CN-121995643-A - Laser output optical device, laser, device and method

CN121995643ACN 121995643 ACN121995643 ACN 121995643ACN-121995643-A

Abstract

The application discloses a laser output optical device, a laser, equipment and a method. The laser output optical device comprises an output optical fiber, an optical waveguide and an optical output head which are sequentially connected, wherein the output optical fiber is used for outputting a spot ring light beam, a cladding layer, which is close to at least part of the output optical fiber, of the optical waveguide and covers the second fiber core comprises a second conical structure, the cross section of the second conical structure is annular, the outer diameter of the second conical structure is gradually increased along the light beam transmission direction, the optical path of the spot ring light beam is used for adjusting the divergence angle of the inner ring light beam and the outer ring light beam so as to realize adjustment, and the optical output head is used for outputting the light beam adjusted by the optical waveguide. The application can accurately regulate and control the pre-modulation light from the output optical fiber, realize the adjustment of the divergence angle of the output light and the improvement of the quality of the light beam, and has the advantages of simple structure, low cost and high stability.

Inventors

JIANG FENG
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LEI JIAN
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Assignees

深圳市创鑫激光股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260205

Claims (10)

1. A laser output optical device comprising, in order: an output optical fiber comprising at least one first fiber core and a cladding coating the first fiber core, and used for outputting a point ring light beam; the optical waveguide comprises at least one second fiber core and a cladding layer for cladding the second fiber core, the cladding layer for cladding the second fiber core, which is close to at least part of the area of the output optical fiber, comprises a second conical structure, the cross section of the second conical structure is annular, the outer diameter of the second conical structure is gradually increased along the beam transmission direction, and the optical waveguide is used for adjusting the optical path of the spot ring beam so as to realize adjustment of the divergence angle of the inner ring beam and the outer ring beam; And the optical output head is used for outputting the light beam regulated by the optical waveguide.
2. The laser output optic of claim 1 wherein the cladding of the output fiber adjacent at least a partial region of the optical waveguide that surrounds the first core comprises a first taper structure for controlling the magnitude of the output fiber output beam divergence angle.
3. The laser output optic of claim 2 wherein the cladding surrounding the first core comprises a first cladding layer, the first cladding layer adjacent to at least a partial region of the optical waveguide comprising a first tapered structure; Or, the cladding layer surrounding the first fiber core comprises a first cladding layer and a second cladding layer, and the second cladding layer close to at least partial area of the optical waveguide comprises a first conical structure; Alternatively, the cladding surrounding the first core comprises a first cladding, a second cladding, and an outer cladding, the outer cladding adjacent to at least a partial region of the optical waveguide comprising a first tapered structure.
4. The laser output optic of claim 1 wherein the cladding surrounding the second core comprises a fifth cladding comprising a second taper structure proximate at least a partial region of the output fiber; Or, the cladding surrounding the second core includes a fifth cladding and a sixth cladding, the sixth cladding adjacent to at least a partial region of the output fiber including a second taper structure; alternatively, the cladding surrounding the second core comprises a fifth cladding, a sixth cladding, and an outer cladding, the outer cladding adjacent to at least a partial region of the output fiber comprising a second taper structure.
5. The laser output optic of claim 1 wherein at least a portion of the cladding surrounding the second core proximate the optical output head comprises a third taper for controlling the magnitude of the divergence angle of the optical waveguide output beam.
6. The laser output optic of claim 5 wherein the cladding surrounding the second core comprises a fifth cladding comprising a third taper structure proximate at least a portion of the region of the optical output head; or, the cladding layer for cladding the second fiber core comprises a fifth cladding layer and a sixth cladding layer, and the sixth cladding layer close to at least partial area of the optical output head comprises a third cone-shaped structure; Or, the cladding layer for cladding the second fiber core comprises a fifth cladding layer, a sixth cladding layer and an outer cladding layer, and the outer cladding layer near at least part of the area of the optical output head comprises a third cone-shaped structure.
7. The laser output optic of claim 1, wherein the diameter of the first core is less than or equal to the diameter of the second core.
8. A method of making a laser output optic, the method comprising: providing an output optical fiber comprising at least one first fiber core and a cladding coating the first fiber core for outputting a spot ring light beam; Providing an optical waveguide, wherein the optical waveguide comprises at least one second fiber core and a cladding the second fiber core, the cladding the second fiber core at one end of the optical waveguide is subjected to conical treatment to obtain a second conical structure, the cross section of the second conical structure is annular, the outer diameter of the second conical structure is gradually increased along the beam transmission direction, and the optical path of the spot ring beam is used for adjusting the divergence angle of the inner ring beam and the outer ring beam; providing an optical output head for outputting the light beam adjusted by the optical waveguide; and connecting the output end of the output optical fiber with the second taper structure end of the optical waveguide, and connecting the other end of the optical waveguide with the optical output head.
9. A laser according to claim 1 to 7, comprising a laser output optic.
10. A laser processing apparatus according to claim 9, comprising a laser.

Description

Laser output optical device, laser, device and method Technical Field The present invention relates to the field of light laser technology, and in particular, to a laser output optical device, a laser, a device, and a method. Background The fiber laser has been developed into a mainstream laser, and has advantages of excellent beam quality, extremely high electro-optic conversion efficiency, excellent heat dissipation and reliability, compact structure, high stability, strong power expandability, green environmental protection, and the like. Therefore, the fiber laser is widely used in the fields of industrial processing (such as laser cutting, drilling and welding), ships, new energy, national defense and the like. However, in these applications, the control of the divergence angle of the output light of the fiber laser is always a key technical challenge. Instability in the divergence angle of the output light directly affects machining accuracy and efficiency, for example, in sheet metal cutting, variation in the divergence angle can lead to uneven kerf widths or inconsistent drilling depths. At present, the control of the divergence angle of the output light of the high-power fiber laser mainly depends on two main flow technical schemes, namely a collimation focusing system and a zoom beam expanding system, wherein the collimation focusing system is used for realizing indirect regulation and control of the divergence angle by integrating an optical lens group in the laser optical output head and adjusting the focal position to equivalently change the size of a light spot on a working distance. The variable-magnification beam expansion system directly reduces the divergence angle of the output beam by expanding the diameter of the output beam or increases the divergence angle by operation so as to adapt to different application requirements, and the system realizes beam shaping through a complex optical path design based on the geometrical optics principle. Disclosure of Invention In view of the above, it is necessary to provide an optical waveguide, a laser output optical device, a laser, and an apparatus and method for solving the above-described problems. A laser output optical device comprising, in order: an output optical fiber comprising at least one first core, a cladding radially surrounding the first core, and cladding the first core, for outputting a spot ring beam; The optical waveguide comprises at least one second fiber core and a cladding which is used for cladding the second fiber core radially outwards, wherein the cladding which is used for cladding the second fiber core and is close to at least part of the area of the output optical fiber comprises a second conical structure, the cross section of the second conical structure is annular, the outer diameter of the second conical structure is gradually increased along the beam transmission direction, and the optical path of the spot ring beam is used for adjusting the divergence angle of the inner ring beam and the outer ring beam; And the optical output head is used for outputting the light beam regulated by the optical waveguide. Preferably, the cladding of the output optical fiber surrounding the first core near at least a partial region of the optical waveguide includes a first taper structure for controlling the magnitude of the output beam divergence of the output optical fiber. Preferably, the cladding surrounding the first core comprises a first cladding, the first cladding adjacent to at least a partial region of the optical waveguide comprising a first tapered structure; Or, the cladding layer surrounding the first fiber core comprises a first cladding layer and a second cladding layer, and the second cladding layer close to at least partial area of the optical waveguide comprises a first conical structure; Alternatively, the cladding surrounding the first core comprises a first cladding, a second cladding, and an outer cladding, the outer cladding adjacent to at least a partial region of the optical waveguide comprising a first tapered structure. Preferably, the cladding surrounding the second core comprises a fifth cladding, the fifth cladding adjacent to at least a partial region of the output fiber comprising a second taper; Or, the cladding surrounding the second core includes a fifth cladding and a sixth cladding, the sixth cladding adjacent to at least a partial region of the output fiber including a second taper structure; alternatively, the cladding surrounding the second core comprises a fifth cladding, a sixth cladding, and an outer cladding, the outer cladding adjacent to at least a partial region of the output fiber comprising a second taper structure. Preferably, at least a portion of the cladding surrounding the second core near the optical output head includes a third taper structure for controlling the size of the divergence angle of the output beam of the optical waveguide. Preferably, the cladding surrounding t