Acousto-optic Q-adjusting airflow chemical laser apparatus

Abstract

The invention relates to an acousto-optic Q-adjusting airflow chemical laser apparatus. A resonant cavity of the apparatus employs a folded stable cavity structure. A blazed grating, an acousto-optic Q switch, a film Polaroid, a gain medium, a planar mirror 1, a planar mirror 2 and a plane concave front cavity mirror are successively arranged along the forward direction of output laser. According to the invention, the laser apparatus carries out Q adjustment by use of an acousto-optic effect of an acousto-optic medium, and through applying modulation signals to driving power supply signals, realizes periodical abrupt change of a high-Q value and a low-Q value of the resonant cavity so as to realize Q-adjusting pulse output of an airflow chemical laser. The apparatus has the advantages of compact structure, low power consumption, good pulse stability and reliability, capability of realizing high-repetition-rate and high-peak-power output, and the like, thereby being widely applied to such fields as photoelectric confrontation, laser remote sensing, laser detection and the like.

Description

technical field [0001] The invention belongs to the field of chemical laser devices, in particular to an acousto-optic Q-switched gas flow chemical laser device. Background technique [0002] Strongly coherent light sources in the mid-infrared band have important applications in the fields of photoelectric countermeasures, laser remote sensing, laser detection and component analysis, industrial processing, and medical treatment. Pneumatic chemical lasers work in the mid-infrared spectral range and have the advantages of high power, high efficiency, and good engineering amplification, and are expected to be practical coherent light sources. At present, most jet chemical lasers operate in continuous wave. If the laser can operate at high repetition rate and high peak power, its working efficiency can be increased by dozens of times, which makes the pulsed continuous wave chemical laser become an interesting problem. [0003] At present, most of the methods to realize the Q-sw...

AI Technical Summary

Problems solved by technology

The use of rotating mirror Q-switching can obtain pulsed laser output under certain conditions, but it is subject to the influence of multiple output pulses, and the noise is large, the life of the shaft is short, and the assembly process is high, and it is difficult to obtain dozens of Pulsed lasers with repetition rates in the order of thousands or even hundreds of kilohertz

Therefore, the mechanical Q-switching method cannot fully satisfy the operation of high repetition rate and high peak power gas flow chemical lasers.

Images