A 2μm High Repetition Frequency Injection Locked Laser Based on Pyramid Ring Cavity

Abstract

The invention relates to a 2-micron high repetition frequency injection frequency-locking laser based on a pyramid annular cavity, and the laser comprises a pyramid prism, four reflectors, a pump light injection mirror, and an output mirror, which form an annular resonant cavity. And after a repetition-frequency radio frequency signal is applied to an acousto-optic Q switch, the Q-switched laser is output through a Q-switched slave laser along the opposite directions of the c direction and the b direction. Single-frequency laser emitted by a seed laser is injected into the Q-switched slave laser through the output mirror along the b direction; a piezoelectric ceramic part works, so the thickness periodically changes along with the applied voltage, and the cavity length of the slave laser resonant cavity is controlled; when the frequency of the seed light is the same as that of the laser resonant cavity, the seed light interferes in the resonant cavity, the detector measures an interference signal of the seed light and feeds the interference signal back to the electrical servo system, the electrical servo system controls the acousto-optic Q switch to work, high-repetition-frequency injection frequency-locking laser output is achieved, and frequency-locking laser is output out of the resonant cavity along c. Injection frequency-locking laser output with higher repetition frequency can be obtained, and the size of the laser is reduced.

Description

technical field [0001] The invention belongs to the technical field of solid-state lasers, and relates to a 2 μm high repetition frequency injection-locked laser, in particular to a 2 μm high repetition frequency injection-locked laser based on a pyramid ring cavity. Background technique [0002] The 2μm laser is in the eye-safe band, has the characteristics of high atmospheric transmittance, and has absorption peaks for water molecules and carbon dioxide molecules, so it can be widely used in laser radar, laser remote sensing, laser communication, laser medical treatment and diagnosis. In particular, the single-frequency pulse laser source in the 2μm band can be used as the laser source for Doppler wind radar and differential absorption radar. Therefore, the development of the 2μm single-frequency pulse laser source has become one of the research hotspots all over the world. [0003] Research on 2μm single-frequency pulsed lasers is mainly based on injection-locked technolo...

AI Technical Summary

Problems solved by technology

Therefore, the repetition frequency of the injection-locked laser in the 2μm band is limited by the step response time of the piezoelectric ceramic on the laser cavity mirror. If the piezoelectric ceramic works at a high repetition frequency, its step response time will be longer, and its own use The service life and pointing reliability of the moving cavity mirror will be reduced

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