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A solid-state laser pumping source and a pumping structure

A solid-state laser and pump source technology, applied in the structure/shape of the active medium, lasers, laser components, etc., can solve the problem of non-uniform absorption efficiency and heating density of working materials, limitation of solid-state laser power improvement, and light-to-optical conversion efficiency. It can improve the efficiency of light-to-light conversion, reduce the difficulty of heat dissipation, and reduce the power of pump light.

Pending Publication Date: 2019-01-11
深圳活力激光技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The light beam with uneven distribution of light intensity leads to uneven absorption efficiency and heat generation density of the working material during high-power pumping, low light-to-light conversion efficiency, large residual heat in the crystal, uneven heat distribution and overheating in the center
The cavity shape design and heat dissipation design of solid-state lasers are more demanding. When making high-power solid-state lasers, crystal overheating damage will inevitably occur, which limits the power increase of solid-state lasers.

Method used

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  • A solid-state laser pumping source and a pumping structure
  • A solid-state laser pumping source and a pumping structure
  • A solid-state laser pumping source and a pumping structure

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0030] Reference 2, image 3 , a solid-state laser pump structure, comprising a solid-state laser pump source, a collimating lens 2, a converging lens 3, and a crystal 4 arranged in sequence, and the solid-state laser pumping source, collimating lens 2, and converging lens 3 are all facing the crystal 4. On one end face, the solid-state laser pumping includes a laser emission coupling module and an optical fiber bundle array 11. The optical fiber bundle array 11 includes at least one circular ring optical fiber array, and the pumping spot output by the optical fiber bundle array 11 is is a dot matrix.

[0031] In solid-state laser end-pumping, the solid-state laser pump source, that is, the fiber bundle array 11, emits an array beam output light source with a small beam divergence angle and uniform spot, and this light source passes through the optical element in the solid-state laser, that is, the collimating lens 2, After optical processing by the converging lens 3, a light...

Embodiment 2

[0034] refer to figure 2 , image 3 ,, Figure 4 , Figure 5 , Image 6 , the laser emission coupling module includes several single-tube laser chip sub-assemblies (COS-chip on submount) 19, optical fiber end face lens that are arranged linearly on the heat sink 18, and refer to Figure 5 , the end face of the fiber end face lens is set to be wedge-shaped curved; the laser light emitted by each single-tube laser chip subassembly 19 enters the corresponding single fiber in the fiber bundle array 11 after being coupled by the fiber end face lens. refer to Image 6 A plurality of such optical fibers are arranged in a multi-circle ring after stripping off the coating layer, and are fixed with glue to form an optical fiber bundle array 11, and form an optical fiber bundle output port with the optical fiber bundle output structure.

[0035] In this embodiment, the laser light emitted by each single-tube laser chip sub-assembly is introduced through the fiber end face lens with...

Embodiment 3

[0037] On the basis of embodiment 1, refer to figure 2 , image 3 , Figure 7 , Figure 8 The laser emission coupling module includes several sets of single-tube laser chipsets, a conventional beam combining device, and a focusing lens 17. The conventional beam combining device includes a fast-axis collimating mirror 13, a slow-axis collimating mirror 15, and a spatial close-packed beam combining device. refer to Figure 7 , Figure 8, the single-tube laser chip set includes several single-tube laser chip sub-assemblies 12, and the laser light emitted by each single-tube laser chip set passes through the fast-axis collimating mirror 13, the volume Bragg grating (VBG) 14, and the slow-axis collimating mirror 15 in sequence , mirror 16, and focusing lens 17 focus into the corresponding single fiber in the fiber bundle array 11. refer to Image 6 , a plurality of such optical fibers are stripped off the coating to form a multi-circle ring arrangement, glued and fixed, and ...

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Abstract

The invention discloses a solid-state laser pumping source and a pumping structure, belonging to the field of solid-state laser pumping, the invention comprises a solid-state laser pumping source arranged in sequence, collimating lens, a lens, crystal, solid laser pump source, collimating lens and converging lens are all facing one end face of that crystal, the solid laser pumping comprises a laser emission coupling module and an optical fiber bundle array, the optical fiber bundle array comprises at least one loop of circular optical fiber array, and the pump light spot output when the optical fiber bundle array is pumped is a dot matrix light spot. The present invention is used for end-pumping of solid-state lasers.

Description

technical field [0001] The invention belongs to the field of solid-state laser pumping, and in particular relates to a pumping structure for end-face pumping. Background technique [0002] The technical scheme in the end-pumping of solid-state lasers in the prior art is: the laser output with a wavelength of less than 1 micron by the semiconductor laser is used to pump the solid-state laser crystal by means of end-pumping, and a laser of 1064 nanometers is emitted, and the green laser is formed after frequency doubling. Light output, or UV laser output after 3 frequency doubling. The working material of the crystal of the solid-state laser is usually YAG crystal or YVO4 crystal doped with Nd, Yb and other substances. [0003] refer to figure 1 , the laser light from the semiconductor laser is emitted from the chip, and first undergoes shaping, beam combining, and coupling into an optical fiber 1. The core diameter of the optical fiber 1 is generally between 50 microns and ...

Claims

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Application Information

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IPC IPC(8): H01S3/00H01S3/067H01S3/094
CPCH01S3/0057H01S3/06754H01S3/094053
Inventor 蔡万绍穆敏刚
Owner 深圳活力激光技术有限公司