CAJ | 학술논문

为了研制激光干涉成像所需的主振荡功率放大（ MOPA）结构脉冲单频激光器，本文完成MOPA激光器的种子源即声光调Q脉冲单频1064 nm激光器的特性研究，同时完成种子源腔外倍频绿光特性研究。脉冲单频激光器采用声光调Q模块实现脉宽约20 ns的1064 nm脉冲激光输出，采用环形腔设计并采用一组不同厚度的标准具实现单纵模运转。实验研究基频1064 nm和倍频532 nm激光脉冲的线宽，得出在全脉宽范围内都具有较高时间相干性的结论。实验分别获得脉宽约28 ns峰值功率约6.5 kW的1064 nm脉冲单频激光和脉宽约20 ns、峰值功率约0.5 kW的532 nm脉冲单频激光，腔外倍频效率为5.6％。实验同时也验证了腔外倍频的激光脉宽压缩效应。
위료연제격광간섭성상소수적주진탕공솔방대（ MOPA）결구맥충단빈격광기，본문완성MOPA격광기적충자원즉성광조Q맥충단빈1064 nm격광기적특성연구，동시완성충자원강외배빈록광특성연구。맥충단빈격광기채용성광조Q모괴실현맥관약20 ns적1064 nm맥충격광수출，채용배형강설계병채용일조불동후도적표준구실현단종모운전。실험연구기빈1064 nm화배빈532 nm격광맥충적선관，득출재전맥관범위내도구유교고시간상간성적결론。실험분별획득맥관약28 ns봉치공솔약6.5 kW적1064 nm맥충단빈격광화맥관약20 ns、봉치공솔약0.5 kW적532 nm맥충단빈격광，강외배빈효솔위5.6％。실험동시야험증료강외배빈적격광맥관압축효응。
In order to manufacture a pulse single-frequency laser with master oscillator power amplifier( MO-PA) structure used for laser coherence imaging, the properties of acousto-optic Q-switched pulse single-fre-quency 1 064 nm laser used as MOPA laser seed, and properties of extra-cavity double frequency green laser were studied in the paer.1 064 nm pulse laser output with more than 20 ns pulse width was realized by means of acousto-optics Q-switch, and single-frequency running was realized by means of loop cavity and etalons with different thickness.The linewidth of 1 064 nm and 532 nm pulse lasers were studied.The experiment results show that there is almost complete coherence in all of the pulse width;1 064 nm pulse single-frequency laser with 28 nm pulse width and 6 .5 kW peak power and 532 nm laser with 20 ns pulse width and 0.5 kW peak power are obtained respectively.The efficiency of extra-cavity double-frequency is about 5.6%.The effect of laser pulse reduction by extra-cavity double-frequency is also validated by experiments.