CAJ | 학술논문

利用声光调Q的Nd:YVO_4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31.4 μm时,获得了426.1 mW 3.03 μm中红外脉冲激光输出;同时获得646.7 mW 1.64 μm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3.03～4.49 μm,信号光1.40～1.64 μm宽带可调谐输出.
이용성광조Q적Nd:YVO_4격광기작위빙포원,재실온하,실현료PPMgLN정체준상위필배광삼량수출.광삼량역치부위0.5 W(20 kHz,75 ns);재빙포광2.25 W(20 kHz,52 ns),PPMgLN겁화주기31.4 μm시,획득료426.1 mW 3.03 μm중홍외맥충격광수출;동시획득646.7 mW 1.64 μm신호광수출,총광광전화효솔체도47.6%.병차통과개변정체적겁화주기,실현료한빈광3.03～4.49 μm,신호광1.40～1.64 μm관대가조해수출.
We use an acousto-optic Q-switched Nd: YVO_4 laser as the pump source and obtain a Nd: YVO_4 / PPMgLN optical parametric generator (OPG).The threshold value of OPO system is only 0.5 W (20 kHz,75 ns)at 1064 nm.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 μm,and a signal laser output power of 646.7 mW at 1.64 μm have been achieved,and this corresponds to a whole optic-optic 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 1.40～1.64 μm.