基于周期极化钽酸锂晶体的光参变振荡器技术研究  

Research on Optical Parametric Oscillator Based on Periodically Poled LiTaO_3 Crystal

作　　者：魏星斌[1] 彭跃峰[1] 王卫民[1] 陈兴无[1] 王春华[1] 谢刚[1] 

机构地区：[1]中国工程物理研究院应用电子学研究所,四川绵阳621900

出　　处：《光学学报》2011年第6期145-149,共5页Acta Optica Sinica

摘　　要：对基于周期极化钽酸锂(PPLT)晶体的光参变振荡器(OPO)技术进行了理论分析和实验研究,通过三波混频耦合波方程组,计算了PPLT-OPO的波长调谐曲线。分别研究了信号光单谐振结构(SSRO)和闲频光单谐振结构(ISRO)下,PPLT-OPO的中红外激光输出特性。当Nd:YAG激光器输出的1.064μm激光抽运功率为48 W,重复频率为5 kHz时,SSRO和ISRO输出的3.9μm中红外激光功率分别为5.78 W和5.07 W,相应的转换效率分别为12%和10.6%,ISRO输出的3.9μm激光的近场光斑分布和光束质量优于SSRO的输出结果。The theoretical analysis and experimental research of the optical parametric oscillator （OPO） based on periodically poled LiTaO3 （PPLT） crystal are presented. The wavelength tuning curves of PPLT-OPO are calculated through the coupling equations of the three-wave mixing. The output characters of signal singly resonant oscillator （SSRO） and idler singly resonant oscillator （ISRO） are studied. When the pump power of the Nd：YAG 1.064μm laser is 48 W with a repetition rate of 5 kHz, the output powers of 3.9μm laser from SSRO and ISRO are 5.78 W and 5.07 W, and corresponding conversion efficiencies are 12 % and 10.6 % respectively. The near-field distribution and beam quality of the 3.9μm laser from ISRO are better than those from SSRO.

关 键 词：激光器 中红外激光 光参变振荡器 PPLT晶体 单谐振 可调谐 

分 类 号：TN248.1[电子电信—物理电子学]