CN118688914B - A precision pluggable high-power optical fiber coupling collimation device and method for engineering applications - Google Patents
A precision pluggable high-power optical fiber coupling collimation device and method for engineering applications Download PDFInfo
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- CN118688914B CN118688914B CN202410916567.7A CN202410916567A CN118688914B CN 118688914 B CN118688914 B CN 118688914B CN 202410916567 A CN202410916567 A CN 202410916567A CN 118688914 B CN118688914 B CN 118688914B
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- 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
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
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- 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
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
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- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
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- 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
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4251—Sealed packages
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
一种工程应用的可精密插拔高功率光纤耦合准直装置及方法,光纤端帽玻璃体与端帽法兰周向焊接固定，端帽尾端与输出光纤熔融连接，测试后通过法兰垫片修正焦距后与定位插拔件固定，构成光纤端帽输出头；定位插拔件前期与准直壳体进行锥孔配对组合加工，通过一组定位锥销安装到准直壳体前端；后端依次集成调整垫片和准直镜组件。光纤端帽输出头通过定位插拔件的轴孔配合以及锥销组定位，具有复位精度高、结构简单、操作方便，稳定性好的优点。本发明提供的高功率光纤耦合准直装置中光轴、光瞳的高精度复位解决方案，提高了光纤端帽输出头的互换性与适应性，实现了高功率光纤激光器及合成装置模块化分离设计，插拔复位后得到近衍射极限光束质量输出。
A precision pluggable high-power fiber coupling collimation device and method for engineering applications, wherein the fiber end cap glass body is circumferentially welded and fixed to the end cap flange, the end cap tail end is fused and connected to the output fiber, and after testing, the focal length is corrected by the flange gasket and then fixed to the positioning plug-in component to form a fiber end cap output head; the positioning plug-in component is preliminarily processed with the collimation housing for tapered hole pairing and assembly, and is installed to the front end of the collimation housing through a group of positioning tapered pins; the rear end is sequentially integrated with the adjustment gasket and the collimation lens assembly. The fiber end cap output head is positioned by the axial hole matching of the positioning plug-in component and the tapered pin group, and has the advantages of high reset accuracy, simple structure, convenient operation, and good stability. The high-precision reset solution for the optical axis and pupil in the high-power fiber coupling collimation device provided by the present invention improves the interchangeability and adaptability of the fiber end cap output head, realizes the modular separation design of the high-power fiber laser and the synthesis device, and obtains a near-diffraction-limited beam quality output after plug-in reset.
Description
Technical Field
The invention belongs to the technical field of high-power fiber lasers, in particular to the field of high-power fiber lasers and high-power laser synthesis, relates to a high-power fiber coupling connection technology, and particularly relates to a repeated positioning method with high requirements on near-field pupil and far-field optical axis superposition accuracy of laser output light spots.
Background
When the high-power fiber laser outputs laser by using the high-power energy-transmitting fiber, the energy-transmitting fiber core is small in diameter and high in optical power density, and when the end face of the fiber is polluted, the quality of a section is poor or the material is defective, the energy at the local position of the section can be concentrated, so that the end face of the fiber is damaged. And the return light of the end face of the optical fiber has a large influence on local temperature rise, and the product performance is directly influenced. The safety of the energy-transmitting optical fiber is also a key to limit the reliability of the laser. The optical fiber end cap and the energy-transmitting optical fiber are used for fusion welding, so that light spots can be enlarged, the optical power density of an output end can be reduced, and the reliability can be improved.
When the high-power fiber laser is used for improving the output energy, after the fiber coupling collimation device and the rear-stage synthetic optical path are assembled and adjusted, in order to obtain the beam quality output light spot with the near diffraction limit, the traditional method is generally that the fiber coupling collimation device and the rear-stage optical path are not separated after the relative positions are fixed, and are connected in a single integrated site in a fiber welding mode, and the site treatment, encapsulation and protection of the external melting point of the high-power fiber become a key factor for improving the power of the high-power laser, and the method has high pollution prevention requirement on site environment, is complex to operate, has low fault tolerance and is difficult to ensure reliability;
In prior art 1, the invention name of prior art 1 is a high-power output optical fiber coupling device, and the patent number CN109001872B uses a single convex lens coupling mode, so that the coupling efficiency can be ensured by considering that the Fresnel reflection is less on the optical surface, but the spherical aberration influence of an optical system cannot be avoided, and the beam quality of output laser is poor. And the coupling plug adopts a single conical surface positioning mode, the positioning accuracy is limited by the conical surface matching influence of actual processing, the difference of the coaxiality of the optical axis of the optical fiber end cap and the coupling plug on mutual coupling cannot be corrected, and the beam quality near the diffraction limit is difficult to obtain.
In the prior art 2, the invention is named as an optical fiber end cap with a collimation function and a preparation method thereof, publication number CN114153031 discloses and in the prior art 3, a manufacturing method of a high-power optical fiber end cap is disclosed, and publication number CN114153031 authorizes. The invention considers that the convex area of the spherical lens is designed on the end cap of the optical fiber to pre-collimate the optical fiber beam, the spherical aberration of the collimation of the single lens is larger, the quality of the optical beam cannot be ensured, when the power of the single optical fiber is larger, the return power is converged at the focus, the temperature rise of the end cap is higher, the reliability of the product is affected, the diameter of the collimated transmission beam is relatively smaller, when the power of the laser at the later stage needs to be expanded, the local power density irradiated to the surface of the lens group is larger, the thermal effect of the reflecting lens is aggravated, and the quality of the optical beam of the subsequent optical path is affected. The invention adopts the integrated design of the single-column convex collimating lens and the optical fiber end cap, has poor effect of suppressing the back stray light return and eliminating the spherical aberration, and is limited in the application of higher-power laser.
Disclosure of Invention
In order to solve the technical and engineering application problems, the invention provides a high-power optical fiber coupling collimation device capable of being precisely inserted and extracted and a method thereof, which are convenient to operate, safe and reliable, and are used for carrying out beam expansion and collimation on a laser output optical fiber spot, controlling coarse and precise positioning precision and focal length compensation between a positioning plug and a collimation shell, realizing high-precision repeated positioning and focal length compensation of near-field pupils and far-field optical axes of different end cap assemblies, outputting near-diffraction limit light beams, and the method has the advantages of convenience in operation, safety, reliability, high resetting precision, good light beam quality, good stability and the like.
The technical scheme of the invention is as follows:
The utility model provides a but high-power fiber coupling collimation device of precision plug that engineering was used, including laser instrument output optic fibre (1), optic fibre armor (2), protection tail sleeve (3), tail cap (4), end cap tailstock (5), optic fibre end cap (6), end cap flange (7), flange gasket (8), preceding stage sealing washer (9), location plug (10), location taper pin (11), back level sealing washer (12), collimation casing (13), compensation gasket (14), collimation lens seat (15), collimation lens a (16), lens spacer ring (17), collimation lens b (18), collimation clamping ring (19), radial seal circle (20).
The optical fiber end cap glass body is fixed with an end cap flange, the tail end of the optical fiber end cap is in fusion connection with an output optical fiber, an optical fiber armor (2), a protective tail sleeve (3), a tail cover (4) and an end cap tail frame (5) are sequentially integrated by using end cap integration special equipment to ensure strict centering in the integration process, and then a standard component is glued and fixed with force to obtain end cap components;
The optical fiber end cap output head end face is provided with a rear-stage sealing ring (12), the optical fiber end cap output head and the rear-stage sealing ring (12) are connected with the front end of a collimation shell (13) through a group of positioning (5) taper pins, a collimation lens a (16), a lens space ring (17) and a collimation lens b (18) are designed to be tightly pressed through a collimation pressing ring (19) and circumferentially fixed to form a collimation lens assembly, the collimation lens assemblies are tested through a reference end cap in a focal length screening device and matched with the thickness of a proper compensation gasket (14), and a sealing ring (20) is arranged at the radial position of the collimation lens assembly and connected with the rear end of the collimation shell (10) through the compensation gasket (14).
Preferably, the fixing mode between the glass body of the optical fiber end cap (2) and the end cap flange (3) can adopt a cylindrical circumferential metallized welding mode, and low-temperature solder which is selected as filler can improve the whole heat conduction capacity of the product and reduce the temperature gradient;
Preferably, the high-power optical fiber end cap collimation device capable of being precisely inserted and pulled can realize full cavity sealing in an end face and radial sealing mode, so that the pollution prevention effect is improved, the reliability of products is improved, and meanwhile, the resetting precision of an optical axis is not influenced.
Preferably, the optical fiber end cap material is high-purity fused quartz, the light emitting surface is concave, the curvature radius is R, and the optical fiber end cap material is plated with a high-transmittance dielectric film which is consistent with the wavelength of a laser light source, the tail end of the optical fiber end cap is welded with an output optical fiber, and the coaxial angle is better than 0.1 degree;
Preferably, the collimating lens group is designed into a double mirror, and the material is high-purity fused quartz, so that spherical aberration is eliminated as effectively as possible, the return power of the front-stage laser is reduced, and the reliability of the product is improved;
preferably, the inner wall of the collimating lens barrel (10) further suppresses the influence of returned stray light on the melting point by adopting modes such as sand blasting, extinction threads, black anodizing and the like, and the reliability of the laser is improved.
Preferably, the positioning plug-in component (10) and the collimation shell (12) are matched to perform coarse positioning through shaft hole tolerance H7/f8, and are matched and combined to perform fine positioning through double positioning taper pins (11);
a high-power optical fiber coupling collimation method capable of being precisely inserted and pulled for engineering application comprises the following steps:
S1, matching the positioning plug-in (10) with the collimation shell (13)
The positioning plug (10) is fixed on the collimation shell (13) through a fastener, a taper pin hole is integrally machined, the depth of the pin hole is controlled to be larger than 2 times of the diameter of the pin, and the positioning plug (10) is matched with the collimation shell (13) by matching with the pin;
S2, flange gasket alignment of end cap assembly
The difference of different end cap assemblies carries out focal length compensation through the flange gasket (8), each end cap assembly is tested by using a focal length compensation testing device, the focal length difference delta f 1 between the end cap assemblies and the reference end cap assembly is recorded, and the matching thickness D x1 of the flange gasket (8) is adjusted according to correction data;
S3, compensating pad correction of collimating lens group
The focal length difference of different collimating lens components is compensated by a compensation gasket (14), and each collimating lens group is tested by a reference end cap and a focal length compensation testing device, and the thickness D x2 of the compensation gasket (14) is adjusted and matched properly;
S4, resetting and installing the output head of the optical fiber end cap
During installation, after the optical fiber end cap output head is inserted in a centering way with the collimation shell (13), 2 positioning taper pins (11) are used for positioning according to operation requirements, meanwhile, screws are machined at the tail ends of the positioning taper pins (11), the paired taper pins are repeatedly inserted and pulled to be positioned in cooperation with a pin puller, and the 2 positioning taper pins (11) are removed after a fastener is installed, so that higher matching precision is obtained. High-precision optical axis and pupil reset of the optical fiber end cap output head and the collimation light path are realized;
s5 thermal effect compensation of the collimating means
When the quality requirement of the high-power laser beam output by collimation is higher, in order to compensate the light beam quality attenuation generated by the thermal effect of the optical fiber end cap and the collimating mirror under the action of the high-power laser, the thickness of the flange gasket (8) of the end cap component can be adjusted for compensation;
in summary, compared with the prior art, the invention has the advantages that:
1. The invention discloses a high-power optical fiber coupling collimation device capable of being precisely inserted and pulled and a method thereof, which solve the problem of high-precision coupling between a high-power laser optical fiber and a post-stage synthesis device in the technical field of traditional high-power laser synthesis. Through reasonable process steps and methods, separable installation and precise plugging and resetting are realized on the basis of high quality and high pointing precision of laser output beams, and meanwhile, the method is simple to operate, safe and reliable, and the problems of difficulty brought by field optical path axis pupil coupling and debugging, reliability reduction caused by external welding melting point and the like are avoided.
2. The invention discloses a precise pluggable high-power optical fiber coupling collimation device and method for engineering application, which adopt a method of concave optical fiber end cap output and double-collimation lens combined design, effectively increase the light spot size of a rear-stage light path, reduce the power density, reduce the influence of the thermal effect of the light path on the quality of the light beam, effectively inhibit stray light, reduce return light power and improve the reliability of a laser in engineering application.
3. The high-power optical fiber coupling collimation device and method capable of being precisely inserted and pulled for engineering application adopt a modularized and flow thinking mode, are simple to operate and good in maintainability, realize rapid and high-precision coupling of the laser output optical fiber and a rear optical path by matching a coarse and fine positioning mode with a precision control, screening and compensation method of an optical fiber end cap assembly, and provide effective technical support for further improvement of rear-stage high power.
Drawings
In order to describe the technical solution of the present invention in detail and intuitively, the drawings that are required to be used in the embodiments will be briefly described.
FIG. 1 is an isometric view of a precision pluggable high power fiber coupling collimation device of the present invention for engineering applications.
FIG. 2 is a cross-sectional view of a precision pluggable high power fiber coupling collimator of the present invention.
FIG. 3 is a diagram of internal optical paths in a precision pluggable high power fiber coupling for engineering applications in accordance with the present invention.
Fig. 4 is a diagram showing the mating positions of reset pins in the coupling of a precision pluggable high-power optical fiber for engineering application.
Fig. 5 is a schematic diagram of a multi-path collimating output device according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of another multi-path collimating output unit according to an embodiment of the present invention.
In the figure, the laser output optical fiber (1), an optical fiber armor (2), a protective tail sleeve (3), a tail cover (4), an end cap tail frame (5), an optical fiber end cap (6), an end cap flange (7), a flange gasket (8), a front-stage sealing ring (9), a positioning plug (10), a positioning taper pin (11), a rear-stage sealing ring (12), a collimation shell (13), a compensation gasket (14), a collimation lens seat (15), a collimation lens a (16), a lens space ring (17), a collimation lens b (18), a collimation pressing ring (19) and a radial sealing ring (20)
Detailed Description
The invention is further illustrated by the following examples and figures, which are more specific and detailed, but should not be taken to limit the scope of the invention. It will be apparent to those skilled in the art that several modifications and extensions can be made thereto without departing from the spirit and scope of the invention, and the scope of the invention is to be limited only by the claims.
Fig. 1 and fig. 2 are schematic diagrams and sectional views of a precision pluggable high-power optical fiber coupling collimation device and method applied to engineering, which comprise a laser output optical fiber (1), an optical fiber armor (2), a protective tail sleeve (3), a tail cover (4), an end cap tail frame (5), an optical fiber end cap (6), an end cap flange (7), a flange gasket (8), a front-stage sealing ring (9), a positioning plug (10), a positioning taper pin (11), a rear-stage sealing ring (12), a collimation shell (13), a compensation gasket (14), a collimation lens seat (15), a collimation lens a (16), a lens spacer (17), a collimation lens b (18), a collimation pressing ring (19) and a radial sealing ring (20).
The method comprises the steps of carrying out metallization gold plating on the circumferential surface of a glass body of an optical fiber end cap (2), carrying out gold plating on the corresponding matching surface of an end cap flange (3) to form an end cap structure body by welding, connecting the end cap structure body with a special welding fixture, installing the end cap structure body at a corresponding position of a welding machine, adjusting the centering angle (less than 0.1 DEG) between an output optical fiber (1) (the inclination angle of the end face is less than 1 DEG) of the output optical fiber and the tail end of the optical fiber end cap (2), inserting depth and temperature, and then welding, wherein after the optical fiber welding is finished, special equipment for end cap integration is used, under the condition of ensuring strict centering, sequentially integrating an optical fiber armor (2), a protective tail sleeve (3), a tail cover (4) and an end cap tail frame (5), gluing and fixing force on a standard part to obtain end cap assemblies, finally testing through an end cap focal length screening device, recording the focal length difference value between each end cap assembly and the standard end cap assembly, adjusting the matching thickness of a flange gasket (8) according to data, and carrying out actual testing deviation delta d <0.1mm.
The optical fiber end cap output head is connected with the front end of a collimation shell (13) through a set of positioning taper pins (5), a collimation lens a (16), a lens spacer ring (17) and a collimation lens b (18) are designed to be tightly pressed through a circumferential glue injection and fixed, a collimation lens assembly is formed, a sealing ring (20) is arranged at the radial position of the collimation lens assembly and is connected with the rear end of the collimation shell (10) through a compensation gasket (14), when the quality of a light beam is tested in a rear light path, the best light beam quality state is realized through fine adjustment of the end cap flange, glue injection and solidification are realized, and the optical fiber end cap output head can be separated and reset through the set of positioning taper pins (5) and the collimation shell, and the optical axis resetting precision of the urad level is obtained;
as shown in figure 3, the optical fiber end cap material is high-purity fused quartz, the light emitting surface is concave, R=50mm is plated with a high-transmittance dielectric film which is consistent with the wavelength of a laser light source, the transmittance is more than 99.95%, the tail end of the optical fiber end cap is welded with an output optical fiber, and the coaxial angle is better than 0.1 degrees.
The optical fiber end cap and the optical fiber end cap flange adopt a metallization gold plating mode, the selected low-temperature solder is an indium sheet, the end cap material is titanium alloy, the contact area is gold plated, the thickness of a gold layer is 1-3um, the welding position is cylindrical circumferential welding, and the test leakage rate after welding is less than 1.0x10 -8m3/s.
The collimating lens group is designed into a double mirror, the material high-purity fused quartz can effectively eliminate spherical aberration, the surface of the collimating lens group is plated with an anti-reflection dielectric film corresponding to the wavelength of a laser light source, and the transmissivity is more than 99.95%.
The collimating lens barrel is made of indium steel material, the surface of the collimating lens barrel is plated with dark nickel, and the surface of the collimating lens barrel is low-air-release-rate silicon rubber at radial points between the collimating lens a and the collimating lens b, and the test leakage rate is less than 1.0x10 -8m3/s;
the inner wall of the collimation shell adopts a black anodizing and surface sand blasting mode to effectively inhibit returned stray light.
As shown in FIG. 4, in the embodiment, the positioning plug (10) and the alignment shell (12) are matched to perform coarse positioning through a shaft hole tolerance H7/f8, fine positioning is performed through a double positioning taper pin (11) combination, a straight pin a (11-5) and a straight pin b (11-6) are reference pin holes before pairing processing and reaming, during pairing, a processing reamer and a pin are strictly screened, the positioning plug (10) and the alignment shell (12) are combined to be processed after being installed, a 4mm taper pin is selected, a taper pin a (11-1) and a taper pin b (11-2) are paired, a taper pin c (11-3) and a taper pin d (11-4) are paired, an included angle between the paired taper pin and an optical axis is 120 degrees, and meanwhile, a screw is processed at the tail end of the positioning taper pin (11) to perform repeated plug positioning of the paired taper pin by a pin puller.
The optical fiber plug head is subjected to 50 times of optical fiber reset repeated tests, a 5.5m focal length is adopted to realize repeated tests by using an optical tube, the pointing deviation of a far-field optical axis is about 5urad-10urad, the quality of a light beam is near a diffraction limit beta <1.1, and when a single-path 3500w light emitting test is performed, the return light detection power is less than 30mw.
As shown in fig. 5 and 6, the two other schematic diagrams of the multi-path collimating output devices related to the embodiments are shown, the collimating mirror assembly is integrated with the post-stage power lifting optical path in the collimating housing, and the beam quality β=1.06 is recorded on the β tester during the single-fiber 3.8kW power light emitting process. Removing the double positioning taper pins, fully separating the end cap flange from the collimator lens cone, reinserting the optical fiber end cap flange, positioning and connecting by adopting the double taper pins, starting to test the output beam quality beta=1.05, recording the position of the output optical axis on the beta tester, repeatedly measuring for 30 times according to the operation, wherein the value of the beam quality beta is stable, and the pointing variation of the optical axis is within 10 urad.
Claims (7)
1. The high-power optical fiber coupling and collimating device capable of being precisely inserted and pulled for engineering application comprises a laser output optical fiber (1), an optical fiber armor (2), a protective tail sleeve (3), a tail cover (4), an end cap tail frame (5), an optical fiber end cap (6), an end cap flange (7), a flange gasket (8), a front-stage sealing ring (9), a positioning plug (10), a positioning taper pin (11), a collimating shell (13), a compensating gasket (14) and a collimating lens assembly, wherein the collimating lens assembly comprises a collimating lens seat (15), a collimating lens a (16), a lens spacer ring (17), a collimating lens b (18), a collimating pressing ring (19) and a radial sealing ring (20);
The optical fiber end cap (6) is characterized in that a circumferential or radial partial area of a glass body of the optical fiber end cap is fixed with an end cap flange (7), the tail end of the optical fiber end cap is in fusion connection with an output optical fiber (1), an optical fiber armor (2), a protective tail sleeve (3), a tail cover (4) and an end cap tail frame (5) are sequentially installed by using special end cap integration equipment to obtain end cap components, a focal length compensation testing device is used for testing each end cap component, a focal length difference value Deltaf 1 between each end cap component and a reference end cap component is recorded, and the matching thickness D x1 of a flange gasket (8) is adjusted according to correction data;
The optical fiber end cap output head is connected with the front end of the collimation shell (13) by using a group of positioning taper pins (11), a collimation lens a (16), a lens spacing ring (17) and a collimation lens b (18) are sequentially pressed by a collimation pressing ring (19) and are circumferentially fixed to form a collimation lens assembly, the collimation lens assembly is tested by a reference end cap assembly in a focal length compensation testing device, the thickness D x2 of a proper compensation gasket (14) is adjusted and matched, a radial sealing ring (20) is arranged at the radial position of the collimation lens assembly, and the collimation lens assembly is connected with the rear end of the collimation shell (13) by the compensation gasket (14);
The output end of the optical fiber end cap faces upwards, and a rear sealing ring (12) is arranged on the end face of the collimation shell;
The optical fiber end cap (6) is made of high-purity fused quartz, the light emitting surface is a concave surface, the radius is R, and the optical fiber end cap is coated with a high-transmittance dielectric film which is consistent with the wavelength of a laser light source.
2. The high-power optical fiber coupling and collimating device capable of being precisely inserted and pulled for engineering application according to claim 1, wherein the coaxial angle θ of the matching is detected when the tail end of the optical fiber end cap (6) is welded with the output optical fiber, and θ is smaller than 0.1 °.
3. The precision pluggable high-power optical fiber coupling collimation device for engineering application according to claim 1, wherein the part of the circumferential or radial area of the glass body of the optical fiber end cap (6) is fixed with the end cap flange (7) by adopting a cylindrical circumferential metallized welding mode or a cylindrical circumferential cementing mode.
4. The engineering-applied precise pluggable high-power optical fiber coupling collimation device is characterized in that the collimation lens assembly is a double lens or a triple lens, the effective light transmission caliber D=2.2kx 1/e 2 (k > 1) of the lens is achieved, the lens is sealed circumferentially by using silicone rubber with low air release rate, and the surface of the lens is plated with a high-transmittance anti-reflection dielectric film corresponding to the wavelength of a laser light source.
5. The engineering-applied precise pluggable high-power optical fiber coupling collimation device is characterized in that the inner wall of the collimation shell (13) adopts a sand blasting, extinction thread or black anodizing mode to increase the absorption of stray light.
6. A method of alignment for use with a precision pluggable high power fiber optic coupling alignment device of any one of claims 1-5, comprising the steps of:
S1, matching the positioning plug-in (10) with the collimation shell (13)
The axial outer diameter of the positioning plug (10) is inserted into the inner diameter of the collimation shell (13) to perform coarse positioning matching, and the two cylindrical pins a (11-5) and the cylindrical pin b (11-6) are utilized to assist in positioning at the end face of the positioning plug (10), so that the centering deviation range of an initial reference is ensured; fixing the positioning plug (10) on the alignment shell (13) through a fastener, integrally processing a hinged taper pin hole, and matching a pin to enable the positioning plug (10) to be matched with the alignment shell (13);
S2, flange gasket alignment of end cap assembly
The difference of different end cap assemblies carries out focal length compensation through the flange gasket (8), each end cap assembly is tested by using a focal length compensation testing device, the focal length difference delta f 1 between the end cap assemblies and the reference end cap assembly is recorded, and the matching thickness D x1 of the flange gasket (8) is adjusted according to correction data;
S3, correction of compensation gasket of collimating lens assembly
The focus difference of different collimating lens components is compensated by a compensation gasket (14), and the collimating lens components are tested by a reference end cap component in a focus compensation testing device, and the thickness D x2 of the compensation gasket (14) is adjusted and matched appropriately;
S4, resetting and installing the output head of the optical fiber end cap
During installation, after the optical fiber end cap output head is inserted into the alignment shell (13) in a centering way, the optical fiber end cap output head is positioned by using 2 positioning taper pins (11), and after a fastener is installed, the 2 positioning taper pins (11) are removed.
7. The method for coupling and collimating a precision pluggable high power optical fiber for engineering applications of claim 6, further comprising:
S5, thermal effect compensation of optical fiber coupling collimation device
To compensate for the attenuation of the beam quality due to thermal effects of the fiber end cap and collimator assembly under high power laser, compensation can be performed by adjusting the thickness of the end cap assembly flange gasket (8).
Priority Applications (1)
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| CN102081199A (en) * | 2010-12-17 | 2011-06-01 | 扬州科莱斯激光技术有限公司 | Fiber coupling device of high-power semiconductor laser |
| CN109143499A (en) * | 2018-09-29 | 2019-01-04 | 中国科学院长春光学精密机械与物理研究所 | A kind of fiber coupling device of high power laser fiber coupling |
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| JP3237441B2 (en) * | 1995-02-28 | 2001-12-10 | 三菱電機株式会社 | Laser processing equipment |
| CN216052563U (en) * | 2021-11-11 | 2022-03-15 | 山东神戎电子股份有限公司 | Laser illuminator with adjustable central wavelength |
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| CN102081199A (en) * | 2010-12-17 | 2011-06-01 | 扬州科莱斯激光技术有限公司 | Fiber coupling device of high-power semiconductor laser |
| CN109143499A (en) * | 2018-09-29 | 2019-01-04 | 中国科学院长春光学精密机械与物理研究所 | A kind of fiber coupling device of high power laser fiber coupling |
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