主被动调Q-锁模Nd∶YAG激光器的实验研究  

The Experimental Research on an Active-passive Mode-locked Nd∶YAG Laser

作　　者：莫霜[1] 曲彦臣[1] 任德明[1] 赵卫疆[1] 陈振雷[1] 

机构地区：[1]哈尔滨工业大学可调谐激光技术国家级重点实验室,黑龙江哈尔滨150001

出　　处：《激光与红外》2007年第8期722-724,共3页Laser & Infrared

摘　　要：对脉冲氙灯泵浦的调Q-锁模Nd：YAG固体激光器进行了实验研究.比较和分析了声光主动锁模、Cr^4＋ ：YAG晶体被动调Q-锁模以及这两种机制联合锁模情况下Nd：YAG激光器的输出特性.在Cr^4＋ ：YAG晶体被动调Q-锁模时得到了深度80%以上的锁模输出,但是锁模不完全,且波形和能量稳定性低,脉宽为1.9～3.6 ns.而主被动联合锁模克服了这一缺点,可获得幅值和能量抖动小于±5%、锁模深度100%、脉宽小于650ps、能量近300mJ的超短脉冲输出.The experiment on flashlamp-pumped Q - switched and mode-locked Nd：YAG laser is carried out. The out- put characters of Nd： YAG laser are compared and analyzed ：（1）passively Q - switched and mode-locked by Cr^4＋： YAG crystal; （2）actively mode-locked by acousto-optic mode-locker; （3）active-passively mode-locked by joint use of the two mechanisms. When using Cr^4＋ ：YAG crystal only, the depth of mode locking is above 80% but can not reach 100%. Pulse amplitude and energy are of low stability while the pulse width is 1.9 - 3.6ns. In the active-passlve mode locking, 100% mode locking is achieved with amplitude and energy fluctuation less than ± 5%, pulse width less than 650ps and output energy near 300mJ.

关 键 词：主被动锁模 CR^4+ :YAG 调Q-锁模 

分 类 号：TN248.1[电子电信—物理电子学]