摘要
研究了室温运转灯泵电光调Q Cr,Tm,Ho∶YAG激光器的激光输出特性。选用高损伤阈值的掺镁LN晶体作为调Q晶体,并采用λ/4波片和平面镜组合的方式对热退偏效应进行补偿,从而实现了室温下电光调Q Cr,Tm,Ho∶YAG激光器大能量输出。在冷却水温为22℃,重复频率为1 Hz,泵浦能量为200 J的条件下,得到了单脉冲能量443 mJ,脉宽90 ns的调Q输出。理论分析了λ/4波片对热退偏效应的补偿效果,实验测量和分析了偏振片、LN晶体等调Q器件的插入损耗,并分析了激光器输出能量对重复频率的依赖现象。
The characteristics of a flash-lamp pumped electro-optic （EO） Q-switched Cr, Tm, Ho： YAG laser in room temperature is studied. By choosing a Mg-doped LN crystal with high damage threshold as the Q-switch and combining a quarter-wave plate and a flat mirror to minimize the depolarization loss, we realized the EO Q-switched output of the Cr,Tm, Ho：YAG laser and obtained high energy output. With EO Q-switched repetition rate of 1 Hz, pump energy of 200 J and temperature of 22 ℃, a laser with a output pulse energy of 443 mJ at 2.1 p,m, pulse duration of 90 ns was obtained. The mechanism and effect of a quarter-wave plate to compensate depolarization loss were analyzed. The in- sertion losses of polarizer and LN crystal were measured and analyzed. The phenomenon that the output relies heavily on the repetition rate was also analyzed.
出处
《激光与红外》
CAS
CSCD
北大核心
2013年第2期167-170,共4页
Laser & Infrared
基金
中国科学院知识创新工程重点方向项目(No.kgcx2-yw-910)资助
关键词
激光器
高能量
电光调Q
掺杂LN晶体
热退偏
琼斯矩阵
laser
high-energy
EO Q-switched
doped LN crystal
thermally depolarization
Jones matrix
