CN117526067A - Cladding light filtering structure of three-cladding optical fiber and manufacturing method - Google Patents
Cladding light filtering structure of three-cladding optical fiber and manufacturing method Download PDFInfo
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- CN117526067A CN117526067A CN202311642922.8A CN202311642922A CN117526067A CN 117526067 A CN117526067 A CN 117526067A CN 202311642922 A CN202311642922 A CN 202311642922A CN 117526067 A CN117526067 A CN 117526067A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 131
- 238000005253 cladding Methods 0.000 title claims abstract description 72
- 238000001914 filtration Methods 0.000 title claims abstract description 61
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000000835 fiber Substances 0.000 claims abstract description 48
- 238000005452 bending Methods 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000005530 etching Methods 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 5
- 235000012239 silicon dioxide Nutrition 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
- 239000004519 grease Substances 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06729—Peculiar transverse fibre profile
- H01S3/06733—Fibre having more than one cladding
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06704—Housings; Packages
Abstract
The utility model provides a cladding light filtering structure and preparation method of three-clad optical fiber, includes upper cover and optic fibre base, the base contain leading stray light filtering structure, disturbing mode structure, rearmounted stray light filtering structure, disturbing mode structure have jump breach, be located the middle part of optic fibre base, twine around disturbing mode optic fibre in the wire casing of disturbing mode structure, leading stray light filtering structure one end with disturbing mode optic fibre one end of disturbing mode structure inner circle link to each other and fix on the optic fibre base, the optic fibre of the other end stretch out optic fibre base front edge, rearmounted stray light filtering structure one end with disturbing mode optic fibre of disturbing mode structure outer lane link to each other and fix on the optic fibre base, the optic fibre of the other end stretch out the rear of optic fibre base, the upper cover and fix on the optic fibre base. The invention has the advantages of simple structure and good filtering effect, ensures the mechanical property of the optical fiber and simultaneously realizes the controllability of the quality of the output light beam.
Description
The invention relates to a cladding light filtering structure and a manufacturing method of a three-cladding optical fiber, which are filed in 2022, 1 and 21, and are divided into patent application of application number 202210073128.5.
Technical Field
The invention belongs to the technical field of laser, and particularly relates to a cladding light filtering structure of a three-cladding optical fiber and a preparation method thereof.
Background
With the development of laser technology, the output power of the fiber laser is continuously improved, the pressure of various devices on the fiber link is correspondingly increased, the heat generated by the absorption of the fiber coating layer can be effectively reduced by filtering unnecessary cladding light, the stray light with a large divergence angle after the laser space is output is reduced, and the reliability of the whole laser link is improved. In addition, during normal operation or application processing of the laser, part of the laser is reflected back along the original path to act on the core device in the laser, and when the intensity of the returned light reaches a certain threshold value, the operation of the device in the laser is unstable or is irreversibly damaged.
In order to reduce the loss, the energy-transmitting optical fiber of the high-power fiber laser generally adopts a three-cladding structure, wherein the fiber core and the outer cladding are pure silicon dioxide layers, and the inner cladding is a fluorine-doped low-refractive index layer. The ideal energy-transfer fiber refractive index profile is a complete "step" and the refractive index profile of the low refractive index layer should also be quite flat. However, in practical use, such optical fibers are due to MCVD or PCVD multilayer deposition processes employed in optical fiber fabrication. This process results in an inner cladding fluorine-doped layer with a refractive index profile that is non-uniformly radially and axially distributed, which causes some large divergence angle "stray light" (typically comprising signal light and unabsorbed pump laser light) in the core transmission to enter the fluorine-doped layer and not further into the outer cladding layer, where such "stray light" is transmitted directly. The current cladding mode filtering scheme basically leads out the outer cladding light by roughening or coating a high refractive index material on the surface of the optical fiber, so that the stray light of the outer cladding can only be filtered out, and the stray light transmitted by the fluorine-doped inner cladding can not be removed. Such as BD-S100/120/360-STN, BD-S150/170/360-STN, BD-S200/230/660-STN, BD-S600/660/720-STN, etc. of Nufern. In the optical fiber with the structure, the ratio of the fiber core to the outer diameter is small, the thickness of the fluorine doped layer is thin, and if the technical scheme commonly used in the industry is continuously adopted, the whole optical fiber needs to be subjected to cladding light treatment after the outer cladding layer is removed by a physical or chemical method, and the inner fluorine doped cladding layer is exposed. There are several problems with such a process: first, the outer cladding of the fiber is typically thick, difficult to remove, and too slow to perform. Second, since the inner cladding is thin, the removal process easily breaks the waveguide structure of the inner cladding. Finally, the diameter of the treated optical fiber is very small, and the surface of the optical fiber is left with microcracks in the treatment process, so that the mechanical performance of the optical fiber is obviously reduced, and a certain risk is caused in actual use.
Disclosure of Invention
In order to solve the problems, the invention provides a cladding light filtering structure of a three-cladding optical fiber and a preparation method thereof, wherein the light filtering structure has the advantages of simple structure and good filtering effect, and can realize the controllability of the quality of an output light beam while ensuring the mechanical property of the optical fiber.
The technical scheme of the invention is as follows:
the utility model provides a cladding light filtering structure of three-layer optic fibre, its characteristics lie in and contain upper cover and optic fibre base, the base contain leading stray light filtering structure, disturbing mode structure, rearmounted stray light filtering structure, disturbing mode structure have jump breach, be located the middle part of optic fibre base, twine around disturbing mode optic fibre in the wire casing of disturbing mode structure, leading stray light filtering structure one end with disturbing mode optic fibre one end of disturbing mode structure inner circle link to each other and fix on the optic fibre base, the optic fibre of the other end stretch out optic fibre base front edge, rearmounted stray light filtering structure one end with disturbing mode optic fibre of disturbing mode structure outer lane link to each other and fix on the optic fibre base, the optic fibre of the other end stretch out the rear of optic fibre base, the upper cover and fix on the optic fibre base.
The fiber core and the outer cladding of the three-cladding fiber are pure silicon dioxide layers, the inner cladding is a fluorine-doped low refractive index layer, and the numerical aperture is NA0.12-0.24.
The optical fiber base is a semicircular long shell with a certain diameter, and the diameter range of the section of the optical fiber base is as follows: 1-8 cm; the angle range of the bending surface is as follows: 90-180 degrees, the optical fiber base or the wave structure formed by combining a plurality of sections of curved surfaces.
The manufacturing method of the cladding light filtering structure of the three-cladding optical fiber comprises the following steps:
1) Treating the outer cladding of the optical fiber by adopting chemical corrosion, laser or mechanical etching and other modes, wherein the treatment range comprises physical size and surface structure, and hermetically packaging the treatment part by using a capillary;
2) Performing software simulation calculation according to the actual refractive index distribution of the fluorine-doped layer and the light beam quality test result input by the input end so as to calculate the result, and selecting the diameter of the optical fiber disturbance mode of the disturbance mode structure and the number of turns of the optical fiber coil;
3) Adopting mechanical stress to bend a piece of metal into a three-dimensional disturbing mode structure or a semicircular long shell with a certain diameter, etching a circular or square U-shaped wire slot on the surface of the metal, coiling the treated optical fiber through the U-shaped wire slot, wherein the optical fiber coiling can realize the adjustable optical fiber coiling diameter through a jump notch: 1.3-10 cm, the number of coils of the optical fiber coil is selectable: 2-15 circles of the heat conducting silicone grease is used for paving and fixing,
4) The upper cover is provided with a surface heat dissipation grille;
5) Determining the positions of the front stray light filtering structure and the rear stray light filtering structure according to the simulation calculation result in the step 1);
6) Connecting the front stray light filtering structure with one end of an optical fiber of an inner ring of the disturbing mode structure, installing and fixing the front stray light filtering structure on the optical fiber base, enabling the optical fiber at the other end to extend out of the front edge of the optical fiber base, connecting one end of the rear stray light filtering structure with one end of an optical fiber at the outer ring of the disturbing mode structure, fixing the optical fiber on the optical fiber base, and enabling the optical fiber at the other end to extend out of the rear edge of the optical fiber base;
7) And covering the upper cover on the optical fiber base and fixing the upper cover by using screws.
The invention has the following technical effects:
the outer cladding of the optical fiber is treated by adopting chemical corrosion, laser or mechanical etching and the like, the treatment range comprises physical dimensions and surface structures, and the capillary tube is used for sealing and packaging the treatment part: filtering stray light with large divergence angles before and after mode disturbance; the large divergence angle 'stray light' mainly comprises forward transmission stray light and backward reflected light of the laser equipment;
the mechanical stress bending three-dimensional disturbing mode structure or the space circular body (fixed diameter) coiling is adopted, and the bending strength of the optical fiber coiling is controlled through the precise fiber winding mechanism, so that the macrobending of the optical fiber is caused. This can significantly increase the coupling between modes and the coupling of "stray light" of large divergence angle to the radiation mode, further improving the filtering efficiency of stray light.
The upper cover structure has the functions of fixing the optical fiber and radiating heat on the surface;
the base structure is coiled to optic fibre: cross-sectional diameter range: 1-8 cm; angle range of curved surface: 90-180 degrees; the wave structure can be formed by combining a plurality of sections of curved surfaces;
the structural function is as follows: the high-power heat dissipation requirement can be realized through water cooling of the solid base;
all the structures are manufactured or installed on the optical fiber coiling base, and finally the invention is formed.
5. Three-clad fiber structure description:
the fiber core A and the outer cladding C are pure silicon dioxide layers, the inner cladding B is a fluorine-doped low refractive index layer, and the range of numerical aperture NA is as follows: 0.12-0.24.
According to the invention, the triple-clad optical fiber macrobend is caused by external force coiling, so that the coupling between modes and the coupling from 'stray light' with a large divergence angle to a radiation mode are increased, and the radiation mode is transmitted from a fiber core into a cladding and is filtered by a rear stray light filtering mechanism.
Technical effects of the invention
1. Realizing the efficient filtering of the cladding light of the bidirectional stability of the three-cladding optical fiber;
2. the output energy distribution of the three-cladding fiber laser and the adjustable beam quality are realized;
3. high-power filtering and stable heat dissipation of cladding light of the three-cladding optical fiber are realized;
drawings
FIG. 1 is a schematic diagram of the overall structure of a cladding light filtering structure of a three-clad optical fiber according to the present invention;
FIG. 2 is a schematic view of the structure of a fiber optic disc disturbing mode base 2 according to the present invention;
FIG. 3 is a left side view of the present invention;
FIG. 4 is a refractive index profile of a three-clad fiber according to the present invention;
FIG. 5 is a refractive index test profile of a tri-clad fiber according to the present invention;
Detailed Description
The invention is further illustrated in the following examples and figures, which should not be taken to limit the scope of the invention.
Referring to fig. 1, 2 and 3, it can be seen that the cladding light filtering structure of the three-cladding optical fiber of the present invention comprises an upper cover 1 and an optical fiber base 2, the base 2 comprises a front stray light filtering structure 2.1, a mode disturbing structure 2.2 and a rear stray light filtering structure 2.3, the mode disturbing structure 2.2 has a jump notch 2.21 and is located in the middle of the optical fiber base 2, a mode disturbing optical fiber is wound in a wire slot of the mode disturbing structure 2.2, one end of the front stray light filtering structure 2.1 is connected with one end of a mode disturbing optical fiber of an inner ring of the mode disturbing structure 2.2 and is fixed on the optical fiber base 2, an optical fiber of the other end extends out of the front side of the optical fiber base 2, one end of the rear stray light filtering structure 2.3 is connected with one end of a mode disturbing structure 2.2 outer ring and is fixed on the optical fiber base 2, an optical fiber of the other end extends out of the rear side of the optical fiber base 2, and the upper cover 1 covers and is fixed on the optical fiber base 2.
The manufacturing method of the cladding light filtering structure of the three-cladding optical fiber comprises the following steps:
1) Treating the outer cladding of the optical fiber by adopting chemical corrosion, laser or mechanical etching and other modes, wherein the treatment range comprises physical size and surface structure, and hermetically packaging the treatment part by using a capillary;
2) Performing software simulation calculation according to the actual refractive index distribution of the fluorine-doped layer and the light beam quality test result input by the input end, so as to select the diameter of the optical fiber disturbing mode of the disturbing mode structure 2.2 and the number of turns of optical fiber coiling according to the calculation result;
3) Adopting mechanical stress to bend a piece of metal into a three-dimensional disturbing mode structure or a semicircular long shell with a certain diameter, etching a circular or square U-shaped wire slot on the surface of the metal, coiling the treated optical fiber through the U-shaped wire slot, wherein the optical fiber coiling can realize the adjustment of the optical fiber coiling diameter through a jump notch 2.21: 1.3-10 cm, the number of coils of the optical fiber coil is selectable: 2-15 circles of heat-conducting silicone grease is used for paving and fixing, and a surface heat-dissipating grid is manufactured on the upper cover 1;
4) The upper cover is provided with a surface heat dissipation grille;
5) Determining the positions of the front stray light filtering structure 2.1 and the rear stray light filtering structure 2.3 according to the simulation calculation result of the step 1);
6) Connecting one end of the optical fiber of the inner ring of the front stray light filtering structure 2.1 with one end of the optical fiber of the outer ring of the disturbing mode structure 2.2, installing and fixing the optical fiber on the optical fiber base 2, extending the optical fiber at the other end out of the front edge of the optical fiber base 2, connecting one end of the rear stray light filtering structure 2.3 with one end of the optical fiber of the outer ring of the disturbing mode structure 2.2, fixing the optical fiber on the optical fiber base 2, and extending the optical fiber at the other end out of the rear edge of the optical fiber base 2;
7) The upper cover 1 is covered on the optical fiber base 2 and fixed by using screws.
Referring to fig. 3 and 4, fig. 4 shows refractive index design distribution of a three-clad optical fiber according to the present invention; FIG. 5 is a refractive index test profile of a tri-clad fiber according to the present invention. Experiments show that the invention has the characteristics of simple structure and good filtering effect, ensures the mechanical property of the optical fiber and realizes the controllability of the quality of the output light beam.
Claims (10)
1. The inner cladding light filtering structure of the multi-cladding optical fiber is characterized by comprising an upper cover (1) and an optical fiber base (2), wherein the optical fiber base (2) comprises a front stray light filtering structure (2.1), a mode disturbing structure (2.2) and a rear stray light filtering structure (2.3), the mode disturbing optical fiber is coiled in a wire slot of the mode disturbing structure (2.2), the mode disturbing optical fiber is the multi-cladding optical fiber, the multi-cladding optical fiber comprises a fiber core, an inner cladding and an outer cladding, one end of the front stray light filtering structure (2.1) is connected with one end of the mode disturbing optical fiber and is fixed on the optical fiber base (2), one end of the rear stray light filtering structure (2.3) is connected with the other end of the mode disturbing optical fiber and is fixed on the optical fiber base (2), and the upper cover (1) is covered on the mode disturbing optical fiber and is fixed;
the optical fiber base (2) is made of a heat-conducting material, is bent into a three-dimensional mode disturbing structure through mechanical stress, and causes macrobending of the mode disturbing optical fiber by controlling bending strength of the optical fiber coil so as to guide stray light transmitted in the inner cladding into the outer cladding.
2. The structure of claim 1, wherein the core (a) and the outer cladding (C) of the multi-clad fiber are pure silica layers, the inner cladding (B) is a fluorine-doped low refractive index layer, and the NA of the numerical aperture is in the range of 0.12-0.24.
3. The inner cladding light filtering structure of a multi-clad optical fiber according to claim 1 or 2, wherein the optical fiber base (2) is a semicircular long housing with a certain diameter by mechanical stress bending, and the variable range of the section diameter of the optical fiber base (2) is: 1-8 cm; the angle variable range of the bending surface is as follows: 90-180 degrees or the optical fiber base (2) forms a wave structure combined by a plurality of sections of curved surfaces.
4. The inner cladding light filtering structure of a multi-clad optical fiber according to claim 1 or 2, wherein the mode disturbing structure (2.2) has a jump notch (2.21) located in the middle of the optical fiber base (2).
5. The inner cladding light filtering structure of multi-clad optical fiber according to claim 4, wherein the optical fiber winding through the jump notch (2.21) achieves an adjustable range of optical fiber winding diameters: 1.3-10 cm, the coil number of the optical fiber coil can be selected in the following range: and 2-15 circles of the wire grooves are paved and fixed in the wire grooves by using heat-conducting silicone grease.
6. The manufacturing method of the inner cladding light filtering structure of the multi-cladding optical fiber is characterized by comprising the following steps:
1) Processing the outer cladding of the optical fiber by adopting etching and other modes, and hermetically packaging the processing part by using a capillary;
2) The inner cladding is a fluorine-doped layer, software simulation calculation is carried out according to the actual refractive index distribution of the fluorine-doped layer and the light beam quality test result input by the input end, so as to select the diameter of the mode-disturbing optical fiber of the mode-disturbing structure (2.2) and the number of turns of the optical fiber coil according to the calculation result;
3) Bending a piece of heat conducting material into a three-dimensional optical fiber base (2) by adopting mechanical stress, etching a wire slot on the surface of the heat conducting material, coiling the processed optical fiber through the wire slot, and controlling the bending strength of the coiling of the optical fiber to cause macrobending of the optical fiber so as to guide stray light transmitted in an inner cladding into an outer cladding by the three-dimensional optical fiber base bent by the mechanical stress;
4) Manufacturing a surface heat radiation grille on the upper cover;
5) Determining the positions of the front stray light filtering structure (2.1) and the rear stray light filtering structure (2.3) according to the simulation calculation result of the step 2);
6) Connecting the front stray light filtering structure (2.1) with one end of an optical fiber of the mode disturbing structure (2.2) and installing and fixing the front stray light filtering structure on the optical fiber base (2), and connecting one end of the rear stray light filtering structure (2.3) with the other end of the optical fiber of the mode disturbing structure (2.2) and fixing the rear stray light filtering structure on the optical fiber base (2);
7) And covering the upper cover (1) on the optical fiber base (2) and fixing the optical fiber base.
7. The method of claim 6, wherein the core (A) and the outer cladding (C) of the multi-clad fiber are pure silica layers, and the numerical aperture NA is in the range of 0.12-0.24.
8. The method for manufacturing the inner cladding light filtering structure of the multi-clad optical fiber according to claim 6 or 7, wherein the optical fiber base (2) is a semicircular long shell with a certain diameter by bending under mechanical stress, and the variable range of the section diameter of the optical fiber base (2) is: 1-8 cm; the angle variable range of the bending surface is as follows: 90-180 degrees or the optical fiber base (2) forms a wave structure combined by a plurality of sections of curved surfaces.
9. The inner cladding light filtering structure of multi-clad optical fiber according to claim 6 or 7, wherein the mode disturbing structure (2.2) has a jump notch (2.21) located in the middle of the optical fiber base (2).
10. The method for manufacturing the inner cladding light filtering structure of the multi-clad optical fiber according to claim 9, wherein the optical fiber coiling is realized by the jump notch (2.21) in an adjustable range of the optical fiber coiling diameter: 1.3-10 cm, the coil number of the optical fiber coil can be selected in the following range: and 2-15 circles of the wire grooves are paved and fixed in the wire grooves by using heat-conducting silicone grease.
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| CN202311642922.8A CN117526067A (en) | 2022-01-21 | 2022-01-21 | Cladding light filtering structure of three-cladding optical fiber and manufacturing method |
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| CN202311642922.8A CN117526067A (en) | 2022-01-21 | 2022-01-21 | Cladding light filtering structure of three-cladding optical fiber and manufacturing method |
| CN202210073128.5A CN114400493B (en) | 2022-01-21 | 2022-01-21 | Cladding light filtering structure of three-cladding optical fiber and manufacturing method |
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| CN113126222B (en) * | 2021-03-11 | 2022-11-22 | 武汉锐科光纤激光技术股份有限公司 | Method for coiling fibers by using non-complete orbit constraint type optical fiber disk |
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