CAJ | 학술논문

3~5μm中红外激光在光电对抗领域有着重要的应用前景。如果中红外激光进入皮秒量级，将使其具有更高的峰值功率和作战效能。文中采用1.06μm 皮秒激光器泵浦单周期极化化学计量比钽酸锂晶体(周期为29.5μm)光参量产生器的方案，来获得皮秒中红外激光输出。其中皮秒泵浦源为自制的侧面泵浦结构1.06μm皮秒再生放大器。该激光器在1 kHz重复频率下，输出功率最高为2.02 W，脉冲宽度为13.6 ps。光参量发生器采用温度调谐方式，获得了3.98~3.68μm(晶体从40~200℃)皮秒中波红外可调谐激光输出。在最高泵浦功率泵浦，晶体温度为120℃时，获得最大中红外激光输出(闲频光)190 mW，光光转换效率达9.4%，充分验证了采用OPG的方式获得瓦级皮秒中红外激光输出的可行性。
3~5μm중홍외격광재광전대항영역유착중요적응용전경。여과중홍외격광진입피초량급，장사기구유경고적봉치공솔화작전효능。문중채용1.06μm 피초격광기빙포단주기겁화화학계량비단산리정체(주기위29.5μm)광삼양산생기적방안，래획득피초중홍외격광수출。기중피초빙포원위자제적측면빙포결구1.06μm피초재생방대기。해격광기재1 kHz중복빈솔하，수출공솔최고위2.02 W，맥충관도위13.6 ps。광삼량발생기채용온도조해방식，획득료3.98~3.68μm(정체종40~200℃)피초중파홍외가조해격광수출。재최고빙포공솔빙포，정체온도위120℃시，획득최대중홍외격광수출(한빈광)190 mW，광광전환효솔체9.4%，충분험증료채용OPG적방식획득와급피초중홍외격광수출적가행성。
Mid-infrared laser at 3-5μm has very important application in opto-electrionic countermeasure. If the infrared laser is pico-second pulse, as it has much higher peak-power, it will be much more powerful in contermeasure filed. In this paper, tunable optical parametric generator (OPG) pumped by a 1.06 μm picosecond laser based on periodically poled stoichiometric lithium tantalate (PPSLT) was reported to get pico-second mid-infrared laser. The periodically poled Lithium niobate crystal was a single structure (29.5μm). The pumping source was a home-made pico-second laser, which used a LD side-pumped regenerative amplifier. The maximum output power was 2.02 W at a frequency of 1 kHz, and pulse-wide was 13.6 ps. A continuous tunable middle-infrared (mid-IR) spectrum (idler wave) of 3.98-3.68μm was obtained by changing the crystal temperature from 40℃ to 200℃. When the maximum available average pump power was 2.02 W, the idler output power of OPG was 190 mW at 120℃, the optical-optical efficiency was 9.4%. This experimental research shows the possibility to get a output of picosecond mid-infrared laser by OPG at several watts level.