中红外连续波单谐振光学参量振荡器热致相位失配  

Thermal-induced dephasing in mid-infrared continuous-wave singly resonant optical parametric oscillator

作　　者：刘磊[1] 汪晓波[1] 李霄[1] 许晓军[1] 姜宗福[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,长沙410073

出　　处：《强激光与粒子束》2012年第1期24-28,共5页High Power Laser and Particle Beams

摘　　要：为了研究热致相位失配对中红外连续波单谐振光学参量振荡器(CW-SRO)输出效率的影响,结合CW-SRO计算模型和热传导方程,利用有限元分析方法,重点对输出3.3μm波长闲频光的CW-SRO进行了分析。计算了不同信号光输出耦合率及不同泵浦功率下CW-SRO晶体输出截面上热致相位失配量的分布。由计算结果可以看出:晶体吸收腔中振荡信号光是导致晶体热效应的主要因素;在相同的输入条件下,泵浦功率在30 W以上时CW-SRO的热致相位失配将会大大降低其泵浦损耗率;通过增加信号光输出耦合率的方法,可以减少热致相位失配对CW-SRO输出效率的影响,但CW-SRO的振荡阈值会增加。This work is devoted to the study of thermal-induced dephasing in mid-infrared continuous-wave singly resonant optical parametric oseillator（CW-SRO）. The thermal induced dephasing in crystal output section versus pump power and output coupling of signal is calculated. The simulation results indicate that the crystal thermal effect of CW-SRO with 3.3 μm idler out put is mainly affected by the absorption of the circulating signal power. Under the same input conditions, the CW-SRO＇s thermalinduced dephasing with pump power above 30 W will greatly reduce the pump depletion. The thermal-induced dephasing will reduce with increasing the signal output coupling, while the threshold of CW-SRO will increase.

关 键 词：中红外 连续波 光学参量振荡器 热致相位失配 

分 类 号：O437.4[机械工程—光学工程]