声光Q开关的漏光特性与射频功率关系的研究  

Study on relationship between leakage properties and radio frequency power of an acousto-optic Q-switch

作　　者：马超群 张滢 汪晓聪 韩聚洪 蔡和[1] 刘晓旭 安国斐[1] 王浟 MA Chaoqun;ZHANG Ying;WANG Xiaocong;HAN Juhong;CAI He;LIU Xiaoxu;AN Guofei;WANG You(Southwest Institute of Technical Physics, Chengdu 610041,China)

机构地区：[1]西南技术物理研究所,成都610041

出　　处：《激光技术》2021年第3期298-302,共5页Laser Technology

基　　金：国家重点研发计划资助项目(2017YFB0405101)。

摘　　要：为了研究LD抽运的Nd∶YVO4的声光Q开关的射频功率对衍射效率、漏光功率与门信号开启后激光输出脉冲序列的时间特性的影响,通过调节施加在Q开关上的射频功率,取得了漏光与激光脉冲上升时间随之变化的趋势并加以分析。结果表明,在射频功率增大到4.4 W时,漏光完全消失;在射频功率位于2W~3 W之间时,漏光功率在500mW以下,且激光脉冲上升时间是到达第一阈值所用时间的60%~70%;得到了既顾及门信号开启后激光输出脉冲序列的上升时间、又尽可能在Q开关处于hold-off状态时保持低的激光漏光功率的驱动射频信号的功率范围。该研究结果对构建适用于可快速开启的、热效应较为严重的声光调Q固体激光器具有较好的参考价值。To study the influence of radio frequency(RF)power of LD pumped Nd∶YVO acousto-optic Q-switch on diffraction efficiency,by adjusting the RF power applied on the Q-switch,the changing trend of the light leakage and the rise time of the laser pulse was obtained and analyzed.The results show that the leakage light completely disappears when the RF power increases to 4.4W,and the leakage power is less than 500mW when the RF power is between 2W~3W.And the rise time of laser pulse is 60%~70%of the time to reach the first threshold.In summary,not only the rise time of the outputted laser pulse train is considered after the door signal is turned on,but also the light leakage power of the laser is kept as low as possible when the Q-switch is set at the so-called hold-off status.The research results have good reference value for the construction of an acousto-optic Q-switched solid-state laser that can be turned on quickly and have a serious thermal effect.

关 键 词：激光技术 声光调Q 固体激光器 漏光 门信号 射频功率 

分 类 号：TN248.1[电子电信—物理电子学]