CN115857119A - Optical fiber coupling structure and coupling welding process thereof - Google Patents
Optical fiber coupling structure and coupling welding process thereof Download PDFInfo
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- CN115857119A CN115857119A CN202211655266.0A CN202211655266A CN115857119A CN 115857119 A CN115857119 A CN 115857119A CN 202211655266 A CN202211655266 A CN 202211655266A CN 115857119 A CN115857119 A CN 115857119A
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Abstract
The invention belongs to the technical field of coupling structures of laser equipment, and particularly relates to an optical fiber coupling structure and a coupling welding process thereof. Comprises a base, an adjusting sleeve and an optical fiber connector; the base is provided with a light-emitting hole, the diameter of one end of the light-emitting hole is increased to form a limiting hole, and the light-emitting hole and the limiting hole are coaxial; the adjusting sleeve is sleeved on the optical fiber connector, one end of the adjusting sleeve, which faces the base, is provided with an annular positioning part, and the annular positioning part is abutted against the base; the optical fiber connector is inserted from the adjusting sleeve and abuts against the bottom of the limiting hole. This application carries out prepositioning and pre-protection as the setting element through utilizing base and location ring structure, just can carry out accurate location to the axial of optic fibre in carrying out the initial assembly process, carries out coarse positioning to the vertical plane parallel direction of axis, effectively shortens later stage coupling equipment and is just looking for the time of light, not only simple high efficiency but also can use multidirectional coupling welding process.
Description
Technical Field
The invention belongs to the technical field of coupling structures of laser equipment, and particularly relates to an optical fiber coupling structure and a coupling welding process thereof.
Background
The superradiance light emitting diode light source is an excellent laser light source, because the radiated light is close to the diffraction limit in space, namely, the space coherence and the light beam quality are high, the superradiance light emitting diode light source is easy to be coupled into an optical fiber, but the defect is that the insertion loss requirement of the application environment is very high, the traditional plane coupling structure is shown in figure 1, and the process needs to simultaneously debug and align at least three space directions on the light axial direction and the axis vertical plane simultaneously to perform the work of light modulation, correction, welding and the like, not only the operation is complex and the precision cannot meet the control requirement of industrial-grade temperature application, but also in the process of calibrating the axial distance between the optical fiber and the laser, the optical fiber is easy to abut against a base or the laser in the adjusting process, the performance or the precision of the optical fiber and the laser is directly influenced, on the other hand, because a fastening piece is needed to fix an optical fiber head on the base, the welding is generally performed in a mode of oblique welding of 45 degrees at two sides, the deformation perpendicular to the welding plane direction cannot be controlled, the deformation of the optical fiber which leads to the alignment and the displacement of the well-debugged optical fiber is easy to occur after welding, and the performance and the existing coupling structure and the performance and the process are difficult to increase the requirements of the quality of the industrial-grade laser under the requirements of the process and the quality of the laser.
Disclosure of Invention
The invention aims to provide an optical fiber coupling structure which is more convenient to couple, has higher coupling precision and operation efficiency and can effectively prevent the problems of deviation and the like caused by thermal deformation after welding based on actual requirements and a coupling welding process thereof.
In order to achieve the purpose, the invention adopts the following technical scheme.
An optical fiber coupling structure comprises a base 1, an adjusting sleeve 2 and an optical fiber connector 3;
the base 1 is provided with a light-emitting hole 1a, the diameter of one end of the light-emitting hole 1a is increased to form a limiting hole 1b, and the light-emitting hole 1a and the limiting hole 1b are coaxial;
the adjusting sleeve 2 is sleeved on the optical fiber connector 3, one end of the adjusting sleeve 2 facing the base 1 is provided with an annular positioning part 20, and the annular positioning part 20 props against the base 1;
the optical fiber connector 3 is inserted from the adjusting sleeve 2 and abuts against the bottom of the limiting hole 1 b.
In a further improvement or preferred mode of the aforementioned L-shaped optical fiber coupling structure, the base 1 is L-shaped, the light exit hole 1a is disposed on a vertical arm portion of the L-shape, and the cross arm portion of the base 1 is disposed with the laser 4, which is opposite to the light exit hole 1 a.
In a further improvement or preferred mode of the aforementioned L-shaped fiber coupling structure, the L-shaped fiber coupling structure further includes a laser 4, and the laser is disposed on the axes of the light outlet 1a and the limiting hole 1 b.
In a further improvement or preferred mode of the L-shaped optical fiber coupling structure, the L-shaped optical fiber coupling structure further comprises a laser 4, the laser 4 is arranged at the hole of the light outlet 1a, and the depth of the limiting hole 1b is not less than the extension length of light at the front end of the optical fiber connector 3.
In a further improvement or preferred mode of the L-shaped optical fiber coupling structure, a distance between the inner wall of the limiting hole 1b and the outer wall of the optical fiber connector 3 is not less than a distance between the inner wall of the light exit hole 1a and the optical fiber.
An optical fiber coupling welding process comprises the following steps:
s1, mounting a laser 4 on the front side of a light outlet 1 a;
s2, inserting the optical fiber connector 3 into the adjusting sleeve 2, S3, aligning the adjusting sleeve 2 to the limiting hole 1b, shuttling the optical fiber connector 3 to be inserted into the limiting hole 1b until the front edge of the optical fiber connector abuts against the bottom of the limiting hole 1b, and simultaneously inserting the optical fiber at the front end of the optical fiber connector 3 into the light outlet hole 1 a;
s4, welding the rear end of the adjusting sleeve 2 and the connecting area of the optical fiber connector 3, and fixing the relative position of the adjusting sleeve 2 and the optical fiber connector 3;
s4, controlling the laser 4 to emit signal light, and adjusting the position of the adjusting sleeve 2 to enable the light to look for the light emitting direction of the laser 4;
and S5, after the light emitting direction is found, welding the adjusting sleeve 2 and the base 1 by utilizing a three-way 120-degree welding process.
And supplementing or improving the optical fiber coupling welding process, wherein the step S2 further comprises trimming the optical fiber connector 3 to ensure that the extension length of the optical fiber at the front end of the optical fiber connector 3 does not exceed the depth of the light outlet hole 1 a.
The optical fiber coupling welding process is further supplemented or improved, the optical fiber coupling welding process further comprises a circuit board 5, and the base 1 is an L-shaped base; the circuit board 5 is fixed on the L-shaped base, the laser 4 is attached to a chip bonding pad reserved on the circuit board 5, and the size of the chip bonding pad is consistent with that of a chip.
And the optical fiber coupling welding process is further supplemented or improved, and if the light falling phenomenon occurs, the optical signal is obtained by adjusting and welding the welding position of the rear end of the adjusting sleeve 2 and the optical fiber connector 3 by laser.
And further supplementing or improving the optical fiber coupling welding process, the adjusting sleeve 2 and the optical fiber connector 3 are welded by penetration welding, and the adjusting sleeve 2 and the base 1 are welded by three paths of 120-degree inclined welding.
The beneficial effects are that:
the utility model provides an optical fiber coupling structure, for current coupling structure, through utilizing base and location ring structure to carry out prepositioning and pre-protection as the setting element, just can carry out accurate location to the axial of optic fibre in carrying out initial assembly process, the countershaft vertical plane parallel direction carries out thick location, on the one hand this structure effectively shortens later stage coupling equipment and is just looking for the time of light, on the other hand effectively prevents to take place to contact between optic fibre and laser instrument and the base in whole coupling process, effectively improve the stability of product, the final light of looking for of this structure is simultaneously adjusted concentrating on the axial vertical plane on, not only simple high efficiency but also can use the higher multidirectional coupling welding process of precision to generally adopt coaxial encapsulation three light beam each other to become 120 orientation laser welding process, effectively prevent certain thermal deformation and skew because of unbalanced welding machine arouses, this structure has good repairability and controllability simultaneously, if take place polarisation scheduling problem because of various reasons during the use, can be convenient weld through the adjustment and reset the adjustment.
Drawings
FIG. 1 is a schematic diagram of a conventional coupling structure;
fig. 2 is a schematic view of the optical fiber coupling mechanism of the present application.
Detailed Description
The present invention will be described in detail with reference to specific examples.
As shown in fig. 1, in the conventional optical fiber coupling structure, it is necessary to move the optical fiber back and forth to find light for x-direction axial positioning, then perform z-direction and y-direction positioning, and finally perform welding, although it seems simple, the precision requirement is high, the optical fiber and the laser are strictly limited for contact and interference, the actual alignment efficiency is very low, and due to the defects of the structure and the welding process, the welded coupling structure still generates deviation, so the quality and performance of the product are difficult to further improve. To solve this problem.
The invention improves the existing optical fiber coupling structure, simplifies the structure, improves the coupling efficiency of the optical fiber and the laser, reduces the coupling difficulty, utilizes the base and the positioning ring structure as the positioning piece to carry out pre-positioning and pre-protection, effectively prevents the interference between the optical fiber and the laser or the base, and provides a coupling method which can apply the multi-directional welding processes of laser welding and the like with three coaxially packaged beams in a direction of 120 degrees mutually based on the structural improvement, so that the coupling method can realize multi-directional welding, realize the stress balance of each direction of the welding, prevent the optical fiber from displacing in the welding process, ensure the alignment effectiveness, and simultaneously provides a simple resetting method after later light deflection based on the structure, thereby further prolonging the service life of the structure.
As shown in fig. 2, the optical fiber coupling structure of the present application includes a base 1, an adjusting sleeve 2, and an optical fiber connector 3; the base 1 is provided with a light-emitting hole 1a, the diameter of one end of the light-emitting hole 1a is increased to form a limiting hole 1b, and the light-emitting hole 1a and the limiting hole 1b are coaxial; the adjusting sleeve 2 is sleeved on the optical fiber connector 3, one end of the adjusting sleeve 2 facing the base 1 is provided with an annular positioning part 20, and the annular positioning part 20 props against the base 1; the optical fiber connector 3 is inserted from the adjusting sleeve 2 and abuts against the bottom of the limiting hole 1 b.
In the application, the axial positioning of the optical fiber is realized by setting the limiting hole and using the hole bottom and the front end face of the optical fiber connector as the limiting face, the outer wall of the optical fiber connector and the inner wall of the limiting hole are used as the limiting face to realize the pre-positioning in the direction of the vertical face of the shaft, further, the rapid positioning of the optical fiber and the laser in the axial direction is realized, and the vertical primary positioning of the shaft is realized at the same time.
In the present embodiment, the base 1 is L-shaped, the light-emitting hole 1a is disposed on the vertical arm portion of the L-shape, the laser 4 is disposed on the horizontal arm portion of the base 1, the laser is opposite to the light-emitting hole 1a, and the laser is disposed on the axis of the light-emitting hole 1a and the limiting hole 1 b.
Wherein, the depth of the limiting hole 1b is not less than the extension length of the front light of the optical fiber joint 3 to prevent the laser from contacting with the optical fiber
In order to realize the limiting control, the distance between the inner wall of the limiting hole 1b and the outer wall of the light connector 3 is not less than the distance between the inner wall of the light outlet hole 1a and the optical fiber.
The optical fiber coupling structure is based on the following welding process and comprises the following steps:
s1, mounting a laser 4 on the front side of a light outlet 1 a;
s2, trimming the optical fiber connector 3 to ensure that the extension length of the optical fiber at the front end of the optical fiber connector 3 does not exceed the depth of the light outlet hole 1a, inserting the optical fiber connector 3 into the adjusting sleeve 2, S3, aligning the adjusting sleeve 2 with the limiting hole 1b, shuttling the optical fiber connector 3 into the limiting hole 1b until the front edge of the optical fiber connector abuts against the bottom of the limiting hole 1b, and simultaneously inserting the optical fiber at the front end of the optical fiber connector 3 into the light outlet hole 1 a;
s4, welding penetration welding is carried out on the connection area between the rear end of the adjusting sleeve 2 and the optical fiber connector 3, three paths of 120-degree oblique welding are carried out between the adjusting sleeve 2 and the base 1, and the relative position of the adjusting sleeve 2 and the optical fiber connector 3 is fixed;
s4, controlling the laser 4 to emit signal light, and adjusting the position of the adjusting sleeve 2 to enable the light to look for the light emitting direction of the laser 4;
and S5, after the light emitting direction is found, welding the adjusting sleeve 2 and the base 1 by utilizing a three-way 120-degree welding process.
And S6, if the light falling phenomenon occurs, adjusting the welding position of the rear end of the adjusting sleeve 2 and the optical fiber connector 3 through laser to weld and retrieve the optical signal.
In particular implementations, to facilitate circuit connections, the circuit board 5 is also arranged, and the base 1 is an L-shaped base; the circuit board 5 is fixed on the L-shaped base, the laser 4 is attached to a chip bonding pad reserved on the circuit board 5, and the size of the chip bonding pad is consistent with that of a chip.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. An optical fiber coupling structure is characterized by comprising a base (1), an adjusting sleeve (2) and an optical fiber connector (3);
the base (1) is provided with a light-emitting hole (1 a), the diameter of one end of the light-emitting hole (1 a) is increased to form a limiting hole (1 b), and the light-emitting hole (1 a) and the limiting hole (1 b) are coaxial;
the adjusting sleeve (2) is sleeved on the optical fiber connector (3), one end of the adjusting sleeve (2) facing the base (1) is provided with an annular positioning part (20), and the annular positioning part (20) abuts against the base (1);
the optical fiber connector (3) is inserted from the adjusting sleeve (2) and abuts against the bottom of the limiting hole (1 b).
2. Optical fiber coupling structure according to claim 1, wherein the base (1) is L-shaped, the light exit hole (1 a) is provided at a vertically disposed arm portion of the L-shape, and the cross arm portion of the base (1) is provided with a laser (4) which is directly opposite to the light exit hole (1 a).
3. The optical fiber coupling structure according to claim 1, further comprising a laser (4) disposed on the axis of the light exit port (1 a) and the limiting hole (1 b).
4. The optical fiber coupling structure according to claim 1, further comprising a laser (4), wherein the laser (4) is disposed at the aperture of the light outlet (1 a), and the depth of the limiting hole (1 b) is not less than the protruding length of the light at the front end of the optical fiber connector (3).
5. The optical fiber coupling structure according to claim 1, wherein the distance between the inner wall of the limiting hole (1 b) and the outer wall of the optical fiber connector (3) is not less than the distance between the inner wall of the light outlet hole (1 a) and the optical fiber.
6. An optical fiber coupling welding process for any one of claims 1 to 5, comprising the steps of:
s1, mounting a laser (4) on the front side of a light outlet (1 a);
s2, inserting the optical fiber connector (3) into the adjusting sleeve (2), S3, aligning the adjusting sleeve (2) to the limiting hole (1 b), shuttling the optical fiber connector (3) to enable the optical fiber connector to be inserted into the limiting hole (1 b) until the front edge of the optical fiber connector abuts against the bottom of the limiting hole (1 b), and simultaneously inserting the optical fiber at the front end of the optical fiber connector (3) into the light outlet hole (1 a);
s4, welding the rear end of the adjusting sleeve (2) and the connecting area of the optical fiber connector (3), and fixing the relative position of the adjusting sleeve (2) and the optical fiber connector (3);
s4, controlling the laser (4) to emit signal light, and adjusting the position of the adjusting sleeve (2) to enable the light to look for the light emitting direction of the laser (4);
and S5, after the light emitting direction is found, welding the adjusting sleeve (2) and the base (1) by utilizing a three-way 120-degree welding process.
7. The fiber coupling welding process according to claim 6, wherein the step S2 further comprises trimming the fiber joint (3) so that the fiber protrusion length at the front end of the fiber joint (3) does not exceed the depth of the light outlet hole (1 a).
8. The fiber-coupled soldering process according to claim 6, further comprising a circuit board (5), wherein the base (1) is an L-shaped base; the circuit board (5) is fixed on the L-shaped base, the laser (4) is attached to a chip bonding pad position reserved on the circuit board (5), and the size of the chip bonding pad is consistent with that of a chip.
9. The fiber-coupled welding process according to claim 6, characterized in that if the light-dropping phenomenon occurs, the optical signal is recovered by adjusting the welding position between the rear end of the adjusting sleeve (2) and the optical fiber connector (3).
10. The optical fiber coupling welding process according to claim 6, wherein the adjusting sleeve (2) and the optical fiber connector (3) are welded by penetration welding, and the adjusting sleeve (2) and the base (1) are welded by three-way 120-degree oblique welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211655266.0A CN115857119A (en) | 2022-12-22 | 2022-12-22 | Optical fiber coupling structure and coupling welding process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211655266.0A CN115857119A (en) | 2022-12-22 | 2022-12-22 | Optical fiber coupling structure and coupling welding process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN115857119A true CN115857119A (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211655266.0A Pending CN115857119A (en) | 2022-12-22 | 2022-12-22 | Optical fiber coupling structure and coupling welding process thereof |
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| CN (1) | CN115857119A (en) |
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- 2022-12-22 CN CN202211655266.0A patent/CN115857119A/en active Pending
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