CAJ | 학술논문

针对激光定向干扰系统要求对抗1μm ～3μm和3μm ～5μm2种类型探测器，需要输出相应2种波段激光，通过高重频调 Q技术和种子注入光放大技术，获得高功率高光束质量1．06μm光纤激光输出，外置起偏器获得2束激光输出，分别为泵浦周期极化钽酸锂和周期极化铌酸锂晶体，实现高功率1μm ～3μm 和3μm ～5μm激光输出。在电源输入电流60 A ，调 Q驱动频率50kHz的条件下，获得最高功率7．5W的2μm激光和4．2W的3．9μm激光，频率转换效率为39．5％。实验结果表明：通过光纤激光器泵浦光参量振荡器，可获得高功率1μm ～3μm和3μm ～5μm双波段激光输出。
침대격광정향간우계통요구대항1μm ～3μm화3μm ～5μm2충류형탐측기，수요수출상응2충파단격광，통과고중빈조 Q기술화충자주입광방대기술，획득고공솔고광속질량1．06μm광섬격광수출，외치기편기획득2속격광수출，분별위빙포주기겁화단산리화주기겁화니산리정체，실현고공솔1μm ～3μm 화3μm ～5μm격광수출。재전원수입전류60 A ，조 Q구동빈솔50kHz적조건하，획득최고공솔7．5W적2μm격광화4．2W적3．9μm격광，빈솔전환효솔위39．5％。실험결과표명：통과광섬격광기빙포광삼량진탕기，가획득고공솔1μm ～3μm화3μm ～5μm쌍파단격광수출。
Aiming at the laser directed interference system ,which counteracts two kinds of de‐tectors of 1 μm~3 μm and 3 μm~5 μm ,needing two corresponding wavebands outputs ,we used the high repetition rate driving Q‐switched technology and the seed injection magnifying technology to acquire high‐power good‐quality 1 .06 μm fiber laser output ,the exterior polariz‐er got two beams laser outputs ,the periodically poled lithium tantalate (PPLT) and periodical‐ly poled lithium niobate (PPLN ) crystals were pumped to get high‐power 1 μm ~3 μm and 3 μm~5 μm laser outputs .As the input current was 60A and the Q‐switched frequency was 50 kHz ,the 2 μm laser output was obtained with up to 7 .5 W power as well as the 3 .9 μm laser with a 4 .2 W max power ,the conversion efficiency was 39 .5% .Experiment results indi‐cate that using the fiber laser pumped optical parametric oscillator(OPO) ,the high power 1~3 μm and 3~5 μm dual‐band laser output can be got .