RF激励波导CO2激光器电光调Q实验研究

The study on the E-O Q-switch of RF waveguide CO2 laser

摘要: 对用于激光主动成像雷达、运行于稳频选支模式的射频激励波导CO2激光器腔内插入CdTe电光晶体调Q实验进行了研究。计算了CdTe晶体的插入损耗并与实验结果取得了一致,对CdTe晶体和其配套的λ/4波片的热稳定性进行了研究,比较了加压式和退奢式电光调Q对激光脉冲特性的影响。激光调Q输出EH11模,重复频率41.67kHz,峰值功率达到360W,脉冲半宽度(FWHM)150ns。

Abstract: In this paper,we discuss the experimental results of intracavity CdTe electro-optical Q-switch for RF excited waveguide CO2 lasers with frequency-stable and line-selected,which is used in an active imaging radar.The loss of CdTe in the laser has been calculated and the results are consistent with that of experiment.We also discuss the thermal stability of the CdTe crystal and 1/4 waveplate,as well as the pulse characteristic of CdTe Q-switch at various instances.This laser has EH11 output mode with 150ns pulse width(FWHM),360W peak power at 41.67kHz pulse repetition frequency.