脉冲单频Nd∶YVO_4激光器及其倍频输出特性研究  

Properties of pulse single-frequency laser and extra-cavity double frequency green laser

作　　者：董磊[1] 刘欣悦[1] 陈浩 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]长春新产业光电技术有限公司,吉林长春130000

出　　处：《中国光学》2015年第5期800-805,共6页Chinese Optics

基　　金：国家高技术研究发展计划(863计划)资助项目(No.2014AAXXX1003X)

摘　　要：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1 064 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1 064 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1 064nm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 k W的1 064 nm脉冲单频激光和脉宽约20 ns、峰值功率约0.5 k W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。In order to manufacture a pulse single-frequency laser with master oscillator power amplifier（ MOPA） structure used for laser coherence imaging,the properties of acousto-optic Q-switched pulse single-frequency 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 laserwith 28 nm pulse width and 6. 5 k W peak power and 532 nm laser with 20 ns pulse width and 0. 5 k W 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.

关 键 词：单频激光器 声光调Q 脉冲激光 腔外倍频 相干性 

分 类 号：TH743[机械工程—光学工程]