宽调谐高效率声光调Q Nd∶YVO_4/PPMgLN光学参量产生器  

Widely tunable,high conversion efficiency,acousto-optic Q-switched Nd∶YVO_4/PPMgLN optical parametric generator

作　　者：林洪沂[1,2] 檀慧明[1] 崔铁成 刘丹丹[4] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所 [2]中国科学院研究生院 [3]63861部队 [4]长春理工大学理学院

出　　处：《激光与红外》2010年第2期155-157,共3页Laser & Infrared

基　　金：吉林省科技发展计划项目(No.200903053)资助

摘　　要：利用声光调Q的Nd∶YVO4激光器作为泵浦源,在室温下,实现了PPMgLN晶体准相位匹配光参量输出。光参量阈值仅为0.5 W(20 kHz,75 ns);在泵浦光2.25 W(20 kHz,52 ns),PPMgLN极化周期31.4μm时,获得了426.1 mW 3.03μm中红外脉冲激光输出;同时获得646.7 mW1.64μm信号光输出,总光光转化效率达到47.6%。并且通过改变晶体的极化周期,实现了闲频光3.03～4.49μm,信号光1.40～1.64μm宽带可调谐输出。We use an acousto-optic Q-switched Nd：YVO4 laser as the pump source and obtain a Nd：YV04/PPMgLN optical parametric generator （OPG）. The threshold value of OPO system is only 0.5 W （20 kHz,75 ns）at 1064 rim. When the pump power is 2.25 W （20 kHz,52 ns） ,a maximum idle laser output power of 426.1 mW at 3.03 pan, and a signal laser output power of 646.7 mW at 1.64 μm have been achieved, and this corresponds to a whole opticoptic conversion efficiency of 47.6%. By shifting the PPMgLN crystal, the periods of the domain structure on the PPMgLN wafer can be changed, thus enabling a widely tunable mid-infrared spectrum of 3.03 - 4.49 μm, and signal wavelengths widely tunable in range of 1.40 - 1.64μm.

关 键 词：光学参量产生器 PPMGLN晶体 中红外 可调谐 

分 类 号：TN248.1[电子电信—物理电子学]