CN212341529U - Laser fiber coupling light path structure - Google Patents
Laser fiber coupling light path structure Download PDFInfo
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- CN212341529U CN212341529U CN202020409788.2U CN202020409788U CN212341529U CN 212341529 U CN212341529 U CN 212341529U CN 202020409788 U CN202020409788 U CN 202020409788U CN 212341529 U CN212341529 U CN 212341529U
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Abstract
The utility model discloses a laser fiber coupling optical path structure, which comprises a laser generator, a multimode fiber and a coupling optical piece positioned between the laser generator and the multimode fiber, wherein a laser beam focused by the coupling optical piece is focused to the center of the multimode fiber, and the center of the multimode fiber and the center of the coupling optical piece are positioned on the same optical axis; its performance is good, and coupling efficiency is high, and in the laser beam of laser generator output passed through coupling optical member coupling income optic fibre, at this in-process, adopted plano-convex type condensing lens's peculiar convex surface and planar structure through coupling optical member for the collimation laser beam of laser generator output focuses on through convex surface and plane in proper order, and the effectual coupling efficiency that has improved the performance of product.
Description
Technical Field
The utility model relates to an optical fiber coupling technical field, concretely relates to laser fiber coupling light path structure.
Background
The existing LD laser outputs collimated laser beams, the diameter of a light spot focused by the laser beams is larger than the diameter of an optical fiber core, so that the laser beams cannot be effectively coupled into the optical fiber, the coupling efficiency is low, and the use performance of a product is poor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a laser fiber coupling light path structure to solve the problem that current laser fiber coupling light path coupling efficiency is low.
The utility model provides an above-mentioned technical problem's technical scheme as follows: the laser fiber coupling optical path structure comprises a laser generator, a multimode fiber and a coupling optical piece positioned between the laser generator and the multimode fiber, wherein a laser beam focused by the coupling optical piece is focused to the center of the multimode fiber, and the center of the multimode fiber and the center of the coupling optical piece are positioned on the same optical axis.
Further, the coupling optics include a plano-convex condensing lens having a convex end and a planar end, the convex end of the plano-convex condensing lens being proximate to the laser generator, the planar end of the plano-convex condensing lens being proximate to the multimode optical fiber.
Furthermore, the convex surface of the plano-convex condensing lens is of an aspheric structure.
Further, the core diameter of the multimode optical fiber was 100 μm.
Further, the NA value of the multimode fiber was 0.22.
Further, the laser generator adopts an LD laser.
The utility model discloses following beneficial effect has: the utility model provides a laser fiber coupling light path structure, performance is good, and coupling efficiency is high, and the laser beam of laser generator output passes through coupling optics spare coupling and gets into in the optic fibre, and in this process, adopts the peculiar convex surface and the planar structure of plano-convex type condensing lens through coupling optics spare for the collimation laser beam of laser generator output focuses on through convex surface and plane in proper order, and the coupling between laser beam and the optic fibre of being convenient for has effectually improved coupling efficiency; by setting the core diameter and the NA value of the multimode optical fiber, the angle range of the laser beam entering the optical fiber is increased, the laser beam transmission with larger incident angle is realized, the butt joint effect between the optical fiber and the focused laser beam is ensured, and the service performance of the product is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a middle coupling optical element according to the present invention;
the reference numerals shown in fig. 1 to 2 are respectively expressed as: 1-laser generator, 2-multimode fiber, 3-coupling optical piece, 301-convex end, 302-plane end and 30-plano-convex condenser lens.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1 to 2, the laser fiber coupling optical path structure includes a laser generator 1, a multimode fiber 2, and a coupling optical member 3 located between the laser generator 1 and the multimode fiber 2, wherein a laser beam focused by the coupling optical member 3 is focused to a center of the multimode fiber 2, and the center of the multimode fiber 2 and the center of the coupling optical member 3 are located on the same optical axis.
The laser generator 1 adopts an LD laser, adopts semiconductor materials as working substances, and has the advantages of small volume, long service life, good service performance and high luminous efficiency. The multimode fiber 2 has multiple transmission modes and low cost. When in use, the collimated laser beam generated by the laser generator 1 is focused by the coupling optical member 3 and then coupled into the multimode optical fiber 2, wherein the coupling optical member 3 comprises a plano-convex condensing lens 30 having a convex end 301 and a planar end 302, the convex end 301 of the plano-convex condensing lens 30 is close to the laser generator 1, and the planar end 302 of the plano-convex condensing lens 30 is close to the multimode optical fiber 2. The laser beam is firstly focused through the convex surface of the plano-convex condensing lens 30, and the focused laser beam is coupled into the multimode optical fiber 2, so that the sufficient coupling of the laser beam is realized, and the coupling efficiency is high. The center of the multimode fiber 2 and the center of the plano-convex condensing lens 30 are positioned on the same optical axis, so that the precision of the laser beam coupled into the multimode fiber 2 is improved, and the coupling effect is ensured.
The convex surface of the plano-convex condensing lens 30 is an aspheric structure to realize minimum spherical aberration and improve the refraction performance of the light beam, thereby ensuring the condensing effect of the light beam.
The core diameter of the multimode optical fiber 2 was 100 μm, and the NA value of the multimode optical fiber 2 was 0.22.
The laser generator 1 uses an LD laser. The LED lamp adopts semiconductor materials as working substances, and has the advantages of small volume, long service life, good service performance and high luminous efficiency.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. The laser fiber coupling optical path structure is characterized by comprising a laser generator (1), a multimode fiber (2) and a coupling optical member (3) positioned between the laser generator (1) and the multimode fiber (2), wherein a laser beam focused by the coupling optical member (3) is focused to the center of the multimode fiber (2), and the center of the multimode fiber (2) and the center of the coupling optical member (3) are positioned on the same optical axis; the coupling optical part (3) comprises a plano-convex condensing lens (30) with a convex end (301) and a planar end (302), the convex end (301) of the plano-convex condensing lens (30) is close to the laser generator (1), and the planar end (302) of the plano-convex condensing lens (30) is close to the multimode optical fiber (2).
2. The laser fiber coupling optical path structure according to claim 1, wherein the convex surface of the plano-convex condensing lens (30) is an aspheric structure.
3. The laser fiber coupling optical path structure according to any one of claims 1 to 2, wherein the core diameter of the multimode fiber (2) is 100 μm.
4. The laser fiber coupling optical path structure according to claim 3, wherein the NA value of the multimode fiber (2) is 0.22.
5. The structure of claim 4, wherein the laser generator (1) is an LD laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020409788.2U CN212341529U (en) | 2020-03-26 | 2020-03-26 | Laser fiber coupling light path structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020409788.2U CN212341529U (en) | 2020-03-26 | 2020-03-26 | Laser fiber coupling light path structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212341529U true CN212341529U (en) | 2021-01-12 |
Family
ID=74085540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020409788.2U Expired - Fee Related CN212341529U (en) | 2020-03-26 | 2020-03-26 | Laser fiber coupling light path structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212341529U (en) |
-
2020
- 2020-03-26 CN CN202020409788.2U patent/CN212341529U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210112 |
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| CF01 | Termination of patent right due to non-payment of annual fee |