采用声光调Q获得激光脉冲序列的研究  

Study of Laser Pulse Sequence by Acousto-optic Modulation Q

作　　者：郑义军[1] 李强[1] 左铁钏[1] 

机构地区：[1]北京工业大学国家产学研激光技术中心,北京100022

出　　处：《北京工业大学学报》2003年第4期438-440,450,共4页Journal of Beijing University of Technology

基　　金：国防科工委重点实验室基金资助项目(00JS50.1.2.QT0101)

摘　　要：为了获得高峰值功率激光脉冲序列输出,以提高激光打孔过程中微孔的质量,减小再铸层的厚度,设计了一套系统:通过编制一定形状的外触发信号对Nd:YAG脉冲激光器进行声光调制,得到峰值功率为2.5×103KW的激光脉冲序列输出.研究了在不同外触发波形调制信号和不同延迟时间下(50-250μs)的激光脉冲序列形状.并从充放电回路和电光转换时间的角度,分析了延迟对脉冲序列的影响,由此得到对一般Nd:YAG脉冲激光器进行声光外调制的延迟时间为150 μs左右.In order to acquire the high power laser pulse sequence to increase the quality of laser drilling and thin the recast layer of micropores, a system is designed to make acousto-optic modulation(AOM) on the Nd: YAG pulse laser by a certain shape of external trigger signal so that the laser pulse sequence of the high power of 2.5X102 kW is obtained. The modulation signal of different external trigger waveform and the laser pulse sequence shape under different delay time(50-250μs) are studied. According to the circuit of charge and discharge and the time of electro-optic transfer, the influence of delay on pulse sequence is analyzed, and from this it is known that the delay time of the AOM of Nd: YAG pulse laser is about 150μs.

关 键 词：ND:YAG脉冲激光器 声光调Q 脉冲序列 

分 类 号：TN248.34[电子电信—物理电子学]