激光技术, 2007, 31 (1): 0025, 网络出版: 2010-06-03
脉宽可控的腔倒空射频波导CO2激光器
RF excited waveguide CO2 laser with controllable width of cavity-dumping pulse
激光器 射频波导CO2激光器 腔倒空 脉冲宽度 CdTe电光调制器 lasers radio frequency excited CO2 laser cavity-dumped pulse width CdTe electro-optical modulator
摘要
为了得到脉宽可控的腔倒空射频波导CO2激光器，采用了在陶瓷板上直接开波导槽的方法，构成了多通道Z折叠主本振激光器结构，并在主振波导进行CdTe电光晶体腔内调Q。在理论上计算了加载在CdTe上的高压脉冲下降时间的长短对腔倒空激光脉冲宽度的影响，并通过对高压脉冲电源等效负载参数的调整，得到了脉冲宽度可控的高重频腔倒空激光脉冲。在20kHz，40kHz，65kHz及70kHz的重频工作下，得到了半峰全宽约30ns、峰值功率在2kW以上的腔倒空激光脉冲。结果表明，这种新型腔倒空射频波导CO2激光器满足激光外差成像雷达系统参数要求。
Abstract
A new cavity-dumping RF excited waveguide CO2,laser which may be used in a heterodyne imaging lidar system is presented. The relationship between the fall delay of high voltage(HV)pulse and the width of cavity-dumping laser pulse is calculated theoretically. In our experiment,the width of cavity-dumping laser pulse could be controlled by adjusting the equivalent load parameters of HV pulse power supply. The cavity-dumping laser pulses with full width at half maximum(FWHM)about 30ns,peak power above 2kW,are obtained at the repetition rate up to 70kHz,which meet the requirement of the pulse heterodyne imaging lidar system
王建银, 周鼎富, 陈建国, 孙鹏, 杨泽后, 陈涌. 脉宽可控的腔倒空射频波导CO2激光器[J]. 激光技术, 2007, 31(1): 0025. WANG Jian-yin, ZHOU Ding-fu, CHEN Jian-guo, SUN Peng, YANG Ze-hou, CHEN Yong. RF excited waveguide CO2 laser with controllable width of cavity-dumping pulse[J]. Laser Technology, 2007, 31(1): 0025.
PDF全文
