Resonant cavity for pulse and line selection output of airflow hydrogen fluoride laser

Abstract

The invention relates to a resonant cavity for pulse and line selection output of an airflow hydrogen fluoride laser. The resonant cavity adopts a folded cavity structure. A rotatable first plane reflector, a second acoustic-optic modulator, a first acousto-optic modulator, a concave lens, a convex lens, a polarizer, a second plane reflector, a third plane reflector, a fluoride hydrogen gain medium region, and a plane-concave output mirror are coaxially arranged in sequence along the heading direction of output laser. According to the laser resonant cavity of the invention, line selection output of a laser is realized based on the fact that an acousto-optic medium in the second acoustic-optic modulator diffracts laser of different wavelengths at different angles and through scanning of the rotatable reflector, and pulse output of the laser is realized by using the first acousto-optic modulator to Q-modulate the laser. The resonant cavity has the advantages of low power consumption, good pulse stability and reliability, and the like. High-repetition-frequency and high-peak-power line selection output of an airflow hydrogen fluoride laser can be realized. The resonant cavity can be applied to laser countermeasure, laser detection and other fields.

Description

technical field [0001] The invention belongs to the field of chemical laser devices, and in particular relates to a resonant cavity used for pulse line selection output of gas flow hydrogen fluoride laser. Background technique [0002] Gas flow hydrogen fluoride laser has the characteristics of high power, high efficiency, excellent beam quality, and good engineering scalability. It has very broad and important applications in the fields of laser physics, laser chemistry, material processing, and laser countermeasures. Current gas flow hydrogen fluoride lasers usually operate in continuous wave. If the laser can operate at high repetition rate and high peak power with low average power loss, the application range of this laser will be greatly expanded. At present, the methods to realize the pulsed operation of the repetition rate hydrogen fluoride laser mainly focus on the use of pulsed discharge to induce pulsed laser, intracavity mirror Q-switching and gain modulation to r...

AI Technical Summary

Problems solved by technology

In these lasers, it is difficult to achieve high repetition rate and stable pulse laser output due to the limitation of power supply and motor performance, or the limitation of the effective spatial distribution and uniformity of the gain medium.

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