A slab solid-state laser pump gain module

Abstract

The present invention relates to a slab solid-state laser pumping gain module, belonging to the technical field of lasers. A pumping light source is incident from all the sides of a section of a slablaser medium to allow distribution pumping light in the slab laser medium and vibration light to achieve high mode matching degrees in a two-dimensional direction of the section. The slab solid-statelaser pumping gain module employs the VCSEL to perform symmetrical annular pumping from light-proof four surfaces of the slab laser medium, performs conduction cooling at non-pumping areas on the foursurfaces, and employs four-sided symmetrical pumping to allow the vibration light and the pumping light in the slab laser medium to have a high matching degree on the basis of maintaining the good heat dispersion performance of the slab laser medium, and segmental pumping allows the temperature gradient in the slab laser medium to be periodically changed in the laser transmission direction so asto eliminate the thermal lens effect of the slab laser medium.

Description

technical field [0001] The invention relates to a slab solid laser pump gain module, which belongs to the field of laser technology. Background technique [0002] In solid-state lasers, compared with the traditional round rod-shaped laser medium, the slab-shaped laser medium can effectively reduce thermal lens and thermally induced birefringence effects due to its excellent heat dissipation on the side, thereby achieving high beam quality output. . [0003] The usual pumping methods for slab-shaped laser media mainly include end-face, side, large-area pumping and angle pumping. [0004] In these pumping methods, except for angle pumping, in other pumping methods, the slab laser slab-shaped laser medium is a hexahedral structure, in which two surfaces are light-transmitting surfaces, and at least one surface is a cooling surface, so , the pumping surface is at most three surfaces (in engineering practice, the pumping surface is usually one surface, or two opposite parallel ...

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Problems solved by technology

The pumping of one or two surfaces, the pump band formed inside the slab-shaped laser medium, can only form a Gaussian distribution in one-dimensional direction, and it is difficult to form a good mode matching with the oscillating light of two-dimensional Gaussian distribution, so , this type of slab laser usually has a certain difference in beam quality in the two directions

For angle pumping, the edge of the hexahedral slab laser slab-shaped laser medium is chamfered, and the pump light is incident from the chamfered corner. This pumping method improves the pump power density and one-dimensional laser to a certain extent. pumping uniformity, but again cannot achieve good mode matching in two dimensions

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