CN111934177B - Packaging equipment and method for polarization maintaining optical fiber butterfly laser - Google Patents
Packaging equipment and method for polarization maintaining optical fiber butterfly laser Download PDFInfo
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- CN111934177B CN111934177B CN202010796852.1A CN202010796852A CN111934177B CN 111934177 B CN111934177 B CN 111934177B CN 202010796852 A CN202010796852 A CN 202010796852A CN 111934177 B CN111934177 B CN 111934177B
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/083—Devices involving movement of the workpiece in at least one axial direction
- B23K26/0853—Devices involving movement of the workpiece in at least in two axial directions, e.g. in a plane
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
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- 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
- H01S3/06712—Polarising fibre; Polariser
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- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention provides packaging equipment of a polarization maintaining optical fiber butterfly laser, which comprises an optical fiber clamp module, a tube shell clamp module, a welding module and a vision monitoring module, wherein the optical fiber clamp module clamps an optical fiber to be sent into a tube shell, the position and the angle of the optical fiber are adjusted to be coupled, the tube shell clamp module clamps and positions the tube shell and can electrify the tube shell, the welding module welds a metal sleeve on the coupled optical fiber in the tube shell, and the vision monitoring module is used for monitoring the position and the angle of the optical fiber; the welding module comprises a tail pipe welding assembly arranged on one side of the shell clamp module, at least two electrodes are arranged on the tail pipe welding assembly, and the tail pipe welding assembly can be in contact with two sides of the through hole of the shell and can be electrified. The invention has the advantages of reasonable structural design of each module, compact connection and matching, simplified packaging process, improved production efficiency, solving the problem that the tail end metal sleeve is difficult to weld by adopting a laser welding assembly, along with small deformation of a weldment and easy realization of automatic control.
Description
Technical Field
The invention relates to the technical field of butterfly laser packaging, in particular to packaging equipment and a method of a polarization maintaining optical fiber butterfly laser.
Background
The light emitted by the semiconductor laser for communication is linearly polarized light, and when the light is transmitted in a common single-mode optical fiber, if the optical fiber is bent or kinked, the polarization state of an optical signal is changed. The polarization state of an optical signal is an important optical characteristic, and in many applications, there is a clear requirement for the polarization state of the optical signal, and a polarization-dependent light source is used, so that light emitted from a laser chip needs to be directly coupled into a polarization-maintaining fiber for use.
The polarization maintaining optical fiber is an optical fiber for transmitting linearly polarized light, can ensure that the linear polarization direction is unchanged, improves the coherent signal-to-noise ratio, and realizes high-precision measurement of physical quantity. The coupling of the general laser chip only needs to control the coupling power, but the polarization extinction ratio needs to be monitored in the coupling process of the polarization-maintaining optical fiber. In the coupling process of the polarization maintaining optical fiber, if a higher polarization extinction ratio needs to be obtained, the polarization maintaining optical fiber needs to be rotated, so that the slow axis of the polarization maintaining optical fiber is coincided with the polarization direction of emergent light of a laser, and the rotating angle needs to be accurately controllable.
Butterfly lasers are a common type of laser transmitter, named for their butterfly shape overall. For a butterfly laser provided with a polarization maintaining optical fiber, the optical fiber needs to be aligned with a light emitting chip in a butterfly device, and when the power-on completes the optical power coupling, the end face of the optical fiber needs to be adjusted to a preset angle to obtain a higher polarization extinction ratio. And after the coupling is successful, welding the optical fiber on the butterfly-shaped device through welding equipment, and completing the whole packaging process of the butterfly-shaped laser with the polarization-maintaining optical fiber.
Patent document CN110625256A discloses a butterfly laser fiber coupling and welding device, which can complete the packaging operation of coupling and welding the polarization maintaining fiber and the butterfly device, and has the functions of optical power coupling and optical fiber angle coupling. According to the scheme, the front end of the optical fiber is fixed on the heat sink through the saddle clamp, the operation is complex, and meanwhile, the welding of the tail end of the optical fiber and the through hole is difficult to realize by means of the laser welding device above, so that the packaging mode of the butterfly laser still has a further optimization space.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a packaging scheme of a polarization maintaining optical fiber butterfly laser, which is used for further optimizing the packaging process and improving the packaging efficiency and the coupling welding quality.
In order to achieve the purpose, the invention provides packaging equipment of a polarization maintaining optical fiber butterfly laser, which comprises an optical fiber clamp module, a tube shell clamp module, a welding module and a vision monitoring module, wherein the optical fiber clamp module clamps an optical fiber to be sent into a tube shell, adjusts the position and the angle of the optical fiber to be coupled, the tube shell clamp module clamps and positions the tube shell and can electrify the tube shell, the welding module welds a metal sleeve on the coupled optical fiber in the tube shell, and the vision monitoring module is used for monitoring the position and the angle of the optical fiber;
the welding module is in including setting up the laser welding subassembly and the setting of tube anchor clamps module top are in the tail pipe welding subassembly of tube anchor clamps module one side, the metal sleeve of laser welding subassembly welding optic fibre front end, the metal sleeve of tail pipe welding subassembly welding optic fibre tail end, be provided with two at least electrodes on the tail pipe welding subassembly, the electrode can with the through-hole both sides contact circular telegram of tube carries out resistance welding.
Further, the tail pipe welding assembly comprises a tail pipe welding seat, the tail pipe welding seat is arranged on a tail pipe lifting table, the tail pipe lifting table is arranged on a tail pipe translation table, a sliding groove is formed in the tail pipe welding seat, two sliding blocks are oppositely arranged on the sliding groove, the sliding blocks are driven by a driving mechanism on the tail pipe welding seat, each sliding block is provided with an electrode seat, a connecting rod is arranged on each electrode seat, the top end of each connecting rod is provided with the electrode, and the electrode is a graphite electrode.
Further, the laser welding assembly is arranged on a support frame and comprises a welding gun actuating mechanism with multiple degrees of freedom and a laser welding gun arranged on the welding gun actuating mechanism.
Further, the fiber clamp module comprises a coupling displacement table, a mounting plate arranged on the coupling displacement table, a fiber rotary support table arranged at one end of the mounting plate, and a front-end chuck assembly arranged at the other end of the mounting plate, wherein the coupling displacement table has three-axis translational freedom degrees and comprises an X-axis linear guide rail, a Y-axis displacement platform arranged on the X-axis linear guide rail, and a Z-axis displacement platform arranged on the Y-axis displacement platform, the mounting plate is arranged on the Z-axis displacement platform, a rotatable turntable is arranged on the fiber rotary support table, a fiber tail end clamp is arranged on the turntable, and the front-end chuck assembly comprises a front-end chuck.
Further, the optical fiber tail end clamp comprises a first clamping arm and a second clamping arm which are integrally arranged, the upper surfaces of the first clamping arm and the second clamping arm are provided with grooves for placing the optical fibers, a pressure lever is arranged in a cavity formed by the first clamping arm, the middle part of the pressure lever is rotatably connected with the first clamping arm through a bolt, the first end of the pressure lever is contacted with the front end of the second clamping arm, the first clamping arm is also provided with a first through hole and a second through hole, the first through hole corresponds to the front end of the second clamping arm, the second through hole corresponds to the second end of the pressure lever, the first through hole is internally provided with a spring, the second through hole is provided with a clamp driving cylinder, the end part of a piston rod of the clamp cylinder extends into the second through hole, and the optical fiber tail end clamps are combined into a first positioning groove for positioning the tail end of the optical fiber, the end parts of the optical fiber tail end chucks are combined into a second positioning groove for positioning the metal sleeve at the tail end of the optical fiber, and a limiting part is arranged at the top end of the second positioning groove in a protruding mode, so that the width of a notch of the second positioning groove is reduced when the two optical fiber tail end chucks are attached.
Further, the front end chuck subassembly includes base displacement platform and sets up front end chuck seat on the base displacement platform, base displacement platform sets up on the mounting panel, triaxial translation degree of freedom has, be provided with a Z axle slip table on the front end chuck seat, it is provided with a Y axle slip table to slide on the Z axle slip table, it is provided with a connecting plate to slide on the Y axle slip table, the front end chuck sets up the tip of connecting plate.
Further, the connecting plate with all be provided with a sensor transmitting terminal on the Y axle slip table, Y axle slip table and be provided with a sensor receiving terminal on the Z axle slip table, the last sensor receiving terminal of Y axle slip table with the sensor transmitting terminal on the connecting plate corresponds, the last sensor receiving terminal of Z axle slip table with the last sensor transmitting terminal of Y axle slip table corresponds.
Further, the tube clamp module comprises a tube clamp seat, the upper surface of the tube clamp seat is provided with a mounting groove for mounting a tube, one end of the mounting groove is provided with a stop block, the other end of the mounting groove is provided with a pressing block, the pressing block is driven by a pressing cylinder, a plurality of lead grooves are arranged on two sides of the mounting groove, leads which are in contact with and are arranged at two ends of the tube are arranged in the lead grooves, a transverse pressing block is arranged at the lead grooves, and one end of the pressing block is hinged to the tube clamp seat.
Further, the vision monitoring module comprises a position monitoring microscope, an angle monitoring microscope and a tail pipe monitoring camera, the position monitoring microscope is arranged right above the pipe clamp module, the angle monitoring microscope is arranged above the pipe clamp module, the tail pipe monitoring camera is arranged on one side of the pipe clamp module, the position monitoring microscope, the angle monitoring microscope and the tail pipe monitoring camera are respectively connected with a multi-dimensional adjusting table, a light source is arranged on one side, opposite to the tail pipe monitoring camera, of the pipe clamp module, and the light source is arranged on a light source lifting table.
The invention also provides a packaging method of the polarization maintaining optical fiber butterfly laser, which comprises the following steps:
placing a tube shell of a butterfly laser on a tube shell clamp module to clamp and fix, and electrifying the butterfly laser by contacting leads at two sides with pins;
placing the optical fiber on an optical fiber tail end clamp, and controlling the optical fiber tail end clamp to enable the optical fiber to enter the tube shell from the through hole of the tube shell;
when the visual monitoring module monitors that the metal sleeve at the front end of the optical fiber is positioned on the heat sink of the tube shell and the metal sleeve at the tail end of the optical fiber is positioned at the preset position of the through hole, the front-end chuck moves to the metal sleeve at the front end of the optical fiber and adsorbs the metal sleeve through the vacuum action, and the optical fiber clamp module drives the whole position of the optical fiber to be finely adjusted until the optical power in the optical fiber tested by the optical power tester reaches the maximum value;
closing the vacuum adsorption of the front-end chuck, monitoring the end face of the optical fiber through an angle monitoring microscope of the visual monitoring module, observing whether the projection of the end face is a straight line, if not, roughly adjusting through an optical fiber rotary supporting table, and finely adjusting until the polarization extinction ratio tested by the extinction ratio tester reaches a specified range;
step five, the front-end chuck is opened again for vacuum adsorption, the laser welding assembly completes the welding between the metal sleeve at the front end of the optical fiber and the heat sink, the electrode of the tail pipe welding assembly contacts with the two sides of the through hole of the tube shell, and the resistance welding between the metal sleeve at the tail end of the optical fiber and the inner side wall of the through hole is completed;
and step six, taking down the packaged butterfly laser, and replacing a new tube shell to prepare for next packaging.
The scheme of the invention has the following beneficial effects:
the optical fiber welding device is provided with the optical fiber clamp module, the tube shell clamp module, the welding module and the visual monitoring module, each module is reasonable in structural design and compact in connection and matching, coupling of multiple degrees of freedom of optical fibers can be realized simultaneously, the packaging process is simplified, the production efficiency is improved, the tail tube welding assembly is arranged, two sides of the through hole are communicated through the two electrodes for resistance welding, the surfaces of the metal sleeve and the through hole are combined after being melted, the welding connection effect is achieved, the problem that the upper laser welding assembly is difficult to weld is solved, and the optical fiber welding device has the advantages that welding deformation is small, and automatic control is easy to realize;
the optical fiber rotary supporting table and the front-end chuck assembly in the optical fiber clamp module are respectively arranged at two ends of the mounting plate, so that when the front-end chuck displaces and adsorbs and fixes the metal sleeve at the front end of the optical fiber, the optical fiber rotary supporting table and the front-end chuck assembly cannot generate obvious mutual interference, and the coupling precision is improved;
the optical fiber tail end clamp adopts an integrated form, the opening and closing of the clamp head are controlled by the air cylinder or the manual knob, the operation is more convenient compared with the prior art, in addition, the end part of the optical fiber tail end clamp head is combined to form a first positioning groove and a second positioning groove, the optical fiber tail end with the enlarged outer diameter and the metal sleeve can be respectively clamped and positioned, and the limiting part with the protruded top end can better prevent the optical fiber from moving out of the second positioning groove in the process of conveying the optical fiber to the tube shell;
according to the monitoring module, the industrial camera at the front end of the monitoring optical fiber is replaced by the electronic microscope, the magnification of the monitoring module can reach hundreds of times, compared with the monitoring precision of the industrial camera, the monitoring module is higher, the coupling process of the optical fiber and the tube shell is monitored in the whole process, and the butterfly laser packaging quality is improved through real-time calibration;
according to the packaging method of the polarization maintaining optical fiber butterfly laser, after the metal sleeve is coupled, the direct adsorption of the front end chuck is adopted, the prior saddle clamp fixing mode is replaced, the operation steps are optimized, meanwhile, the metal sleeve at the tail end of the optical fiber is welded in a resistance welding mode, and the problem that the welding of the upper laser welding component is difficult is solved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a butterfly laser according to the present invention;
FIG. 3 is a schematic view of a tailpipe welding assembly configuration of the present invention;
FIG. 4 is a schematic structural diagram of an optical fiber clamp module according to the present invention;
FIG. 5 is a schematic view of the structure of the fiber end clamp of the present invention;
FIG. 6 is a cross-sectional view (in part) of a fiber pigtail clamp of the present invention;
FIG. 7 is a detailed schematic view of the fiber pigtail clip of the present invention;
FIG. 8 is a schematic structural diagram of a tube clamp module according to the present invention;
fig. 9 is an enlarged view of fig. 1 at a.
[ description of reference ]
1-an optical fiber; 11-fiber front end; 12-fiber tail end; 13-a metal sleeve; 2-a pipe shell; 21-a box body; 22-a heat sink; 23-pin; 24-a chip; 25-a through hole; 3-an optical fiber clamp module; 31-a coupling displacement stage; 32-a mounting plate; 33-optical fiber rotary support table; 34-a turntable; 35-fiber tail end clamp; 36-front end cartridge; 37-X axis linear guide; a 38-Y axis displacement stage; a 39-Z axis displacement stage; 310-a first gripper arm; 311-a second gripper arm; 312-a groove; 313-a compression bar; 314-a first via; 315-second via; 316-clamp drive cylinder; 317-optical fiber tail end chuck; 318-first positioning groove; 319-second positioning groove; 320-a limiting part; 321-a base displacement platform; 322-front end cartridge base; 323-Z axis slipway; a 324-Y axis slide; 325-connecting plate; 326-sensor transmitting end; 327-sensor receiving end; 4-a tube shell clamp module; 41-a pipe shell clamping seat; 42-mounting grooves; 43-a stop block; 44-a compression block; 45-lead slots; 46-a lead; 47-briquetting; 5-welding the module; 51-laser welding the assembly; 52-a torch actuator; 53-laser welding torch; 54-tailpipe weld assembly; 55-tail pipe welding seat; 56-tail pipe lift; 57-tailpipe translation stage; 58-chute; 59-a slider; 510-an electrode holder; 511-connecting rod; 512-electrodes; 6-a vision monitoring module; 61-position monitoring microscope; 62-angle monitoring microscope; 63-a tailpipe monitoring camera; 64-a multi-dimensional adjustment stage; 65-a light source; 7-a support frame.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all 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. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1:
in this embodiment, the optical fiber 1 is a polarization maintaining optical fiber, and includes an optical fiber front end 11 and an optical fiber tail end 12, the diameter of the optical fiber tail end 12 is enlarged relative to the optical fiber front end 11, and a metal sleeve 13 is respectively sleeved at the optical fiber front end 11 and the optical fiber tail end 12. The tube shell 2 is butterfly-shaped, and comprises a bottom plate, a box body 21 arranged on the bottom plate, a heat sink 22 arranged in the box body 21, and pins 23 arranged on two sides of the box body 21 and used for electrifying, wherein a chip 24 is arranged on the heat sink 22. During packaging, the front end 11 of the optical fiber and the metal sleeve 13 therein are fed into the upper surface of the heat sink 22 from the through hole 25 at one side of the box body 21 to complete optical power and angle coupling between the optical fiber 1 and the chip 24, then the metal sleeve 13 at the front end 11 of the optical fiber is welded with the heat sink 22, the metal sleeve 13 at the tail end 12 of the optical fiber is welded with the side wall of the through hole 25, and the butterfly laser can be integrally referred to fig. 2.
Referring to fig. 1, an embodiment of the present invention provides a butterfly laser coupling and welding apparatus with a polarization maintaining fiber, including a fiber clamp module 3, a package clamp module 4, a welding module 5, and a vision monitoring module 6. The optical fiber clamp module 3 clamps the optical fiber 1 and sends the optical fiber 1 into the tube shell 2, the position of the optical fiber 1 is firstly adjusted to enable the optical power to be coupled to the maximum, and then the optical fiber 1 is rotated to adjust the polarization extinction ratio to a specified range. The tube clamp module 4 clamps and positions the tube shell 2, and can electrify the tube shell 2, so that the chip 24 in the tube shell 2 emits light to perform optical power and angle coupling. And after the coupling is finished, the welding module 5 welds the metal sleeve 13 of the optical fiber 1 on the tube shell 2, so that the optical fiber 1 and the tube shell 2 are packaged into an integral device. The vision monitoring module 6 mainly monitors the position and angle of the optical fiber 1 and confirms the adjustment amount in the coupling process.
Referring to fig. 3, as an improvement, the welding module 5 of the present embodiment includes a laser welding assembly 51 disposed above the tube-housing fixture module 4 and a tail tube welding assembly 54 disposed on one side of the tube-housing fixture module 4, the laser welding assembly 51 is disposed on a support frame 7 and includes a welding gun actuator 52 with multiple degrees of freedom and a laser welding gun 53 disposed on the welding gun actuator 52, and the laser welding gun 53 is mainly used for welding the metal sleeve 13 of the optical fiber front end 11 and the heat sink 22. The tail tube welding assembly 54 is mainly used for welding the metal sleeve 13 of the fiber tail end 12 with the through hole 25 of the package 2. The tailpipe weld assembly 54 specifically includes a tailpipe weld seat 55, the tailpipe weld seat 55 being disposed on a tailpipe lift 56, the tailpipe lift 56 being disposed on a tailpipe translation stage 57, such that the tailpipe weld seat 55 has two translational degrees of freedom for horizontal and vertical displacement. The tail pipe welding seat 55 is provided with a sliding chute 58, and the sliding chute 58 is provided with two sliding blocks 59 which are oppositely arranged and driven by a driving mechanism on the tail pipe welding seat 55. Each slider 59 is provided with an electrode holder 510, on which a connecting rod 511 is provided, and an electrode 512 is provided at the top end of the connecting rod 511.
The metal sleeve 13 of the fiber tail end 12 is subjected to resistance welding, and the tail pipe welding seat 55 is moved horizontally and ascendingly to a preset position, so that the two electrodes 512 are respectively positioned at two sides of the through hole 25. Then, the two sliders 59 move toward each other to contact the outer side wall of the convex portion of the through hole 25, and are energized to generate current for resistance welding, so that the surfaces of the metal sleeve 13 and the through hole 25 are melted and combined to achieve the effect of welding connection. Since the metal sleeve 13 is positioned in the through hole 25, it is difficult to weld by the upper laser welding unit 51, and therefore resistance welding is performed by the tail pipe welding unit 54, which has advantages of small deformation of the welded article and easy automation control. In a preferred embodiment, the electrodes 512 of the tail pipe welding assembly 54 are all graphite electrodes, and are characterized by easy machining, high removal rate by electric discharge machining, low graphite loss, and the like.
Referring to fig. 4, the optical fiber clamping module 3 includes a coupling displacement stage 31, a mounting plate 32 disposed on the coupling displacement stage 31, an optical fiber rotation support stage 33 disposed at one end of the mounting plate 32, and a front-end clamping head assembly disposed at the other end of the mounting plate 32. The optical fiber rotary supporting platform 33 is provided with a rotary turntable 34, the turntable 34 is provided with an optical fiber tail end clamp 35, and the front end chuck component comprises a front end chuck 36. The coupling displacement table 31 has three-axis translational degrees of freedom, drives the optical fiber tail end clamp 35 to feed the clamped optical fiber 1 into the tube shell 2, and adjusts the position to enable the optical power to reach the maximum value. The coupling displacement table 31 specifically comprises an X-axis linear guide 37, a Y-axis displacement platform 38 arranged on the X-axis linear guide 37, and a Z-axis displacement platform 39 arranged on the Y-axis displacement platform 38, and the mounting plate 32 is fixedly arranged on the Z-axis displacement platform 39. The X-axis linear guide 37 is used as a bottom support member of the entire optical fiber clamp module 3, and the platform is replaced by a linear guide, so that the support condition can be improved, and the stability of coupling motion can be improved.
In this embodiment, the optical fiber rotary support platform 33 and the front end chuck assembly are respectively disposed at two ends of the mounting plate 32, so that when the front end chuck 36 displaces and adsorbs the metal sleeve 13 fixing the optical fiber front end 11, since it is no longer directly supported by the optical fiber rotary support platform 33, it will not significantly interfere with the optical fiber rotary support platform 33, which causes disturbance of the optical fiber tail end clamp 35 during feeding or angle adjustment, resulting in reduction of coupling precision.
As a further improvement, referring to fig. 5 and fig. 6, the optical fiber tail end clamp 35 includes a first clamping arm 310 and a second clamping arm 311 integrally formed, and a half-edge groove 312 for accommodating the optical fiber 1 is respectively formed on the upper surfaces of the first clamping arm 310 and the second clamping arm 31. A pressure lever 313 is arranged in a cavity formed by the first clamping arm 310, the middle of the pressure lever 313 is hinged with the first clamping arm 310 through a bolt, and the first end of the pressure lever 313 is contacted with the front end of the second clamping arm 311. A first through hole 314 and a second through hole 315 are further formed in the first clamping arm 310, the first through hole 314 corresponds to the front end of the second clamping arm 311, the second through hole 315 corresponds to the second end of the pressing rod 313, a spring (not shown in the figure) is arranged in the first through hole 314, a clamp driving cylinder 316 is arranged at the second through hole 315, the end of a piston rod of the clamp driving cylinder 316 extends into the second through hole 315, when the piston rod of the clamp driving cylinder 316 extends inwards along the second through hole 315, the second end of the pressing rod 313 is pushed to rotate towards the outer side of the first clamping arm 310, therefore, the first end of the pressing rod 313 extrudes the front end thin wall of the second clamping arm 311 inwards while rotating around a hinge point, so that the second clamping arm 311 is close to the first clamping arm 310, the grooves 312 at the two half sides are closed to combine to clamp the optical fiber 1, and the spring is compressed. When the optical fiber 1 needs to be unclamped, the piston rod of the clamp driving cylinder 316 is retracted out of the second through hole 315, and the front thin wall of the second clamping arm 311 is pushed by the spring to be away from the first clamping arm 31, so that the optical fiber 1 is unclamped. The clamp driving cylinder 316 can be replaced by a device for controlling the displacement of the plunger piston through manual screwing, so that the clamping tightness can be adjusted more conveniently.
Referring to fig. 7, the front ends of the first clamping arm 310 and the second clamping arm 311 are respectively provided with a fiber tail end clamping head 317, and the two fiber tail end clamping heads 317 are combined into a first positioning groove 318 for positioning the fiber tail end 12, so as to support and position the fiber tail end 12 with the enlarged outer diameter. The ends of the fiber pigtail collet 317 are assembled into a second detent 319 that locates the metal sleeve 13 at the fiber pigtail 12. The tail end part of this metal sleeve 13 is located second constant head tank 319 during the centre gripping, and the top protrusion of second constant head tank 319 is provided with spacing portion 320 simultaneously for the notch width of second constant head tank 319 diminishes when optic fibre tail-end cartridge 317 draws close the centre gripping, with the vertical position of restriction metal sleeve 13, can prevent better that optic fibre 1 from carrying to the in-process of tube shell 2, and metal sleeve 13 is because optic fibre 1 warp and sticks out second constant head tank 319.
Referring to fig. 4, the front chuck assembly includes a base displacement platform 321 and a front chuck base 322 disposed on the base displacement platform 321, wherein the base displacement platform 321 is disposed on the mounting plate 32, has three-axis translational freedom, and can adjust the front chuck base 322 to a predetermined position. Meanwhile, a Z-axis sliding table 323 is arranged on the front end chuck base 322, a Y-axis sliding table 324 is slidably arranged on the Z-axis sliding table 323, a connecting plate 325 is slidably arranged on the Y-axis sliding table 324, and the front end chuck 36 is arranged at the end of the connecting plate 325. When the optical fiber 1 needs to be welded with the metal sleeve 13 after being coupled, the front-end chuck 36 moves to a position right above the metal sleeve 13 of the optical fiber front end 11 along with the connecting plate 325 under the driving of the Y-axis sliding table 324, and then moves downwards under the driving of the Z-axis sliding table 323, and the bottom end of the front-end chuck contacts with the upper surface of the metal sleeve 13 and generates adsorption through the vacuum action, so that the position of the front-end metal sleeve 13 is fixed, and the metal sleeve 13 is prevented from shifting in the optical power coupling and welding processes.
As a further improvement, a sensor emitting end 326 is arranged on both the connecting plate 325 and the Y-axis sliding table 324 of the front end chuck assembly, and a sensor receiving end 327 is arranged on the Y-axis sliding table 324 and the Z-axis sliding table 323, specifically, the sensor receiving end on the Y-axis sliding table 324 corresponds to the sensor emitting end on the connecting plate, and the sensor receiving end 327 on the Z-axis sliding table 323 corresponds to the sensor emitting end 326 on the Y-axis sliding table 324. In the process of moving the front end chuck 36, after the sensor receiving end 327 of the Z-axis sliding table 323 detects the sensor transmitting end 326 of the Y-axis sliding table 324, it indicates that the vertical position of the front end chuck 36 is already in place, and the front end chuck can move horizontally; when the sensor receiving end 327 of the Y-axis sliding table 324 detects the sensor emitting end 326 of the connection plate 325, it indicates that the front end chuck 36 has translated to a predetermined position, i.e., right above the housing 2, and can start to move down to adsorb the metal sleeve 13. The sensor is mainly arranged as a protection device, so that the situation that the front end chuck 36 and the shell 2 and other structures are in hard collision to cause damage of devices due to the fact that the connecting plate 325 is driven to translate after the Y-axis sliding table 324 is not lifted to a preset position is prevented.
Referring to fig. 8, the cartridge clamp module 4 includes a cartridge holder 41, a mounting groove 42 for mounting the cartridge 2 is formed on the upper surface of the cartridge holder 41, a stop 43 is formed at one end of the mounting groove 42, a pressing block 44 is formed at the other end of the mounting groove 42, the pressing block 44 is driven by a pressing cylinder disposed on the cartridge holder 41, the cartridge 2 is placed in the mounting groove 42 when being mounted, the two sides of the cartridge are automatically positioned by the side walls of the mounting groove 42, and the pressing cylinder drives the pressing block 44 to tightly press the end of the cartridge 2 against the stop 43, so that the mounting and fixing of the cartridge 2 are completed. The two sides of the mounting groove 42 are provided with a plurality of lead grooves 45, the lead grooves 45 are internally provided with leads 46 which are contacted with the pins 23 at the two ends of the tube shell 2, and the leads 46 are electrified through a circuit board in the tube shell clamping seat 41. In this embodiment, a transverse pressing block 47 is arranged at the lead slot 45, an opening into which the pressing block 47 is pressed is formed in the side wall of the lead slot 45, one end of the pressing block 47 is hinged to the tube shell clamping seat 41, and after the tube shell 2 is installed in place and the pin 23 is inserted into the lead slot 45, the pressing block 47 is pressed into the lead slot 45, so that the pin 23 is pressed to form good contact with the lead 46, and convenience of power-on operation is further improved compared with the prior art.
The vision monitoring module 6 comprises a position monitoring microscope 61, an angle monitoring microscope 62 and a tail pipe monitoring camera 63, the position monitoring microscope 61 is arranged right above the tube clamp module 4, the angle monitoring microscope 62 is arranged above the tube clamp module 4, and the tail pipe monitoring camera 63 is arranged on one side of the tube clamp module 4. The position monitoring microscope 61, the angle monitoring microscope 62 and the tail pipe monitoring camera 63 are respectively connected to a multidimensional adjustment stage 64. The position and the angle of the front end 11 of the optical fiber are detected by an electron microscope, the magnification of the electron microscope can reach hundreds of times, and the monitoring precision of the electron microscope is higher compared with that of an industrial camera. The tail pipe monitoring camera 63 is mainly used for monitoring the position of the through hole 25 where the metal sleeve 13 of the tail end 12 of the optical fiber is installed, and a common industrial camera can be adopted. In addition, a light source 65 is provided on the side of the case clamp module 4 opposite to the tail pipe monitoring camera 63 to provide light required for shooting by the tail pipe monitoring camera 63, and the light source is provided on a light source lifting table 66, so that the light source 65 is lowered and retracted when the case 2 is mounted, and is mounted from this side.
Example 2:
placing a tube shell 2 of a butterfly laser on a tube shell clamp module 4 for clamping and fixing, and electrifying the butterfly laser by contacting leads 46 and pins 23 at two sides so that a chip 24 of the butterfly laser emits light to carry out coupling of optical power and coupling of partial positive extinction ratio (angle);
placing the optical fiber 1 on an optical fiber tail end clamp 35, and controlling the optical fiber tail end clamp 35 to enable the optical fiber 1 to enter the tube shell 2 from the through hole 25 of the tube shell 2, wherein the optical fiber 1, the metal sleeve 13 and the like are ensured to be coaxial with the through hole 25 as much as possible in the process;
step three, when the vision monitoring module 6 monitors that the metal sleeve 13 of the front end 11 of the optical fiber is positioned on the heat sink 22 of the tube shell 2 and the metal sleeve 13 of the tail end 12 of the optical fiber is positioned at the preset position of the through hole 25, the front end chuck 36 moves to the metal sleeve 13 of the front end 11 of the optical fiber and adsorbs the metal sleeve 13 through vacuum action, at the moment, the metal sleeve 13 of the front end 11 of the optical fiber is fixed by the front end chuck 36, the metal sleeve 13 of the tail end 12 of the optical fiber is fixed by the tail end clamp 35 of the optical fiber, and then the optical clamp module 3 drives the optical fiber 1 to finely adjust the whole position through the three-axis displacement of the mounting plate 32 until the optical power in the optical fiber 1 tested by the optical power tester reaches the maximum value, so as to complete the coupling of the optical power;
step four, the front-end chuck 36 closes the vacuum adsorption, keeps the position unchanged, and still can limit the displacement of the metal sleeve 13 at the front end 11 of the optical fiber because the bottom end of the front-end chuck is concave, at the moment, the end surface of the optical fiber 1 is monitored by the angle monitoring microscope 62 of the vision monitoring module 6, whether the end surface projection is a straight line or not is observed, if not, the optical fiber tail end clamp is rotated by the optical fiber rotating support table 33 for rough adjustment, when the end surface projection shows that the end surface projection is a straight line, the optical fiber tail end clamp 35 is further rotated for fine adjustment until the polarization extinction ratio tested by the installed extinction ratio tester reaches the specified range, and the coupling of the polarization extinction ratio (angle) is completed;
step five, the front end chuck 36 starts vacuum adsorption again, the front end metal sleeve 13 is fixed, the laser welding gun 53 of the laser welding assembly 51 aligns to the welding point between the optical fiber front end 11 metal sleeve 13 and the heat sink 22, laser welding is completed, meanwhile, the electrodes 512 on the two sides of the tail pipe welding assembly 54 are close to each other, the two sides of the through hole 25 of the tube shell 2 are contacted and communicated to generate current, the surfaces of the metal sleeve 13 and the through hole 25 are melted and then combined, and resistance welding between the tail end metal sleeve 13 and the inner side wall of the through hole 25 is completed;
and step six, taking down the packaged butterfly laser, and replacing a new tube shell 2 to prepare for next packaging.
According to the packaging method of the polarization maintaining optical fiber butterfly laser, after the metal sleeve 13 is coupled, the front end chuck 36 is directly adsorbed, the former saddle clamp fixing mode is replaced, the operation steps are optimized, meanwhile, the metal sleeve 13 of the optical fiber tail end 12 is welded in a resistance welding mode, and the problem that welding is difficult due to the fact that a laser welding component above the metal sleeve is used for welding is solved.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. The packaging equipment of the polarization maintaining optical fiber butterfly laser is characterized by comprising an optical fiber clamp module, a tube shell clamp module, a welding module and a vision monitoring module, wherein the optical fiber clamp module clamps an optical fiber to be sent into a tube shell, adjusts the position and the angle of the optical fiber to be coupled, the tube shell clamp module clamps and positions the tube shell and can electrify the tube shell, the welding module welds a metal sleeve on the coupled optical fiber in the tube shell, and the vision monitoring module is used for monitoring the position and the angle of the optical fiber;
the welding module comprises a laser welding assembly arranged above the tube shell clamp module and a tail tube welding assembly arranged on one side of the tube shell clamp module, the laser welding assembly is used for welding a metal sleeve at the front end of an optical fiber, the tail tube welding assembly is used for welding a metal sleeve at the tail end of the optical fiber, at least two electrodes are arranged on the tail tube welding assembly, and the electrodes can be in contact with and electrified with two sides of a through hole of the tube shell to perform resistance welding;
the tail pipe welding assembly comprises a tail pipe welding seat, the tail pipe welding seat is arranged on a tail pipe lifting table, the tail pipe lifting table is arranged on a tail pipe translation table, a sliding groove is formed in the tail pipe welding seat, two sliding blocks are oppositely arranged on the sliding groove, the sliding blocks are driven by a driving mechanism on the tail pipe welding seat, each sliding block is provided with an electrode seat, a connecting rod is arranged on each electrode seat, the top end of each connecting rod is provided with the electrode, and the electrode is a graphite electrode.
2. The apparatus of claim 1, wherein the laser welding assembly is disposed on a support frame and comprises a torch actuator having multiple degrees of freedom and a laser torch disposed on the torch actuator.
3. The packaging device of the polarization maintaining fiber butterfly laser device as claimed in claim 1, wherein the package clamp module comprises a package holder, the package holder has a mounting groove on its upper surface for mounting the package, the mounting groove has a stop block at one end and a pressing block at the other end, the pressing block is driven by a pressing cylinder, the mounting groove has a plurality of lead slots on both sides, the lead slots have leads electrically connected to the leads at both ends of the package, the lead slots have a transverse pressing block, and one end of the pressing block is hinged to the package holder.
4. The apparatus of claim 1, wherein the vision monitoring module comprises a position monitoring microscope, an angle monitoring microscope and a tail pipe monitoring camera, the position monitoring microscope is disposed right above the tube clamp module, the angle monitoring microscope is disposed obliquely above the tube clamp module, the tail pipe monitoring camera is disposed at one side of the tube clamp module, the position monitoring microscope, the angle monitoring microscope and the tail pipe monitoring camera are respectively connected to a multi-dimensional adjusting platform, a light source is disposed at a side of the tube clamp module opposite to the tail pipe monitoring camera, and the light source is disposed on a light source lifting platform.
5. A packaging method of a polarization maintaining fiber butterfly laser is applied to the packaging equipment of the polarization maintaining fiber butterfly laser as claimed in any one of claims 1 to 4, and is characterized by comprising the following steps:
placing a tube shell of a butterfly laser on a tube shell clamp module to clamp and fix, and electrifying the butterfly laser by contacting leads at two sides with pins;
placing the optical fiber on an optical fiber tail end clamp, and controlling the optical fiber tail end clamp to enable the optical fiber to enter the tube shell from the through hole of the tube shell;
when the visual monitoring module monitors that the metal sleeve at the front end of the optical fiber is positioned on the heat sink of the tube shell and the metal sleeve at the tail end of the optical fiber is positioned at the preset position of the through hole, the front-end chuck moves to the metal sleeve at the front end of the optical fiber and adsorbs the metal sleeve through the vacuum action, and the optical fiber clamp module drives the whole position of the optical fiber to be finely adjusted until the optical power in the optical fiber tested by the optical power tester reaches the maximum value;
closing the vacuum adsorption of the front-end chuck, monitoring the end face of the optical fiber through an angle monitoring microscope of the visual monitoring module, observing whether the projection of the end face is a straight line, if not, roughly adjusting through an optical fiber rotary supporting table, and finely adjusting until the polarization extinction ratio tested by the extinction ratio tester reaches a specified range;
step five, the front-end chuck is opened again for vacuum adsorption, the laser welding assembly completes the welding between the metal sleeve at the front end of the optical fiber and the heat sink, the electrode of the tail pipe welding assembly contacts with the two sides of the through hole of the tube shell, and the resistance welding between the metal sleeve at the tail end of the optical fiber and the inner side wall of the through hole is completed;
and step six, taking down the packaged butterfly laser, and replacing a new tube shell to prepare for next packaging.
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