CAJ | 학술논문

报道了一种基于周期性极化晶体PPMgLN、连续波、线性外腔结构、宽带可调谐单谐振光学参量振荡器.泵浦源采用LDA端面泵浦的Nd:YVO4连续波1.064 μm激光器,并通过优化泵浦光与信号光的模式匹配,获得了低阈值、高效率的中红外激光输出.光参量振荡阈值仅为1.09 W,是目前采用外腔结构所报道的最低值.在泵浦功率4.55 W时,可以获得最大功率为346.8 mW、波长为3.202 μm激光输出,中红外光的光光转化效率达到了7.6%.并通过改变PPMgLN晶体的极化周期,可以实现中红外2.98～4.19 μm宽带可调谐激光输出.此中红外激光器结构简单紧凑,可以室温运行.
보도료일충기우주기성겁화정체PPMgLN、련속파、선성외강결구、관대가조해단해진광학삼량진탕기.빙포원채용LDA단면빙포적Nd:YVO4련속파1.064 μm격광기,병통과우화빙포광여신호광적모식필배,획득료저역치、고효솔적중홍외격광수출.광삼량진탕역치부위1.09 W,시목전채용외강결구소보도적최저치.재빙포공솔4.55 W시,가이획득최대공솔위346.8 mW、파장위3.202 μm격광수출,중홍외광적광광전화효솔체도료7.6%.병통과개변PPMgLN정체적겁화주기,가이실현중홍외2.98～4.19 μm관대가조해격광수출.차중홍외격광기결구간단긴주,가이실온운행.
We report a linear extra-cavity, tunable mid-infrared, Continuous Wave (CW) singly resonant Optical Parametric Oscillator (OPO) based on periodically poled MgO-doped LiNbO3 (PPMgLN). A Nd:YVO4 laser pumped by 808 nm LDA is used as the pump source. The threshold of OPO system is only 1.09 W at 1 064 nm. A maximum idle laser output power of 346.8 mW at 3.202 urn has been achieved when the pump power is 4.55 W and it corresponds to an (only idler) optic-optic conversion efficiency of 7.6%. By shifting the PPMgLN crystal, the periods of the domain structure on the PPMgLN wafer can be changed, thus enabling a mid-infrared spectral widely tuning range of the laser output from 2.98～4.19 μm. This laser is very compact, simple and operated at room temperature.