripped from the optical fiber through the cladding light stripping mechanism.
Further, regarding to the characteristic that the wavelengths of the indication light and the backward light emitted by the indication light laser are different in step S1, the theoretical calculation and the experimental verification verify that the proper optical fiber type, length and winding radius are designed, and the indication light can be transmitted through the fiber core of the indication light protection device without loss while the backward light of the optical fiber laser is stripped.
Compared with the prior art, the invention has the beneficial effects that:
1. the high-power fiber laser indication light protection device and the implementation method thereof can effectively strip reverse fiber core light and cladding light in the high-power fiber laser, and convert the fiber core light into the cladding light through the fiber winding mechanism; the reverse fiber core light and the cladding light of the high-power optical fiber laser can be effectively stripped through the twice cladding light stripping mechanisms and the step-by-step stripping, so that the indicating light laser is protected from being damaged.
2. The high-power optical fiber laser indication optical protection device and the implementation method thereof provided by the invention can effectively dissipate the heat generated by stripping the reverse light, the heat generated by stripping the cladding light is dissipated by using the heat dissipation plate or the water cooling plate, and meanwhile, the heat generated by loss in the optical fiber winding mechanism can also be dissipated by the heat conducting glue and the heat dissipation plate in time.
3. According to the characteristics of different wavelengths of backward light and indicating light, the diameter of the used optical fiber winding mechanism, the selected optical fiber and the coiling length are theoretically calculated and experimentally verified, and the backward core light passing through the optical fiber can be converted into cladding light through the optical fiber winding mechanism without causing the attenuation of the indicating light intensity.
4. The high-power fiber laser indicating light protection device and the implementation method thereof provided by the invention are composed of two fiber winding mechanisms, two cladding light stripping mechanisms and fibers, a light path does not need to be adjusted by using a lens, and the system is simple and clear and is convenient to operate.
Drawings
FIG. 1 is an overall structural view of an indicating light protection device of the present invention;
FIG. 2 is a view showing the diameter of the winding mechanism of the light protection device according to the present invention in an extended state;
FIG. 3 is a view showing a state where the diameter of the winding mechanism of the light protection device of the present invention is reduced;
FIG. 4 is an external structure view of a winding mechanism of the indicating light protection device of the present invention;
FIG. 5 is a diagram of a cladding light stripper mechanism of an indicator light protection device of the present invention;
FIG. 6 is an enlarged view of the indicating light protection device of the present invention at A of FIG. 5;
FIG. 7 is a schematic diagram of the adjusting lever and the upper pinch roller of the indicating light protection device of the present invention;
fig. 8 is a diagram showing a state where core light and backward signal light of the path generating system of the present invention are transmitted through the core.
In the figure: 1. an indicator light laser; 2. an optical fiber winding mechanism; 21. a front support frame group; 22. a rear support frame set; 23. a winding side plate; 24. a rotating shaft; 25. a winding telescoping mechanism; 251. a main pipe; 252. a secondary pipe; 253. an arc plate; 254. a main ventilation pipe; 255. a vent branch; 3. a cladding light stripping mechanism; 31. peeling off the shell; 32. a through hole; 33. adjusting a rod; 34. an upper pinch roller; 341. a card slot; 35. a lower pinch roller; 36. heat dissipation holes; 4. an optical fiber line; 41. a fiber core; 42. and (7) cladding.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an indicating light protection device for a high-power fiber laser includes an indicating light laser 1, a fiber winding mechanism 2 and a cladding light stripping mechanism 3, where the indicating light laser 1 is an indicator with a tail fiber output, a fiber 4 connected to the indicating light laser 1 is connected to two groups of fiber winding mechanisms 2 and cladding light stripping mechanisms 3 in a staggered manner, the fiber 4 includes a fiber core 41 and a cladding 42, the cladding 42 is coated outside the fiber core 41, the fiber winding mechanism 2 is used to change the diameter of the coiled fiber, the bending angle of the fiber 4 is changed, the fiber core light in the fiber 4 enters the cladding 42 from the fiber core 41, the backward signal light in the high-power fiber laser is converted into cladding light, and the cladding light stripping mechanism 3 is used to strip the backward cladding light and the fiber light at the same time to protect the indicating light laser; and simultaneously, the light energy is indicated to be transmitted without loss, and the indicating function is provided for a high-power laser.
Referring to fig. 2-3, the optical fiber winding mechanism 2 includes a front support frame set 21, a rear support frame set 22, winding side plates 23, a rotating shaft 24 and a winding telescoping mechanism 25, the rotating shaft 24 with two protruding ends is inserted into the top end bearings of the front support frame set 21 and the rear support frame set 22, the front support frame set 21 and the rear support frame set 22 are used for supporting two ends of the rotating shaft 24 without affecting the rotation of the rotating shaft 24, two winding side plates 23 are fixed on the outer wall of the rotating shaft 24 between the front support frame set 21 and the rear support frame set 22, the diameter of the winding side plates 23 is larger than the outer diameter of the rotating shaft 24, so as to prevent the optical fiber 4 wound on the rotating shaft 24 from falling off, the winding telescoping mechanism 25 is fixed on the rotating shaft 24 between the two winding side plates 23, the optical fiber 4 is wound on the winding telescoping mechanism 25 and is telescoped by the diameter of the winding telescoping mechanism 25, the angle at which the optical fiber line 4 is bent is changed.
Referring to fig. 4, the winding telescoping mechanism 25 includes a main pipe 251, a sub-pipe 252, an arc plate 253, a main ventilating pipe 254 and branch ventilating pipes 255, the main pipe 251 is disposed at equal intervals around the circumference of the rotating shaft 24, the main pipe 251 is communicated with the inside of the rotating shaft 24, the rotating shaft 24 is disposed at the external ports of the front support frame group 21 and the rear support frame group 22, one end is closed, the other end is open, the movable branch ventilating pipes 255 are inserted into the openings of the two rotating shafts 24, the ports of the branch ventilating pipes 255 at both sides are connected with one end of the main ventilating pipe 254, the main ventilating pipe 254 is connected with an air pump, the generated air pressure can be flushed into the main ventilating pipe 254 under the action of the air pump, so that the air pressure of the main ventilating pipe 254 enters the branch ventilating pipes 255, the sub-pipe 252 is inserted into the main pipe 251, one end of the sub-pipe 252 is disposed in the main pipe 251, one end of the main ventilating pipe 254 is disposed outside the main pipe 251, the air introduced into the main pipe 251 and enters the main pipe 251 through the main ventilating pipe 255 and the rotating shaft 24 to act on the sub-pipe 252, after certain amount of gas is flushed into the rotating shaft 24 under the action of the air pressure, the main pipes 251 equally divide the gas, the auxiliary pipe 252 positioned at the upper half part balances the gravity of the main pipe 252 in a mode of adding a spring outside, the auxiliary pipe 252 moves up and down in the main pipe 251 under the action of the air pressure, the arc plates 253 are fixed outside the auxiliary pipe 252 and synchronously extend and retract with the auxiliary pipe 252, the arc plates 253 are contacted with each other to form a complete circular ring structure at the minimum stroke when the auxiliary pipe 252 retracts into the main pipe 251, and the diameter of the optical fiber 4 wound outside the arc plates 253 is minimum; in the maximum distance of the secondary pipe 252 extending out of the main pipe 251, a circular ring structure with equally spaced gaps is formed among the plurality of arc plates 253, the diameter of the optical fiber wire 4 wound outside the arc plates 253 is the maximum, and by changing the bending degree of the optical fiber wire 4, the incident angle of the backward signal light in the optical fiber wire 4 is changed, so that the originally totally reflected backward signal light is converted into a backward signal generating a certain refraction, and the refracted light enters the cladding 42 and is converted into cladding light.
Referring to fig. 5, the cladding light stripping mechanism 3 includes a stripping shell 31, a through hole 32, an adjusting rod 33, an upper pressure roller 34, a lower pressure roller 35 and heat dissipation holes 36, the through hole 32 is processed along the length direction of the stripping shell 31 and penetrates through the stripping shell 31, the heat dissipation holes 36 processed on the top end of the stripping shell 31 are communicated with the through hole 32, the adjusting rod 33 engaged with the front end of the stripping shell 31 extends to the through hole 32 and is movably connected with the upper pressure roller 34, two ends of the lower pressure roller 35 under the upper pressure roller 34 are movably connected with the stripping shell 31, the upper pressure roller 34 is driven by the adjusting rod 33 to move up and down to control the distance between the upper pressure roller 34 and the lower pressure roller 35, the distance between the upper pressure roller 34 and the lower pressure roller 35 is not smaller than the diameter of the optical fiber line 4, the distance formed between the upper pressure roller 34 and the lower pressure roller 35 for the optical fiber line 4 to penetrate through can be increased when the diameter of the optical fiber winding mechanism 2, the upper pressure roller 34 is moved up to reduce the pressure generated by the optical fiber line 4, let also increase diameter when optic fibre line 4 can follow the diameter increase of optic fibre mechanism 2, after the adjustment of optic fibre mechanism 2 diameter, will go up pinch roller 34 and move down, then go up pinch roller 34 cooperation and push down optic fibre line 4 under pinch roller 35, let optic fibre line 4 can not directly take place the contact with the through-hole 32 of peeling off shell 31 to avoid causing the damage to the border of optic fibre line 4.
The top of instruction light laser 1, optic fibre wire winding mechanism 2 and cladding light stripping off mechanism 3 all installs on heating panel or water-cooling board, and cladding light derivation and the heat that produces in cladding light stripping off mechanism 3 are via heating panel or water-cooling board dispel, and optic fibre wire winding mechanism 2 can in time dispel the heat that produces with reverse signal light loss through heating panel or water-cooling board.
Referring to fig. 6, a shaft penetrating through the center of the upper pressing wheel 34 is inserted into a sliding groove formed in the peeling shell 31 in the vertical direction, the shaft of the upper pressing wheel 34 slides up and down along the sliding groove, the sliding groove provides a guide for the up-and-down movement of the upper pressing wheel 34, the shaft penetrating through the center of the lower pressing wheel 35 is inserted into a bearing of the peeling shell 31, the position of the lower pressing wheel 35 is raised, and the lower pressing wheel 35 cannot move.
Referring to fig. 7, symmetrical slots 341 are formed in a center line of the upper pressing wheel 34, a rotating T-shaped rod is inserted into a bottom end surface of the adjusting rod 33, two ends of the T-shaped rod are inserted into the slots 341 to drive the upper pressing wheel 34 to ascend and descend, the upper pressing wheel 34 does not rotate synchronously with the adjusting rod 33, the adjusting rod 33 can move up and down by rotating the adjusting rod 33 and matching with a threaded structure of the adjusting rod 33, the T-shaped rod can be synchronously driven to move down when the adjusting rod 33 descends, the two ends of the T-shaped rod are inserted into the slots 341 and slide up and down along a sliding groove, the T-shaped rod rotates around the adjusting rod 33 during descending, the generated rotating power is offset, and the kinetic energy generated by rotation of the adjusting rod 33 is transmitted to the upper pressing wheel 34.
The cladding light stripping mechanism 3 in the device can also be a bare optical fiber with the surface subjected to texturing treatment, different texturing degrees are designed according to the efficiency of stripping step by step, a refraction glue layer with refractive index increasing gradually along the axial direction of the optical fiber is filled between the special-shaped optical fiber groove and the exposed section of the cladding 42, high-power cladding light can be uniformly stripped along the axial direction of the optical fiber, local high temperature caused by stripping heat accumulation is avoided, the maximum power of the cladding light capable of being stripped is improved, and the reverse signal light in the cladding 41 is led out in a homogenized manner.
Referring to fig. 8, in order to better show the process of indicating light protection, the embodiment now provides an implementation method of an indicating light protection device of a high-power fiber laser, including the following steps:
the method comprises the following steps: in an operating state, core light generated by the indicating light laser 1 is transmitted in the fiber core 41, the indicating light and the backward light emitted by the indicating light laser 1 have different wavelengths, and the angles generated by total reflection are different, when the angle of incident light passing through the fiber core reaches or exceeds a certain angle, the fiber core 41 is transmitted to a receiving end, part of the core light can be continuously reflected and retro-reflected to the indicating light laser 1 to generate backward fiber core light and cladding light, the wavelength of the light emitted by the indicating light laser 1 in the fiber core 41 is monochromatic light of visible light, the visible light wavelength includes but is not limited to 635nm, and the wavelength of the backward light is monochromatic light of 1.06 μm;
step two: the fiber core light and the cladding light enter the fiber wire 4 in the right fiber winding mechanism 2, the diameter of the right fiber winding mechanism 2 is obtained through theoretical calculation and experimental verification, the amount of gas introduced into the main gas pipe 254 is adjusted, so that a circular ring structure with gaps at equal intervals is formed among the arc plates 253, the bending angle of the fiber winding mechanism 4 is changed, the angle of the reflected light of the fiber winding mechanism is adjusted, the reflected light of the reflected light is smaller than a certain angle, refracted light is generated, and most of the fiber core light enters the cladding 42 from the fiber core 41;
step three: when the fiber passes through the right cladding light stripping mechanism 3, the backward signal light of the cladding 42 is uniformly guided out, at the moment, part of the backward signal light still remains in the fiber core 41 and continues to pass through the fiber winding mechanism 2 on the left, and the rest of the backward signal light enters the cladding 42 from the fiber core 41 in the same way;
step four: and finally, when the fiber passes through the left cladding light stripping mechanism 3, the backward signal light of the cladding 42 is uniformly guided out, at the moment, most backward signals enter the cladding 42, and the 4-backward signal light is stripped from the optical fiber 4 through the cladding light stripping mechanism.
In summary, the following steps: the high-power fiber laser indicating light protection device and the implementation method can effectively strip reverse fiber core light and cladding light in the high-power fiber laser, and the fiber core light is converted into the cladding light through the fiber winding mechanism 2; after the cladding light stripping mechanisms 3 are respectively stripped twice step by step, the reverse fiber core light and the cladding light of the high-power optical fiber laser can be effectively stripped, and the indicating light laser 1 is protected from being damaged.
The heat generated by stripping the backward light is effectively dissipated, the heat generated by stripping the cladding light is dissipated by using a heat dissipation plate or a water cooling plate, and meanwhile, the heat generated by loss in the optical fiber 4 in the optical fiber winding mechanism 2 can be dissipated by the heat conduction glue and the heat dissipation plate in time.
According to the characteristics of different wavelengths of the reverse light and the indicating light, the diameter of the used optical fiber winding mechanism 2, the selected optical fiber and the winding length are theoretically calculated and experimentally verified, the reverse core light passing through the optical fiber wire 4 can be converted into cladding light through the optical fiber winding mechanism 2, and the attenuation of the indicating light intensity cannot be caused;
the device consists of two optical fiber winding mechanisms 2, two cladding light stripping mechanisms 3 and optical fibers 4, a light path is not required to be adjusted by using a lens, and the system is simple and clear and is convenient to operate.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (9)
1. The high-power optical fiber laser indicating light protection device is characterized by comprising an indicating light laser (1), an optical fiber winding mechanism (2) and a cladding light stripping mechanism (3), wherein an optical fiber (4) connected to the indicating light laser (1) sequentially passes through the left cladding light stripping mechanism (3), the left optical fiber winding mechanism (2), the right cladding light stripping mechanism (3) and the right optical fiber winding mechanism (2), the optical fiber (4) comprises a fiber core (41) and a cladding (42), the cladding (42) is coated outside the fiber core (41), the optical fiber winding mechanism (2) is used for changing the coiling diameter of the optical fiber and the bending angle of the optical fiber (4) is changed, and the fiber core light in the optical fiber (4) enters the cladding (42) from the fiber core (41);
cladding light peeling means (3) are including peeling off shell (31), through-hole (32), adjust pole (33), go up pinch roller (34), pinch roller (35) and louvre (36) down, length direction processing along peeling off shell (31) is followed in through-hole (32), and run through peeling off shell (31), louvre (36) and through-hole (32) intercommunication of processing on the top of peeling off shell (31), peel off shell (31) front end meshing adjust pole (33) extend to through-hole (32) and with last pinch roller (34) swing joint, pinch roller (35) both ends down under going up pinch roller (34) and peeling off shell (31) swing joint, it reciprocates to drive pinch roller (34) through adjusting pole (33), control and the interval between pinch roller (35) down, it does not less than the diameter of optic fibre (4) to form the interval between pinch roller (34) and the pinch roller (35) down.
2. The high-power optical fiber laser indication optical protection device according to claim 1, wherein the optical fiber winding mechanism (2) comprises a front support frame set (21), a rear support frame set (22), winding side plates (23), a rotating shaft (24) and a winding telescoping mechanism (25), the rotating shaft (24) with two protruding ends is inserted into top end bearings of the front support frame set (21) and the rear support frame set (22), the two winding side plates (23) are fixed on the outer wall of the rotating shaft (24) between the front support frame set (21) and the rear support frame set (22), the winding telescoping mechanism (25) is fixed on the rotating shaft (24) between the two winding side plates (23), the optical fiber (4) is wound on the winding telescoping mechanism (25) and is stretched through the diameter of the winding telescoping mechanism (25), and the bending angle of the optical fiber (4) is changed.
3. The high-power optical fiber laser indication optical protection device according to claim 2, wherein the top ends of the indication optical laser (1), the optical fiber winding mechanism (2) and the cladding light stripping mechanism (3) are all mounted on a heat dissipation plate or a water cooling plate, heat generated by guiding out cladding light in the cladding light stripping mechanism (3) is dissipated through the heat dissipation plate or the water cooling plate, and heat generated by reverse signal light loss is dissipated in time by the optical fiber winding mechanism (2) through the heat dissipation plate or the heat conductive glue.
4. The high-power fiber laser indication optical protection device according to claim 3, wherein the winding expansion mechanism (25) comprises a main pipe (251), a secondary pipe (252), an arc plate (253), a main ventilation pipe (254) and branch ventilation pipes (255), the main pipe (251) is disposed around the circumference of the rotation shaft (24) at equal intervals, the main pipe (251) is communicated with the inside of the rotation shaft (24), the rotation shaft (24) is located at the outer ports of the front support frame set (21) and the rear support frame set (22), one end is closed, the other end is open, the movable branch ventilation pipes (255) are inserted into the openings of the two rotation shafts (24), the ports of the branch ventilation pipes (255) at both sides are connected with one end of the main ventilation pipe (254), the secondary pipe (252) is inserted into the main pipe (251), the gas introduced into the main ventilation pipe (254) enters the main pipe (251) through the branch ventilation pipes (255) and the rotation shaft (24) and acts on the secondary pipe (252), the auxiliary pipe (252) moves up and down in the main pipe (251) under the action of air pressure, and the arc plate (253) is fixed outside the auxiliary pipe (252) and synchronously extends and retracts with the auxiliary pipe (252).
5. The high-power fiber laser indication light protection device as claimed in claim 4, wherein a shaft penetrating through the center of the upper pressing wheel (34) is inserted into a chute processed in the vertical direction of the peeling shell (31), the shaft of the upper pressing wheel (34) slides up and down along the chute, and a shaft penetrating through the center of the lower pressing wheel (35) is inserted into a bearing of the peeling shell (31).
6. The high-power fiber laser indication light protection device as claimed in claim 5, wherein symmetrical slots (341) are formed on the center line of the upper pressure wheel (34), the bottom end surface of the adjusting rod (33) is inserted into a rotating T-shaped rod, two ends of the T-shaped rod are inserted into the slots (341) for driving the upper pressure wheel (34) to lift, and the upper pressure wheel (34) does not rotate synchronously with the adjusting rod (33).
7. The high-power fiber laser indicator light protection device of claim 6, wherein, at the minimum stroke of the secondary tube (252) retracting into the main tube (251), a plurality of arc plates (253) are contacted with each other to form a complete circular ring structure, and the diameter of the optical fiber (4) wound outside the arc plates (253) is minimum; and in the maximum stroke of the auxiliary pipe (252) extending out of the main pipe (251), a circular ring structure with notches at equal intervals is formed among the arc plates (253), and the diameter of the optical fiber (4) wound outside the arc plates (253) is the maximum.
8. An implementation method of the high-power fiber laser indication optical protection device according to claim 7, characterized by comprising the following steps:
s1: in a working state, part of fiber core light and cladding light in the high-power fiber laser are reflected to the indicating light laser (1), if the part of light is not stripped in time, the indicating light laser is irreversibly damaged, and the indicating light laser (1) cannot work normally in severe cases;
s2: the reflected fiber core light and the cladding light enter the optical fiber (4) in the right optical fiber winding mechanism (2), the diameter of the right optical fiber winding mechanism (2) is obtained through theoretical calculation and experimental verification, the amount of gas introduced into the main ventilation pipe (254) is adjusted, so that a circular ring structure with equally spaced gaps formed among the arc plates (253) is adjusted, the angle of the reflected light of the optical fiber (4) wound on the optical fiber winding mechanism (2) is adjusted by changing the bending angle of the optical fiber (4), the reflected light of the reflected light is smaller than a certain angle, refracted light is generated, and most of the fiber core light of S1 enters the cladding (42) through the fiber core (41);
s3: when the fiber passes through the right cladding light stripping mechanism (3), the light in the cladding (42) is uniformly guided out, at the moment, part of the core light still remains in the fiber core (41) and continues to pass through the fiber winding mechanism (2) on the left, and the rest of the core light enters the cladding (42) from the fiber core (41) in the same way;
s4: and finally, when the fiber passes through the left cladding light stripping mechanism (3), the core light of the S2 remained in the core (41) of the cladding (42) is uniformly guided out, at the moment, most of the core light enters the cladding (42), and the core light and the cladding light are stripped from the optical fiber (4) through the cladding light stripping mechanism (3).
9. The method for implementing the high power fiber laser indicator light protection device according to claim 8, wherein, for step S1, the characteristics of the indicator light emitted by the indicator light laser (1) and the wavelengths of the partial core light and the cladding light are different, and the proper fiber type, length and winding radius are designed through theoretical calculation and experimental verification, so that the indicator light can be transmitted through the core of the indicator light protection device without loss while the backward light of the fiber laser is stripped.
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