基于PPMgLN的中红外全固态可调谐光学参量振荡器  

Mid-Infrared Tunable All-Solid-State Optical Parametric Oscillator Based on PPMgLN

作　　者：檀慧明[1] 林洪沂[1,2] 张搏麟[3] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院研究生院,北京100049 [3]长春理工大学理学院,吉林长春130022

出　　处：《中国激光》2010年第9期2303-2308,共6页Chinese Journal of Lasers

基　　金：吉林省科技发展计划(200903053)资助课题

摘　　要：采用Nd∶YVO4固体激光器的1064 nm波长作为抽运源,在室温下实现了PPMgLN晶体准相位匹配的光学参量振荡器(OPO)输出。在连续工作模式下,OPO的抽运阈值为1.1 W,并在8.75 W的1064 nm连续抽运下获得了905 mW的3.2μm闲频光输出;在主动调Q的工作模式下,由平均功率为6.6 W的1064 nm脉冲激光抽运,获得了1.13 W的中红外波段闲频光输出,光-光转换效率达到17%。采用平均功率为1.15 W的Cr∶YAG被动调Q的1064 nm脉冲激光抽运,获得了125 mW的中红外脉冲激光输出。通过改变晶体的极化周期,实现了闲频光3.13～4.20μm中红外宽带可调谐的连续和脉冲激光输出,并在主动调Q脉冲激光作为抽运光源时,测量了相应OPO的分立输出光谱、波长调谐间隔和光谱带宽。An optical parametric oscillator（OPO）,which is pumped by a Nd∶YVO4 laser with the 1064 nm wavelength,is obtained based on PPMgLN.For the continuous wave（CW） operation mode,the threshold is only 1.1 W and the output power of idler at 3.2 μm is 905 mW.For the active Q-switched operation mode,the average output power at mid-infrared wavelength is 1.13 W,which corresponds to an optical-optical conversion efficiency of 17%.For the passively Q-switched operation mode with a Cr∶YAG saturable absorber in the cavity of Nd∶YVO4 laser,the average output power of idler from OPO at the mid-infrared wavelength is 125 mW.By changing the periods of the domain structure on the PPMgLN wafer,a widely tunable mid-infrared spectrum from 3.13 to 4.20 μm is obtained.

关 键 词：激光器 光学参量振荡器 PPMGLN晶体 中红外可调谐激光器 连续和脉冲激光输出 

分 类 号：TN248.1[电子电信—物理电子学]