Author Affiliations
Abstract
1 Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai 201800, China
2 University of Chinese Academy of Sciences, Beijing 100049, China
A stable, single-longitudinal-mode, nanosecond-pulsed Nd:YAG laser with a laser-diode dual-end pumping arrangement is constructed. Injection seeding is performed successfully by utilizing a RbTiOPO4 crystal as the intracavity phase modulator to change the optical length of the slave cavity based on the delay-ramp-fire technique. The laser generates 9.9 mJ of pulse energy with a 16 ns pulse duration at a 400 Hz repetition rate. A near-diffraction-limit laser beam is achieved with a beam quality factor M2 of approximately 1.2. The frequency jitter is 1.5 MHz over 2 min, and the fluctuation of the output pulse power is 0.3% over 23 min.
140.3570 Lasers, single-mode 140.3580 Lasers, solid-state 140.3540 Lasers, Q-switched Chinese Optics Letters
2015, 13(11): 111404
中国科学院上海光学精密机械研究所， 上海市全固态激光器与应用技术重点实验室， 上海 201800
设计了激光二极管(LD)双端面抽运传导冷却复合Nd:YAG晶体电光调Q激光器，实现脉冲间隔可调的双Q脉冲输出。用两个光纤耦合输出的LD模块作为抽运源，偏硼酸钡(BBO)晶体作为Q开关，在一个抽运周期内两次启动Q开关，获得脉冲能量大于14 mJ，脉宽小于等于18 ns，脉冲间隔200~230 μs可调的双Q脉冲输出，激光器重复频率50 Hz，光光转换效率达到24%。探索了用磷酸二氘钾(KD*P)调Q晶体开关实现稳定双脉冲输出的可行性，通过抑制压电环效应，消除子脉冲现象，最终获得脉冲能量约11 mJ，脉宽小于等于18 ns。
激光技术 Nd:YAG激光器 双脉冲激光 磷酸二氘钾调Q 偏硼酸钡调Q
