摘要
面向机载激光差分吸收雷达对小型轻量化激光光源的应用需求,研制了紧凑型自动调谐脉冲CO_(2)激光器。首先,研究了射频波导腔内光束和自由空间光学斩波光束孔径匹配关系,设计了具有实焦点的腔内光束变换系统,实验验证了斩波器通光孔径对激光脉冲波形的影响。其次,研究了CO_(2)激光器的波长调谐特性,分析了相邻激光谱线光栅衍射角度差,并基于高精度电动转台和金属闪耀光栅,实现了CO_(2)激光器波长自动调谐输出。最后,基于小型轻量化模块设计,完成了紧凑型自动调谐脉冲CO_(2)激光器集成。实验结果表明,该激光器在1 kHz条件下运转稳定,脉冲宽度为350 ns,峰值功率为3.7 kW,在9.2~10.7μm范围内测试到30条激光谱线,重量为18 kg,本文研究为机载激光差分吸收雷达提供了一种小型化探测光源。
In order to meet the application requirements of airborne laser differential absorption lidar for small and lightweight light sources,a compact pulsed CO_(2) laser is developed with automatic wavelength tuning.First,the aperture matching relationship between an RF waveguide intracavity beam and a free space optical chopper beam was studied,and a beam conversion system was designed with real focus on the intracavity.The influence of the chopper aperture on a laser pulse waveform was verified experimentally.Secondly,the wavelength tuning characteristics of CO_(2) laser were studied,and the diffraction angle difference between adjacent laser spectral lines was analyzed.Tunable operation in the CO_(2) laser was realized using a high-precision electric turntable and metal blazed grating.Finally,the integration of a compact automatic tuning pulsed CO_(2) laser was completed using small lightweight modules.Experimental results indicate that the laser operates stably at 1 kHz with a pulse width of 350 ns and a peak power of 3.7 kW.There are 30 lines within 9.2~10.7μm waveband.The total weight of the laser is 18 kg.It provides a miniaturized detection light source for airborne laser differential absorption lidar.
作者
潘其坤
苗昉晨
司红利
沈辉
高飞
于德洋
张阔
张冉冉
赵崇霄
陈飞
郭劲
PAN Qi-kun;MIAO Fang-chen;SI Hong-Li;SHEN Hui;GAO Fei;YU De-Yang;ZHANG Kuo;ZHANG Ran-ran;ZHAO Chong-Xiao;CHEN Fei;GUO Jin(State Key Laboratory of Laser Interaction with Matter,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;The Fifth Electronic Research Institute of MIIT,Guangzhou 510000,China;Rocket Army Equipment Department Military Representative Office in Harbin,Harbin 150028,China;North Automatic Control Technology Institute,Taiyuan 030006,China)
出处
《中国光学（中英文）》
EI
CAS
CSCD
北大核心
2022年第5期1007-1012,共6页
Chinese Optics
基金
国家重点研发计划(No.2018YFE0203200)
吉林省与中科院科技合作项目(No.2021SYHZ0028)
激光与物质相互作用国家重点实验室基金项目(No.SKLLIM1914,SKLLIM2114)
中国科学院青年创新促进会(No.2021216)。
