Solid state laser

Abstract

A solid state laser comprises a pumping source, a pumping tail fiber, and a first coupling lens, a second coupling lens, a pumping-end cavity lens, a laser gain medium and an output cavity lens arranged in the pumping laser output direction of the pumping tail fiber successively, the upper and lower end surfaces of the laser gain medium include upper and lower heat sinks respectively, and the pumping-end cavity lens, the output cavity lens and the laser gain medium form a laser resonator. The solid state laser is characterized in that the laser gain medium is a periodic composite gain medium which is formed by slice-shaped laser crystals in the micron level thickness and slice high-thermal-conductivity materials in the in the micron level thickness by high-temperature bonding. The solid state laser can realize laser output of high power, high beam quality and high polarization degree.

Description

technical field [0001] The invention relates to an all-solid-state high-power laser, in particular to a solid-state laser, which can realize high-power, high-beam quality, and linearly polarized laser output. Background technique [0002] High-power solid-state lasers have become an important tool in industrial production. In many application fields, not only high power but also high beam quality are required. However, due to the existence of quantum losses, absorption and scattering losses, a large proportion of the energy of high-power solid-state lasers will be converted into waste heat during operation, while the thermal conductivity of conventional laser crystals is not high, resulting in serious thermal effects at high power , including thermal lens, thermally induced birefringence, thermally induced wavefront distortion, and thermally induced medium bursting, etc., which not only limit the increase in the power of solid-state lasers, but also reduce the beam quality o...

AI Technical Summary

Problems solved by technology

Among them, the thermal effect of the slab structure solid-state laser is still serious at high power; while the thin-sheet structure solid-state laser has achieved high-power laser output, but it requires multi-pass pumping and complex optical system structure

In recent years, researchers have proposed the use of transparent high thermal conductivity materials combined with laser gain media to develop high-power lasers, but generally only use high thermal conductivity materials as laser window materials, or only as pure thermal conductivity materials, traditional high-power solid Problems with thermal effects in lasers persist

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