Laser amplification system

Abstract

The invention provides a laser amplification system, and belongs to the field of solid lasers. The system comprises a seed source, a pumping source, a gain medium group consisting of a plurality of gain medium units, a pumping light coupling system and a heat sink, the gain medium units are sequentially distributed on two side surfaces of the heat sink symmetrically, each gain medium unit is composed of a thin-sheet gain medium bottom doped with active ions and a triangular-prism-shaped laser medium top which is not doped with active ions and has an isosceles-triangle-shaped bottom surface, the interior of the heat sink is of a columnar array structure, and cooling liquid flows in gaps of the columnar array structure; seed light emitted by the seed source enters the end gain medium unit within the range of + / -2 degrees of the Brewster angle, enters the next gain medium unit within the range of + / -2 degrees of the Brewster angle after being emitted, and is periodically propagated in the gain medium group in sequence; and pumping light emitted by the pumping source pumps the gain medium group through a pumping light coupling system. While the size of the gain medium is enlarged, the bending-resistant effect is achieved, and high-energy laser output with high light beam quality is achieved.

Description

technical field [0001] The invention belongs to the field of solid-state lasers, and in particular relates to a laser amplification system. Background technique [0002] High-energy solid-state lasers are more and more widely used in industrial applications, scientific research, national defense, medical and other fields. The laser amplification system is the key to obtaining high-energy laser output. A high-energy pump source will inevitably cause the gain medium to generate a lot of waste heat during operation, which requires effective thermal management of the gain medium to ensure the stability of the beam quality and laser efficiency. The study found that high-energy laser amplifiers can use multi-chip dispersed energy storage to reduce the impact of large-size gain media and high material emission cross-sections on energy storage efficiency, and at the same time meet the thermal management requirements for energy storage density at repetition frequencies. [0003] Bot...

AI Technical Summary

Problems solved by technology

Crystal growth generally adopts the pulling method. This crystal growth process limits the size of the slab medium, and it is impossible to make a large-sized slab medium, which limits the output laser energy.

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