CN117130096A - Optical fiber fusion splicing device and fusion splicing method - Google Patents
Optical fiber fusion splicing device and fusion splicing method Download PDFInfo
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- CN117130096A CN117130096A CN202310986596.6A CN202310986596A CN117130096A CN 117130096 A CN117130096 A CN 117130096A CN 202310986596 A CN202310986596 A CN 202310986596A CN 117130096 A CN117130096 A CN 117130096A
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- carbon dioxide
- dioxide laser
- end cap
- laser beam
- optical fiber
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 132
- 238000007526 fusion splicing Methods 0.000 title claims description 17
- 238000000034 method Methods 0.000 title claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 258
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 129
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 129
- 238000003466 welding Methods 0.000 claims abstract description 72
- 230000004927 fusion Effects 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000007493 shaping process Methods 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 230000000712 assembly Effects 0.000 claims abstract description 12
- 238000000429 assembly Methods 0.000 claims abstract description 12
- 239000010453 quartz Substances 0.000 claims description 68
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 68
- 230000003287 optical effect Effects 0.000 claims description 15
- 238000012544 monitoring process Methods 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 11
- 238000003384 imaging method Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 238000007500 overflow downdraw method Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000010287 polarization Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
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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
- G02B6/2551—Splicing of light guides, e.g. by fusion or bonding using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/101—Scanning systems with both horizontal and vertical deflecting means, e.g. raster or XY scanners
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/105—Scanning systems with one or more pivoting mirrors or galvano-mirrors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/095—Refractive optical elements
- G02B27/0955—Lenses
-
- 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
- G02B6/2553—Splicing machines, e.g. optical fibre fusion splicer
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/10—Nuclear fusion reactors
Abstract
The invention discloses an optical fiber fusion device and a fusion method, wherein the optical fiber fusion device comprises: the light source adjusting mechanism comprises two groups of beam shaping assemblies positioned at two sides of the end cap carrier, the beam shaping assemblies comprise a carbon dioxide laser, a reflecting mirror, a focusing lens and a two-dimensional vibrating mirror structure, the carbon dioxide laser is used for generating a carbon dioxide laser beam, the reflecting mirror is used for reflecting the carbon dioxide laser beam, and the carbon dioxide laser beam passes through the focusing lens and then falls to the two-dimensional vibrating mirror structure; the two-dimensional vibrating mirror structure can adjust the rotation angle; the two-dimensional vibrating mirror structure is used for changing the direction of the carbon dioxide laser beam and enabling the carbon dioxide laser beam to be projected on a welding area of the welding surface of the end cap on the array optical fiber to form a heating area. According to the technical scheme, the two-dimensional vibrating mirror structure is utilized to adjust the spot position of the carbon dioxide laser beam falling on the welding surface, and the device has the advantages of being simple in light path structure and convenient to adjust.
Description
Technical Field
The invention relates to the technical field of optical fiber processing, in particular to an optical fiber welding device and a welding method.
Background
At present, the requirement of high-quality laser beam combination is met by welding a plurality of optical fibers which form an array with a single quartz end cap in the market, but no commercial welding machine at home can realize one-time welding of the array optical fibers and the quartz end cap.
In the similar patent technology, a plurality of microlens arrays and fourier lenses are used to shape the circular gaussian light spot emitted by a carbon dioxide laser, so as to generate a strip-shaped light spot. And heating the upper and lower parts of the target welding area of the quartz end cap through the strip-shaped light spots, so that the target welding area generates temperature, and the welding of the array optical fiber and the quartz end cap is realized.
Because the technology uses a plurality of optical lens assemblies, carbon dioxide laser and each lens can realize better beam shaping effect only by the aid of a shaft, and high mechanical installation precision or a large number of displacement angle adjusting mechanisms are required, so that the problem of complex light path adjustment exists.
Disclosure of Invention
The invention mainly aims to provide an optical fiber fusion device, which aims to solve the problem that the existing optical fiber fusion device is complex in optical path adjustment.
In order to achieve the above object, an optical fiber fusion splicing apparatus according to the present invention includes:
the array optical fiber carrier is used for fixing the array optical fibers;
the end cap carrier is used for fixing the quartz end cap;
the light source adjusting mechanism comprises two groups of beam shaping assemblies positioned at two sides of the end cap carrier, and the two groups of beam shaping assemblies are used for forming two light spots on the end cap welding surface of the quartz end cap to be welded; the beam shaping assembly comprises a carbon dioxide laser, a reflecting mirror, a focusing lens and a two-dimensional vibrating mirror structure, wherein the carbon dioxide laser is used for generating a carbon dioxide laser beam, and the reflecting mirror is used for reflecting the carbon dioxide laser beam and enabling the carbon dioxide laser beam to fall to the two-dimensional vibrating mirror structure after passing through the focusing lens; the two-dimensional vibrating mirror structure can adjust the rotation angle; the two-dimensional vibrating mirror structure is used for changing the direction of the carbon dioxide laser beam and enabling the carbon dioxide laser beam to be projected on a welding area of the welding surface of the end cap on the array optical fiber to form a heating area.
Optionally, a light emitting end of the carbon dioxide laser faces the reflecting mirror; the carbon dioxide laser is used for generating a collimated carbon dioxide laser beam; the carbon dioxide laser beam is emitted from a first reflection path of the reflecting mirror and is incident to the two-dimensional vibrating mirror structure; the focusing lens is arranged on the first reflecting path; the focusing lens is movable along the first reflective path; the carbon dioxide laser beam is emitted from a second reflection path of the two-dimensional vibrating mirror structure and falls on the welding surface of the end cap.
Optionally, the two-dimensional galvanometer assembly includes an X-galvanometer rotatable about a first axis of rotation and a Y-galvanometer rotatable about a second axis of rotation; the first rotating axis and the second rotating axis are perpendicular to each other; the X vibrating mirror is used for reflecting an incident carbon dioxide laser beam to the Y vibrating mirror, and the Y vibrating mirror is used for reflecting the incident carbon dioxide laser beam to the welding surface of the end cap.
Optionally, the incidence angle of the carbon dioxide laser beam on the end cap weld face is 65±5°.
Optionally, the optical fiber fusion device further comprises an image monitoring assembly, wherein the image monitoring assembly is used for measuring a distance value between the array optical fiber and the quartz end cap and checking whether the optical fiber end faces of the array optical fiber are flush; the image monitoring assembly comprises a first CCD camera, a second CCD camera and a third CCD camera, wherein the imaging directions of the first CCD camera and the second CCD camera are perpendicular to the optical axis of the array optical fiber, and the imaging direction of the third CCD camera is parallel to the optical axis of the array optical fiber.
Optionally, the array optical fiber carrier includes a first clamp for clamping the array optical fiber; and/or the number of the groups of groups,
the array optical fiber consists of a plurality of optical fibers; the array optical fibers are in a single column or two columns.
Optionally, the end cap carrier includes second anchor clamps and electronic five-dimensional adjustment frame, the second anchor clamps are used for the centre gripping quartz end cap, electronic five-dimensional adjustment frame with the second anchor clamps are connected, electronic five-dimensional adjustment frame is used for driving the second anchor clamps remove, realize to the five-dimensional displacement adjustment of quartz end cap.
Optionally, the end cap carrier further comprises a pressure sensor, wherein the pressure sensor is used for feeding back the contact pressure of the quartz end cap and the array optical fiber, and controlling the electric five-dimensional adjusting frame to move according to the feedback pressure.
Optionally, the optical fiber fusion device further comprises a control unit, and the control unit is electrically connected with the carbon dioxide laser, the two-dimensional galvanometer assembly, the image monitoring assembly, the electric five-dimensional adjusting frame and the pressure sensor.
The invention also provides a fusion splicing method of the optical fiber fusion splicing device, which comprises the following steps:
fixing the array optical fibers to be welded through an array optical fiber carrier, so that the array optical fibers are horizontally arranged; fixing the quartz end caps to be welded through an end cap carrier;
turning on a carbon dioxide laser to generate a carbon dioxide laser beam, and enabling the carbon dioxide laser beam to pass through a focusing lens after being reflected by a reflecting mirror so as to realize focusing;
adjusting the distance between the focusing lens and the carbon dioxide laser along the first reflection path to adjust the size of a light spot falling on the welding area;
the carbon dioxide laser beam is focused by a focusing lens and then is injected into a two-dimensional vibrating mirror structure;
the direction of the carbon dioxide laser beam is changed by utilizing a two-dimensional vibrating mirror structure and is incident to the welding surface of the end cap, and two groups of beam shaping components finally form two light spots;
the two-dimensional galvanometer structure is rotated to scan the carbon dioxide laser beam on the welding surface of the end cap, and a heating area is formed at the welding area of the welding surface of the end cap, and the light spots are used for heating the welding surface of the end cap, so that the quartz end cap and the array optical fibers are welded.
According to the technical scheme, two groups of beam shaping assemblies of the light source adjusting mechanism are adopted, two light spots are formed on the end cap welding surface of the quartz end cap to be welded, and the light spots form a heating area, so that the quartz end cap and the array optical fiber are welded. Specifically, the array optical fibers to be welded are fixed through an array optical fiber carrier, so that the array optical fibers are horizontally arranged, and the quartz end caps to be welded are fixed through an end cap carrier; then a carbon dioxide laser beam is generated by a carbon dioxide laser, and after being reflected by a reflecting mirror, the carbon dioxide laser beam passes through a focusing lens to realize focusing; the carbon dioxide laser beam is focused by a focusing lens and then is injected into a two-dimensional vibrating mirror structure; the optical path adjusting mechanism of the optical fiber fusion welding device is simple, the carbon dioxide laser and the focusing lens can achieve a good beam shaping effect without accurate shaft alignment, the requirement on the installation precision of the device is low, and the optical path adjusting operation is more convenient. And simultaneously, the two-dimensional vibrating mirror structure is utilized to adjust the emitting direction of the carbon dioxide laser beam, specifically, the emitting direction of the carbon dioxide laser beam is changed by rotating the angle of the two-dimensional vibrating mirror structure, so that the carbon dioxide laser beam finally forms two light spots on the welding surface of the quartz end cap, and the light spots are used for heating the welding surface of the end cap, so that the quartz end cap and the array optical fibers are welded. In addition, the rotation angle of the two-dimensional vibrating mirror structure can be adjusted, so that the carbon dioxide laser beam scans a heating area with any shape on the welding surface of the quartz end cap, and the device has the advantage of flexible and adjustable heating area and can adapt to the welding requirements of array optical fibers with different arrangement shapes.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of an optical fiber fusion device according to the present invention.
Fig. 2 is a partial enlarged view at a in fig. 1.
Fig. 3 is a schematic diagram of a light source adjusting mechanism of an embodiment of the optical fiber fusion device of the present invention.
Fig. 4 is a schematic structural view of a light source adjusting mechanism of an embodiment of the optical fiber fusion device of the present invention.
FIG. 5 is a schematic diagram of a two-dimensional galvanometer structure of an embodiment of an optical fiber fusion apparatus according to the present invention.
Fig. 6 is a schematic diagram of a focusing lens for adjusting the spot size according to an embodiment of the optical fiber fusion device of the present invention.
FIG. 7 is a schematic view of an embodiment of an optical fiber fusion device according to the present invention.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 1 | Array optical fiber carrier | 2 | End cap carrier |
| 3 | Light source adjusting mechanism | 31 | Beam shaping assembly |
| 311 | Carbon dioxide laser | 312 | Reflecting mirror |
| 313 | Focusing lens | 314 | Two-dimensional vibrating mirror structure |
| 3141 | X-ray vibrating mirror | 3142 | Y vibrating mirror |
| 4 | Image monitoring assembly | 41 | First CCD camera |
| 42 | Second CCD camera | 43 | Third CCD camera |
| 5 | Pressure sensor | 6 | Quartz end cap |
| 7 | Array optical fiber | 8 | Heating zone |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if a directional indication (such as up, down, left, right, front, and rear … …) is involved in the embodiment of the present invention, the directional indication is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional indication is correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B "including a scheme, or B scheme, or a scheme where a and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides an optical fiber fusion welding device.
Referring to fig. 1 to 7, in an embodiment of the present invention, the optical fiber fusion device includes an array optical fiber 7 carrier 1, an end cap carrier 2, and a light source adjusting mechanism 3; the array optical fiber 7 carrier 1 is used for fixing the array optical fiber 7; the end cap carrier 2 is used for fixing a quartz end cap 6; the light source adjusting mechanism 3 comprises two groups of beam shaping assemblies 31 positioned on two sides of the end cap carrier 2, and the two groups of beam shaping assemblies 31 are used for forming two light spots on the end cap welding surface of the quartz end cap 6 to be welded; the beam shaping assembly 31 comprises a carbon dioxide laser 311, a reflector 312, a focusing lens 313 and a two-dimensional galvanometer structure 314, wherein the carbon dioxide laser 311 is used for generating a carbon dioxide laser beam, the reflector 312 is used for reflecting the carbon dioxide laser beam, and the carbon dioxide laser beam passes through the focusing lens 313 and then falls on the two-dimensional galvanometer structure 314; the two-dimensional galvanometer structure 314 can adjust the rotation angle; the two-dimensional galvanometer structure 314 is used to redirect the carbon dioxide laser beam and project the carbon dioxide laser beam onto the fused area of the end cap fused face at the array fiber 7 to form the heated area 8.
By adopting two groups of beam shaping components 31 of the light source adjusting mechanism 3, two light spots are formed on the end cap welding surface of the quartz end cap 6 to be welded, and the light spots form a heating area 8, so that the quartz end cap 6 and the array optical fiber 7 are welded. Specifically, the array optical fibers 7 to be fused are fixed by the array optical fiber 7 carrier 1, so that the array optical fibers 7 are horizontally arranged, and the quartz end caps 6 to be fused are fixed by the end cap carrier 2; then the carbon dioxide laser 311 is utilized to generate a carbon dioxide laser beam, and the carbon dioxide laser beam passes through the focusing lens 313 to realize focusing after being reflected by the reflecting mirror 312; after being focused by the focusing lens 313, the carbon dioxide laser beam is injected into the two-dimensional vibrating mirror structure 314; the optical path adjusting mechanism of the optical fiber fusion splicing device is simple, the carbon dioxide laser and the focusing lens 313 can realize a better beam shaping effect without the need of accurate shaft alignment, the requirement on the installation precision of the device is lower, and the optical path adjusting operation is more convenient. Simultaneously, the two-dimensional vibrating mirror structure 314 is utilized to adjust the emitting direction of the carbon dioxide laser beam, specifically, the emitting direction of the carbon dioxide laser beam is changed by rotating the angle of the two-dimensional vibrating mirror structure 314, so that the carbon dioxide laser beam finally forms two light spots on the welding surface of the quartz end cap 6, and the light spots are used for heating the welding surface of the end cap, so that the quartz end cap 6 and the array optical fiber 7 are welded.
If the light spots are two strip-shaped light spots, the upper part and the lower part of the welding area of the quartz end cap 6 are heated by the two strip-shaped light spots, so that the target welding area generates heating temperature, and the welding of the array optical fiber 7 and the quartz end cap 6 is realized; but generates a strip-shaped light spot on the welding surface, which is only suitable for welding the linear array optical fiber 7 and the quartz end cap 6, and if the array optical fiber 7 is circular or other arrangement shape, the welding effect is poor; therefore, by adjusting the rotation angle of the two-dimensional vibrating mirror structure 314, the light spot of the carbon dioxide laser beam falling on the welding surface of the quartz end cap 6 moves to scan the heating area 8 with any shape, and the device has the advantage of flexibility and adjustability and can adapt to the welding requirements of the array optical fibers 7 with different arrangement shapes.
Optionally, the light emitting end of the carbon dioxide laser 311 is directed toward the mirror 312; the carbon dioxide laser 311 is used to generate a collimated carbon dioxide laser beam; the carbon dioxide laser beam exits the first reflection path of the mirror 312 and is incident on the two-dimensional galvanometer structure 314; the focusing lens 313 is disposed on the first reflection path; the focusing lens 313 is movable along a first reflection path; the carbon dioxide laser beam exits the second reflective path of the two-dimensional galvanometer structure 314 and falls on the end cap weld face.
The reflector 312 has the functions of folding the light path and compressing the volume of the device; the focusing lens 313 is used for focusing the carbon dioxide laser beam, the position of the focusing lens 313 can move along the first reflection path, and the size of the light spot acting on the welding surface of the quartz end cap 6 to be welded is changed along with the position of the focusing lens 313, so that the purpose of adjusting the light spot size is achieved. Specifically, the collimated and parallel carbon dioxide laser beams vertically enter the focusing lens 313 to focus one beam of light at one point, when the two-dimensional galvanometer structure 314 is positioned at the focal position of the focusing lens 313, the light spot formed by the carbon dioxide laser beams is minimum at the focal position, the light intensity of the carbon dioxide laser beams is obviously enhanced, and the light intensity reaches extremely high value; by changing the distance between the focusing lens 313 and the two-dimensional galvanometer structure 314, the focusing lens 313 is far away from the two-dimensional galvanometer structure 314, and the light spot can be enlarged.
Optionally, the two-dimensional galvanometer assembly includes an X-galvanometer 3141 and a Y-galvanometer 3142, the X-galvanometer 3141 being rotatable about a first axis of rotation and the Y-galvanometer 3142 being rotatable about a second axis of rotation; the first rotating axis and the second rotating axis are perpendicular to each other; the X galvanometer 3141 is used to reflect the incident carbon dioxide laser beam to the Y galvanometer 3142, and the Y galvanometer 3142 is used to reflect the incident carbon dioxide laser beam to the end cap weld face.
The X vibrating mirror 3141 comprises a first rotating mechanism and a first mirror surface, the Y vibrating mirror 3142 comprises a second rotating mechanism and a second mirror surface, the first rotating mechanism is used for driving the first mirror surface to rotate around a first rotating axis, the second rotating mechanism is used for driving the second mirror surface to rotate around a second rotating axis, the first mirror surface and the second mirror surface are used for reflecting laser beams, and the light spots fall on different positions of the welding surface of the end cap by adjusting the angles of the first mirror surface and the second mirror surface. In addition, cylindrical microlenses may be added to form homogenized bar-shaped spots and semi-rectangular or semicircular spots. It should be noted that the first mirror, the second mirror, and the reflecting mirror 312 are all plane mirrors.
Alternatively, the angle of incidence of the carbon dioxide laser beam at the end cap weld face is 65±5°.
If the carbon dioxide laser beam is directly irradiated on the welding surface of the quartz end cap 6, part of laser energy can not be absorbed by the quartz end cap 6 due to interface reflection, so that energy loss is caused; moreover, if the reflected laser energy is absorbed by the array fiber 7 to be fusion-spliced, it also affects the array fiber 7; the incidence angle of the carbon dioxide laser beam on the welding surface of the end cap is 65 degrees, so that P polarized light is formed, and the optical Brewster's law is satisfied, namely, when the carbon dioxide laser beam has a specific polarization direction and incidence angle, the maximum transmission absorption rate and the minimum reflection loss are realized on the welding surface. According to the optical fiber fusion splicing device, the polarization direction (P polarization) and the incidence angle (Brewster angle) of the laser beam incident on the fusion splicing surface of the quartz end cap 6 are controlled, so that the energy lost by the laser energy due to interface reflection is greatly reduced, the energy utilization rate is improved, and the influence of the laser reflected by the quartz end cap 6 on the array optical fiber 7 to be fused is avoided.
Optionally, the optical fiber fusion splicing device further comprises an image monitoring assembly 4, wherein the image monitoring assembly 4 is used for measuring the distance value between the array optical fiber 7 and the quartz end cap 6 and checking whether the optical fiber end faces of the array optical fiber 7 are flush; the image monitoring assembly 4 comprises a first CCD camera 41, a second CCD camera 42 and a third CCD camera 43, wherein the imaging directions of the first CCD camera 41 and the second CCD camera 42 are perpendicular to the optical axis of the array optical fiber 7, and the imaging direction of the third CCD camera 43 is parallel to the optical axis of the array optical fiber 7.
A telecentric lens can be used by using a CCD camera, and a proper view field and an illumination light source are needed; imaging the array optical fiber 7 and the quartz end cap 6 by using a first CCD camera 41 and a second CCD camera 42, detecting whether the end faces of the optical fibers of the array optical fiber 7 are flush, and detecting whether the optical fibers are horizontal by using a third CCD camera 43; the array fiber 7 carrier 1 and the end cap carrier 2 are then adjusted to complete alignment and pitch measurement of the array fiber 7 and the quartz end cap 6.
Optionally, the array fiber 7 carrier 1 comprises a first clamp for clamping the array fiber 7; the array fiber 7 is composed of a plurality of optical fibers.
The first clamp is used for clamping the array optical fibers 7 to achieve the purpose of fixation, a plurality of optical fibers can form round or irregular arrangement shapes, and the heating area 8 is more flexible and adjustable by utilizing the two groups of beam shaping assemblies 31, so that the welding requirements of the array optical fibers 7 with different shapes can be met.
Optionally, the end cap carrier 2 comprises a second clamp and an electric five-dimensional adjusting frame, the second clamp is used for clamping the quartz end cap 6, the electric five-dimensional adjusting frame is connected with the second clamp, and the electric five-dimensional adjusting frame is used for driving the second clamp to move so as to realize five-dimensional displacement adjustment of the quartz end cap 6.
The second clamp is used for clamping the quartz end cap 6, and the position of the second clamp is adjusted by utilizing the electric five-dimensional adjusting frame, so that five-dimensional displacement adjustment of the quartz end cap 6 is realized.
Optionally, the end cap carrier 2 further comprises a pressure sensor 5, and the pressure sensor 5 is used for feeding back the contact pressure of the quartz end cap 6 and the array optical fiber 7 and controlling the electric five-dimensional adjusting frame to move according to the feedback pressure.
And the pressure sensor 5 is used for feeding back the contact pressure between the quartz end cap 6 and the array optical fiber 7, and then the electric five-dimensional adjusting frame is controlled to drive the second clamp to move according to the acquired feedback pressure, so that the quartz end cap 6 is aligned with the array optical fiber 7, and the welding quality is improved.
Optionally, the optical fiber fusion device further comprises a control unit, and the control unit is electrically connected with the carbon dioxide laser 311, the two-dimensional galvanometer assembly, the image monitoring assembly 4, the electric five-dimensional adjusting frame and the pressure sensor 5.
The control unit comprises a computer, and the first CCD camera 41, the second CCD camera 42 and the third CCD camera 43 are controlled by the computer to image the array optical fiber 7 and the quartz endcap 6; the contact pressure of the quartz end cap 6 and the array optical fiber 7 is fed back to the computer by the pressure sensor 5, and the computer controls the electric five-dimensional adjusting frame to drive the second clamp to move according to the feedback pressure; turning on a carbon dioxide laser 311 by a computer to generate a collimated carbon dioxide laser beam, and reflecting the carbon dioxide laser beam by a reflector 312 and passing through a focusing lens 313 to realize focusing; the X vibrating mirror 3141 and the Y vibrating mirror 3142 are regulated by a computer to excite and rotate, so that after the carbon dioxide laser beams are reflected by the X vibrating mirror 3141 and the Y vibrating mirror 3142, the directions of the carbon dioxide laser beams are changed and the carbon dioxide laser beams are incident to the welding surface of the end cap, two light spots are finally formed, and the control precision of the optical fiber welding device can be improved by computer control, so that the welding quality is improved.
The distance between the focusing lens 313 and the carbon dioxide laser 311 is adjusted along the first reflection path by the control unit to adjust the spot size falling on the welding area
The invention also provides a fusion splicing method of the optical fiber fusion splicing device, which comprises the following steps:
fixing the array optical fibers 7 to be welded through the array optical fiber 7 carrier 1, so that the array optical fibers 7 are horizontally arranged; the quartz end cap 6 to be welded is fixed through the end cap carrier 2;
turning on the carbon dioxide laser 311 to generate a carbon dioxide laser beam, and reflecting the carbon dioxide laser beam by the mirror 312 to pass through the focusing lens 313 to achieve focusing;
adjusting the distance between the focusing lens 313 and the carbon dioxide laser 311 along the first reflection path to adjust the spot size falling on the welding area;
after being focused by the focusing lens 313, the carbon dioxide laser beam is injected into the two-dimensional vibrating mirror structure 314;
the two-dimensional vibrating mirror structure 314 is utilized to change the direction of the carbon dioxide laser beam to be incident on the welding surface of the end cap, and the two groups of beam shaping components 31 finally form two light spots;
the two-dimensional galvanometer structure 314 is rotated to scan the carbon dioxide laser beam on the end cap fusion face, and the heating area 8 formed at the fusion area of the end cap fusion face is used for heating the end cap fusion face by the light spot, so that fusion of the quartz end cap 6 and the array optical fiber 7 is realized.
In another embodiment, a fusion method of an optical fiber fusion device includes the steps of:
fixing the array optical fibers 7 to be welded through the array optical fiber 7 carrier 1, so that the array optical fibers 7 are horizontally arranged; the quartz end cap 6 to be welded is fixed through the end cap carrier 2;
the first CCD camera 41, the second CCD camera 42 and the third CCD camera 43 are controlled by the control unit to image the array optical fiber 7 and the quartz end cap 6, whether the optical fiber end faces of the array optical fiber 7 are flush or not is checked, and the array optical fiber 7 and the quartz end cap 6 are aligned by adjusting the carrier 1 of the array optical fiber 7 and the carrier 2 of the end cap;
the contact pressure of the quartz end cap 6 and the array optical fiber 7 is fed back to the control unit by the pressure sensor 5, and the control unit controls the electric five-dimensional adjusting frame to drive the second clamp to move according to the feedback pressure;
turning on the carbon dioxide laser 311 by using a control unit to generate a collimated carbon dioxide laser beam, and reflecting the carbon dioxide laser beam by a mirror 312 and passing through a focusing lens 313 to achieve focusing;
adjusting the distance between the focusing lens 313 and the carbon dioxide laser 311 along the first reflection path by using the control unit to adjust the size of the light spot falling on the welding area;
after being focused by the focusing lens 313, the carbon dioxide laser beam is injected into the two-dimensional vibrating mirror structure 314;
the X vibrating mirror 3141 and the Y vibrating mirror 3142 are regulated by a control unit to rotate, so that after the carbon dioxide laser beams are reflected by the X vibrating mirror 3141 and the Y vibrating mirror 3142, the carbon dioxide laser beams are incident on the welding surface of the end cap in a direction changing manner, and finally two light spots are formed;
the quartz end cap 6 is fused with the array optical fiber 7 by rotating the X-galvanometer 3141 and the Y-galvanometer 3142 to scan the carbon dioxide laser beam over the end cap fusion face, and the spot of the heating area 8 formed at the fusion area of the end cap fusion face is used to heat the end cap fusion face.
According to the technical scheme, two groups of beam shaping assemblies 31 of the light source adjusting mechanism 3 are adopted, two light spots are formed on the end cap welding surface of the quartz end cap 6 to be welded, and the light spots form a heating area 8, so that the quartz end cap 6 and the array optical fibers 7 are welded. Specifically, the array optical fibers 7 to be fused are fixed by the array optical fiber 7 carrier 1, so that the array optical fibers 7 are horizontally arranged, and the quartz end caps 6 to be fused are fixed by the end cap carrier 2; then the carbon dioxide laser 311 is utilized to generate a carbon dioxide laser beam, and the carbon dioxide laser beam passes through the focusing lens 313 to realize focusing after being reflected by the reflecting mirror 312; after being focused by the focusing lens 313, the carbon dioxide laser beam is injected into the two-dimensional vibrating mirror structure 314; the optical path adjusting mechanism of the optical fiber fusion splicing device is simple, the carbon dioxide laser and the focusing lens 313 can realize a better beam shaping effect without the need of accurate shaft alignment, the requirement on the installation precision of the device is lower, and the optical path adjusting operation is more convenient. Simultaneously, the two-dimensional vibrating mirror structure 314 is utilized to adjust the emitting direction of the carbon dioxide laser beam, specifically, the emitting direction of the carbon dioxide laser beam is changed by rotating the angle of the two-dimensional vibrating mirror structure 314, so that the carbon dioxide laser beam finally forms two light spots on the welding surface of the quartz end cap 6, and the light spots are used for heating the welding surface of the end cap, so that the quartz end cap 6 and the array optical fiber 7 are welded. In addition, the rotation angle of the two-dimensional vibrating mirror structure 314 can be adjusted, so that the carbon dioxide laser beam scans the heating area 8 with any shape on the welding surface of the quartz end cap 6, and the array optical fiber 7 welding requirements of different arrangement shapes can be met.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather, the equivalent structural changes made by the description and drawings of the present invention or the direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (10)
1. An optical fiber fusion splicing apparatus, comprising:
the array optical fiber carrier is used for fixing the array optical fibers;
the end cap carrier is used for fixing the quartz end cap;
the light source adjusting mechanism comprises two groups of beam shaping assemblies positioned at two sides of the end cap carrier, and the two groups of beam shaping assemblies are used for forming two light spots on the end cap welding surface of the quartz end cap to be welded; the beam shaping assembly comprises a carbon dioxide laser, a reflecting mirror, a focusing lens and a two-dimensional vibrating mirror structure, wherein the carbon dioxide laser is used for generating a carbon dioxide laser beam, and the reflecting mirror is used for reflecting the carbon dioxide laser beam and enabling the carbon dioxide laser beam to fall to the two-dimensional vibrating mirror structure after passing through the focusing lens; the two-dimensional vibrating mirror structure can adjust the rotation angle; the two-dimensional vibrating mirror structure is used for changing the direction of the carbon dioxide laser beam and enabling the carbon dioxide laser beam to be projected on a welding area of the welding surface of the end cap on the array optical fiber to form a heating area.
2. The optical fiber fusion splice device of claim 1, wherein the light emitting end of the carbon dioxide laser is directed toward the mirror; the carbon dioxide laser is used for generating a collimated carbon dioxide laser beam; the carbon dioxide laser beam is emitted from a first reflection path of the reflecting mirror and is incident to the two-dimensional vibrating mirror structure; the focusing lens is arranged on the first reflecting path; the focusing lens is movable along the first reflective path; the carbon dioxide laser beam is emitted from a second reflection path of the two-dimensional vibrating mirror structure and falls on the welding surface of the end cap.
3. The optical fiber fusion splice device of claim 1, wherein the two-dimensional galvanometer assembly includes an X-galvanometer rotatable about a first axis of rotation and a Y-galvanometer rotatable about a second axis of rotation; the first rotating axis and the second rotating axis are perpendicular to each other; the X vibrating mirror is used for reflecting an incident carbon dioxide laser beam to the Y vibrating mirror, and the Y vibrating mirror is used for reflecting the incident carbon dioxide laser beam to the welding surface of the end cap.
4. The optical fiber fusion splice device of claim 1, wherein the angle of incidence of the carbon dioxide laser beam at the end cap fusion face is 65±5°.
5. The fusion splice device of any of claims 1-4, further comprising an image monitoring assembly for measuring a distance value between the array optical fibers and the quartz endcaps and checking if fiber end faces of the array optical fibers are flush; the image monitoring assembly comprises a first CCD camera, a second CCD camera and a third CCD camera, wherein the imaging directions of the first CCD camera and the second CCD camera are perpendicular to the optical axis of the array optical fiber, and the imaging direction of the third CCD camera is parallel to the optical axis of the array optical fiber.
6. The fusion splice device of claim 5, wherein the array fiber carrier includes a first clamp for clamping the array fiber; and/or the number of the groups of groups,
the array optical fiber consists of a plurality of optical fibers; the array optical fibers are in a single column or two columns.
7. The optical fiber fusion splice device of claim 6, wherein the end cap carrier includes a second clamp for clamping the quartz end cap and an electric five-dimensional adjustment frame connected to the second clamp for driving the second clamp to move for five-dimensional displacement adjustment of the quartz end cap.
8. The fusion splice device of claim 7, wherein the end cap carrier further comprises a pressure sensor for feeding back contact pressure of the quartz end cap with the array optical fibers and controlling movement of the motorized five-dimensional adjustment frame based on the feedback pressure.
9. The fusion splice method of an optical fiber fusion splice device according to claim 8, further comprising a control unit electrically coupled to the carbon dioxide laser, the two-dimensional galvanometer assembly, the image monitoring assembly, the motorized five-dimensional adjustment bracket, and the pressure sensor.
10. A fusion splicing method of an optical fiber fusion splicing device, comprising the steps of:
fixing the array optical fibers to be welded through an array optical fiber carrier, so that the array optical fibers are horizontally arranged; fixing the quartz end caps to be welded through an end cap carrier;
turning on a carbon dioxide laser to generate a carbon dioxide laser beam, and enabling the carbon dioxide laser beam to pass through a focusing lens after being reflected by a reflecting mirror so as to realize focusing;
adjusting the distance between the focusing lens and the carbon dioxide laser along the first reflection path to adjust the size of a light spot falling on the welding area;
the carbon dioxide laser beam is focused by a focusing lens and then is injected into a two-dimensional vibrating mirror structure;
the direction of the carbon dioxide laser beam is changed by utilizing a two-dimensional vibrating mirror structure and is incident to the welding surface of the end cap, and two groups of beam shaping components finally form two light spots;
the two-dimensional galvanometer structure is rotated to scan the carbon dioxide laser beam on the welding surface of the end cap, and a heating area is formed at the welding area of the welding surface of the end cap, and the light spots are used for heating the welding surface of the end cap, so that the quartz end cap and the array optical fibers are welded.
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| CN202310986596.6A CN117130096A (en) | 2023-08-07 | 2023-08-07 | Optical fiber fusion splicing device and fusion splicing method |
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| CN202310986596.6A CN117130096A (en) | 2023-08-07 | 2023-08-07 | Optical fiber fusion splicing device and fusion splicing method |
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