Laser gain module key performance testing device

Abstract

A laser gain module key performance testing device comprises a half-wave plate, a first polarization beam splitter prism, a beam expander, a first diaphragm, a to-be-tested laser gain module, a firstlens, a first 45-degree full-reflecting lens, a first 45-degree half-reflecting lens, a second variable-aperture diaphragm, a second lens, a wavefront sensor, a third 45-degree full-reflecting lens, athird variable-aperture diaphragm, a third lens, a second 45-degree half-reflecting lens, a third 45-degree full-reflecting lens, a test image sensor and a polarization analysis tester. The testing device can test two-dimensional gain distribution, two-dimensional wavefront distribution and two-dimensional thermal depolarization distribution of the to-be-tested laser gain module. The testing device has the advantages of being comprehensive in performance testing of the laser gain module, high in testing universality, compact in testing device structure and the like.

Description

technical field [0001] The invention relates to the technical field of solid-state laser amplification, in particular to a key performance testing technology of a laser gain module. Background technique [0002] With the development of solid-state laser technology, laser systems need to achieve laser pulse output with high energy, high power, and high beam quality. The laser gain module is the key module unit that affects the beam quality. The performance of the key module is comprehensively and systematically tested, which plays a key role in supporting the overall laser system performance control. [0003] The solid-state laser system gain medium mainly includes a transmissive rod-shaped or flake solid structure, and a reflective one. Here, we mainly focus on the transmissive solid gain medium. The two-dimensional gain distribution of the laser gain module is the main factor affecting the near-field of the beam. Detailed testing of the two-dimensional gain distribution of...

AI Technical Summary

Problems solved by technology

[0004] The existing test technology mainly includes testing the gain performance alone, or using different equipment to test the gain distribution, thermally induced bias distribution, and thermally induced wavefront distribution of the laser gain module. There is no device to give detailed thermal bias Testing and analysis methods and steps have complexity and uncertainty in experimental testing, making it difficult to unify and standardize

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