宽波段连续调谐全固态CW PPMgLN光学参量振荡器  

Continuously board-waveband tunable all-solid-state CW optical parametric oscillator based on PPMgLN

作　　者：姚文明[1,2,3] 檀慧明[1,3] 田玉冰[3] 崔锦江[3] 王帆[3] 董宁宁[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,长春130033 [2]中国科学院大学,北京100049 [3]中国科学院苏州生物医学工程技术研究所,江苏苏州215163

出　　处：《强激光与粒子束》2013年第8期2021-2026,共6页High Power Laser and Particle Beams

基　　金：苏州市科技发展计划项目(SYG201208);吉林省科技发展计划项目(200903053)

摘　　要：利用半导体激光泵浦输出1064 nm波长的全固态连续Nd:YVO4激光器作为泵浦源,采用周期调谐和温度调谐组合调谐技术,对基于掺氧化镁周期性极化铌酸锂晶体(MgO:LiNbO3,PPMgLN)准相位匹配(QPM)的全固态连续波(CW)光学参量振荡器(OPO)宽波段无分立连续调谐输出特性进行研究。实验采用连续工作模式和外腔结构,基于多周期PPMgLN晶体的30.2,30.4和30.6μm周期,在改变晶体的极化周期的基础上,同时在30～100℃范围内调节晶体工作温度。实验结果表明:CW PPMgLN OPO的泵浦阈值仅为0.22W;不同极化周期需要的温度调谐范围不同;信号光在1 559.8～1 597.2 nm近红外波段和闲频光在3187.3～3 347.3 nm中红外波段连续调谐输出。实现了外腔式全固态CW OPO在信号光和闲频光波段的无分立连续调谐输出。The output characteristics of a multi-wavelength tunable optical parametric oscillator （OPO） pumped by an all solid-state Nd..YVO4 laser with the 1064 nm wavelength is investigated by quasi-phase-matching period tuning and temperature tuning technology. An experiment is carried out by using an external cavity structure and continuous wave （CW） operation mode, and changing the periods and temperature of a periodically poled MgO： LiNO3 crystal （PPMgLN） from 30 to 100 ℃ with 30.2 um, 30.4 um and 30.6 #m grating period. The experimental results indicate that the threshold of the CW PPMgLN OPO is only 0.22 W and the different poling period needs different temperature-tuned range, and the continuously tunable near-infrared spec trum from 1 559.8 to 1 597.2 nm and mid-infrared spectrum from 3 187.3 to 3 347.3 nm are obtained. A continuously tunable PPMLN-OPO at the signal and idler wavelength is realized.

关 键 词：光学参量振荡器 激光器 PPMGLN晶体 准相位匹配 连续调谐输出 

分 类 号：TN248.1[电子电信—物理电子学]