设计并自制了一种平行平面腔法布里-珀罗干涉仪,将脉冲染料激光器的输出线宽由4 GHz压缩至340 MHz。采用法布里-珀罗标准具拍照法对激光线型进行实时监测,实现了脉冲激光线型的同步扫描;配合碘吸收谱测量,搭建了经线宽压缩的脉冲染料激光的100 MHz量级的精细波长调谐及标定系统。将该激光系统用于氧化物阴极放电氩等离子体的激光诱导荧光诊断中,验证了线宽压缩系统的可行性,离子速度分布函数的速度分辨率可达200 m/s。

A parallel-plane cavity Fabry-Perot interferometer is designed and made to narrow the linewidth of the pulsed dye laser from 4 GHz to 340 MHz. The Fabry-Perot etalon photographing method is used to monitor the laser line type in real time, and the synchronous scanning of the pulse laser line type is realized. With the iodine absorption spectrum measurement, we built a fine-wavelength tuning and calibration system on the 100 MHz scale of the linewidth narrow pulsed dye laser. The laser system is used in the laser-induced fluorescence diagnostic of oxide-coated cathode discharge argon plasma. The feasibility of the linewidth narrowing system is verified, and the velocity resolution of the ion velocity distribution function is up to 200 m/s.