中国激光, 2019, 46 (5): 0508018, 网络出版: 2019-11-11
高功率、高效率调Q绿光抽运的钛宝石宽调谐纳秒脉冲激光 下载: 802次
High-Power and High-Efficiency Widely Tunable Ti∶sapphire Nanosecond pulsed Laser Pumped by Q-Switched Green Laser
非线性光学 激光技术 钛宝石激光器 准连续 全固态 高效率 nonlinear optics laser technique Ti∶sapphire laser; quasi-continuous all-solid-state high efficiency
摘要
自行研制出钛宝石晶体抽运的波长为532 nm的全固态高功率激光器,实现了高功率、高转换效率的可调谐钛宝石激光输出。使用3列重复频率为1 kHz的激光二极管阵列对称式抽运Nd∶YAG晶体,通过调Q及腔内倍频,获得功率为37.8 W、波长为532 nm的抽运光,每个激光二极管的抽运脉冲包络内包含5个调Q脉冲,单脉冲宽度为90 ns,重复频率为5 kHz。采用该绿光抽运钛宝石晶体,获得733.5~871.1 nm波长范围内的连续调谐激光,在771 nm处获得的输出功率最大,为8.26 W,光-光转换效率高达42%,脉冲宽度为14 ns,30 min内输出功率稳定性优于±4.4%。
Abstract
Herein, an all-solid-state widely tunable Ti:sapphire laser pumped by a home-made 532 nm laser with high power and high conversion efficiency is demonstrated. First, a maximum output power of 37.8 W at 532 nm is obtained by Q-switching and intracavity frequency doubling via a Nd∶YAG crystal that is symmetrically pumped by three 1 kHz laser diode (LD) arrays. The envelope of each LD pulse contains five Q-switched pulses with a duration of 90 ns and repetition rate of 5 kHz. Using the green light to pump the Ti∶sapphire crystal, a 733.5-871.1 nm widely tunable laser is then obtained. The maximum output power at 771 nm is 8.26 W, the optical-optical conversion efficiency is 42%, and the pulse duration is 14 ns. Moreover, the output power stability is superior to ±4.4% within 30 min.
李隆普, 李玉娇, 宋艳洁, 张申金, 宗楠, 王志敏, 薄勇, 彭钦军, 许祖彦. 高功率、高效率调Q绿光抽运的钛宝石宽调谐纳秒脉冲激光[J]. 中国激光, 2019, 46(5): 0508018. Longpu Li, Yujiao Li, Yanjie Song, Shenjin Zhang, Nan Zong, Zhimin Wang, Yong Bo, Qinjun Peng, Zuyan Xu. High-Power and High-Efficiency Widely Tunable Ti∶sapphire Nanosecond pulsed Laser Pumped by Q-Switched Green Laser[J]. Chinese Journal of Lasers, 2019, 46(5): 0508018.