基于RTP相位调制器的900Hz单频脉冲Nd…YAG激光器  

900Hz Single-Frequency Pulsed Nd…YAG Laser Based on RTP Phase Modulator

作　　者：张俊旋 朱小磊[1] 臧华国[1] 陈卫标[1] 

机构地区：[1]中国科学院上海光学精密机械研究所空间激光信息传输与探测技术重点实验室,上海201800 [2]中国科学院大学,北京100049

出　　处：《中国激光》2016年第6期20-25,共6页Chinese Journal of Lasers

摘　　要：报道了半导体激光器双端面抽运单频调Q Nd…YAG激光器。采用磷酸钛氧铷(RTP)电光晶体作为腔内相位调制器主动调谐腔长,实现单频种子注入,获得稳定的单纵模输出。采用另外一对RTP电光晶体作为调Q开关,在900Hz重复频率下,利用单振荡级获得单脉冲能量为7.5mJ,脉宽为14.6ns,线宽为45 MHz的1064nm激光脉冲序列输出。激光束在水平方向和垂直方向的光束质量M2值分别为1.30和1.36。输出激光2min的频率稳定性为1.1MHz,线宽稳定性为0.52MHz。在传导冷却结构中,实现了高频率稳定性和线宽稳定性的窄线宽单频脉冲激光的输出。A laser diode dual-end-pumped,single-frequency Q-switched Nd…YAG laser is implemented.Singlefrequency seed injection is realized by utilizing an RbTiOPO4（RTP）crystal as the intracavity phase modulator to modulate the length of the cavity,which leads to the single longitudinal mode output.Adopting another pair of RTP crystals as a Q-switcher,the laser is capable of generating 7.5 mJ pulse-energy with 14.6ns pulse duration,and45 MHz linewidth at 900 Hz repetition rate.The beam qualities M2 of 1.30 in the horizontal direction and 1.36 in the vertical direction are obtained.The frequency stability is 1.1MHz and the linewidth stability is 0.52 MHz over2min laser output.In conductively cooled structure,the output of single-frequency pulsed laser with narrow linewidth,high frequency stability and high linewidth stability is obtained.

关 键 词：激光器 种子注入 电光调Q 全固态激光器 

分 类 号：TN248.1[电子电信—物理电子学]