内腔连续波1.9μm和2.4μm双波长输出光参量振荡器  

Intracavity Continuous-Wave Optical Parametric Oscillator with 1.9 μm and 2.4 μm Dual-Wavelength Output

作　　者：孙鑫[1,2] 毕勇[1] 颜博霞[1] 郑光[1] 王栋栋 王皓[1,2] 亓岩[1] 房涛[1] 

机构地区：[1]中国科学院光电研究院,北京100094 [2]中国科学院大学,北京100049 [3]北京中视中科光电技术有限公司,北京100086

出　　处：《中国激光》2013年第3期47-50,共4页Chinese Journal of Lasers

基　　金：国家863计划(2009AA032701;2009AA032706)资助课题

摘　　要：报道了一个内腔式连续波、单谐振1.9μm和2.4μm双波长激光输出的光参量振荡器(OPO)。实验采用单管半导体激光二极管(LD)抽运掺钕钒酸钇(Nd…YVO4)晶体,腔内抽运掺氧化镁的周期性极化铌酸锂(PPMgLN)晶体,得到1.9μm和2.4μm双波长连续激光输出。在室温下,当LD功率为5.5 W时,同时获得了750mW、1.9μm波长的信号光和370mW、2.4μm波长的闲频光输出,光-光转换效率分别为13.6%和6.7%,总的转换效率达到了20%以上。测试5h,功率不稳定性小于1.8%。另外还对不同长度的PPMgLN晶体进行了阈值和转换效率的特性分析。通过输出波长稳定性测试发现,对晶体的温度进行更好地控制,可以改善波长漂移的现象。An intracavity continuous-wave singly resonant optical parametric oscillator （OPO） with wavelengths of 1.9 μm and 2.4 μm is demonstrated. The 1. 9 μm and 2.4 μm dual-wavelength continuous lasers are obtained through intracavity pumping the MgO-doped periodically poled LiNb03 （PPMgLN） and yttrium vanadate （Nd： YVO4 ） crystal with a single semiconductor laser diode （LD）. 750 mW signal wave at 1.9 μm and 370 mW idler wave at 2.4 μm, are simultaneously obtained when the LD power is 5. 5 W at room temperature. The corresponding conversion efficiencies are 13.6 % and 6.7% respectively, so the whole efficiency is more than 20%. The output power instability is no more than 1.8 % over a measurement period of 5 h. Additionally, the threshold characteristics and conversion efficiency of PPMgLN crystal with different lengths are analyzed. By output wavelength stability test, it is found that better control of the temperature of crystal can improve the phenomenon of wavelength drift.

关 键 词：非线性光学 光参量振荡器 双波长激光器 连续波 准相位匹配 掺氧化镁的周期性极化铌酸锂晶体 

分 类 号：TN248.1[电子电信—物理电子学]