CN111258011A - Laser fiber coupling light path structure - Google Patents
Laser fiber coupling light path structure Download PDFInfo
- Publication number
- CN111258011A CN111258011A CN202010223052.0A CN202010223052A CN111258011A CN 111258011 A CN111258011 A CN 111258011A CN 202010223052 A CN202010223052 A CN 202010223052A CN 111258011 A CN111258011 A CN 111258011A
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- China
- Prior art keywords
- laser
- coupling optical
- fiber
- coupling
- multimode fiber
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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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
- G02B6/4228—Passive alignment, i.e. without a detection of the degree of coupling or the position of the elements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention 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 invention relates to the technical field of optical fiber coupling, in particular to a laser optical fiber coupling optical 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.
Disclosure of Invention
The invention aims to provide a laser fiber coupling optical path structure to solve the problem of low coupling efficiency of the existing laser fiber coupling optical path.
The technical scheme for solving the technical problems is 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 invention has the following beneficial effects: the laser fiber coupling optical path structure provided by the invention has good use performance and high coupling efficiency, the laser beam output by the laser generator is coupled into the optical fiber through the coupling optical piece, and in the process, the coupling optical piece adopts the special convex surface and plane structure of the plano-convex condensing lens, so that the collimated laser beam output by the laser generator is sequentially focused through the convex surface and the plane, the coupling between the laser beam and the optical fiber is convenient, and the coupling efficiency is effectively improved; 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 coupling optic of 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 this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the 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 purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
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.
2. The laser fiber coupling optical path structure according to claim 1, wherein the coupling optical member (3) comprises a plano-convex type condenser lens (30) having a convex end (301) and a planar end (302), the convex end (301) of the plano-convex type condenser lens (30) is close to the laser generator (1), and the planar end (302) of the plano-convex type condenser lens (30) is close to the multimode fiber (2).
3. The laser fiber coupling optical path structure according to claim 2, wherein the convex surface of the plano-convex condensing lens (30) is an aspheric structure.
4. The laser fiber coupling optical path structure according to any one of claims 1 to 3, wherein the core diameter of the multimode fiber (2) is 100 μm.
5. The laser fiber coupling optical path structure according to claim 4, wherein the NA value of the multimode fiber (2) is 0.22.
6. The structure of claim 5, wherein the laser generator (1) is an LD laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010223052.0A CN111258011A (en) | 2020-03-26 | 2020-03-26 | Laser fiber coupling light path structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010223052.0A CN111258011A (en) | 2020-03-26 | 2020-03-26 | Laser fiber coupling light path structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111258011A true CN111258011A (en) | 2020-06-09 |
Family
ID=70948003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010223052.0A Pending CN111258011A (en) | 2020-03-26 | 2020-03-26 | Laser fiber coupling light path structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111258011A (en) |
-
2020
- 2020-03-26 CN CN202010223052.0A patent/CN111258011A/en active Pending
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