由1532纳米窄带激光二极管泵浦的高效1645纳米连续波和调Q铒钇铝石榴石激光器。

Efficient 1645 nm continuous-wave and Q-switched Er:YAG laser pumped by 1532 nm narrow-band laser diode.

作者信息

Zhu Liang, Wang Mingjian, Zhou Jun, Chen Weibiao

机构信息

Research Center of Space Laser Information Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai, China.

出版信息

Opt Express. 2011 Dec 19;19(27):26810-5. doi: 10.1364/OE.19.026810.

DOI:10.1364/OE.19.026810

PMID:22274263

Abstract

Energy transfer upconversion induced thermal effects are mainly responsible for the low efficiency of laser diode pumped Er:YAG lasers. The current work adopts Er:YAG rods with 0.25% Er(3+) doping concentration, instead of the commonly used rods with 0.5% Er(3+) doping concentration. Results show that the thermal effect is greatly alleviated. A continuous-wave output of 10.2 W is obtained using 31 W incident pump power. Optical-optical efficiency is approximately 33%. Slope efficiency, with respect to the absorbed pump power, is as high as 83%, which is close to the quantum efficiency. In a Q-switched operation, 7 mJ pulses with a pulse width of ~65 ns are obtained at 100 Hz PRF.

摘要

能量转移上转换诱导的热效应是激光二极管泵浦Er:YAG激光器效率低下的主要原因。当前工作采用了掺杂浓度为0.25% Er(3+)的Er:YAG棒，而非常用的掺杂浓度为0.5% Er(3+)的棒。结果表明，热效应得到了极大缓解。使用31 W的入射泵浦功率获得了10.2 W的连续波输出。光-光效率约为33%。相对于吸收的泵浦功率，斜率效率高达83%，接近量子效率。在调Q运转中，在100 Hz重复频率下获得了脉宽约为65 ns、能量为7 mJ的脉冲。