【作者】 魏星斌； 彭跃峰； 王卫民； 李德明；

【Author】 Wei Xingbin,Peng Yuefeng,Wang Weimin,Li Deming (Institute of Applied Electronics, China Academy of Engineering Physics, P.O. Box 919-1013, Mianyang, 621900, China)

【机构】 中国工程物理研究院应用电子学研究所；

【摘要】 报道了采用1064nm激光抽运3mm厚PPMgLN晶体光参量振荡技术实现高功率可调谐激光输出的实验结果。抽运源为二极管激光连续抽运Nd:YAG晶体声光调Q1μm激光器,PPMgLN晶体(MgO掺杂浓度5mol%)单谐振光参量振荡技术采用e→e+e相位匹配,消除了光束之间的走离效应和利用了PPMgLN晶体的最大非线性系数d33(27.4pm/V)。在1064nm激光抽运功率170W,声光Q开关工作频率10kHz和PPMgLN晶体工作温度90℃条件下,获得了平均功率24.2W、波长3.86μm中红外激光输出,斜率效率16.6%,连续工作10分钟输出功率稳定性约为±4%。通过改变周期为29.2μmPPMgLN晶体的工作温度30～200℃,获得了中红外波长3.9～3.7μm激光调谐输出。更多还原

【Abstract】 The experimental results of a high-power tunable mid-infrared laser are presented. The optical parametric oscillator (OPO) with a 3 mm thickness PPMgLN crystal is pumped by the acousto-optical Q-switched Nd:YAG 1 μm laser. The phase-matching of the singly resonated OPO (SRO) is e→e+e, so the walk-off of the beams can be avoided and the maximal nonlinear coefficient d33(27.4 pm/V) is available. When the pump power of the 1.064 μm laser is 170 W at 10 kHz, and the PPMgLN with 5 mol% MgO doping is operated at 90 ℃ , average output powerof 24.2 W at 3.86 μm is obtained. The slope efficiency is 16.6%. And the output power stability in 10 minutes with continuous operation is about ±4%. The wavelength tuning range of 3.9-3.7 μm is achieved by changing the temperature of the 29.2 μm PPMgLN crystal from 30 to 200 ℃.更多还原