种子注入双共振PPMgLN光参量振荡器  

Injection Seeded Doubly Resonant Optical Parametric Oscillator Based on PPMgLN

作　　者：董怡静 马秀华[1] 李世光[1] 朱小磊[1] 谢小兵[1,2] 张俊旋 

机构地区：[1]中国科学院上海光学精密机械研究所空间激光信息传输与探测技术重点实验室,上海201800 [2]中国科学院大学,北京100049

出　　处：《中国激光》2017年第8期18-24,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(61475170;61505230);上海市自然科学基金(12ZR1435100)

摘　　要：报道了一种种子注入式PPMgLN外腔双共振环形腔光参量振荡器。抽运光偏振方向在PPMgLN晶体(MgO物质的量分数为5%)内满足e→e+e相位匹配,有效利用了晶体的最大非线性系数d33(25pm·V-1)。以重复频率为400Hz、功率为556mW、波长为1064nm的单频脉冲激光作为抽运源,在晶体极化周期为30.5μm、温度为110℃的条件下,获得了平均功率为79mW的1.57μm信号光和平均功率为38.5mW的3.3μm空闲光输出,抽运光-参量光的总转换效率可达22%。采用种子激光注入技术获得了单频窄线宽参量光输出,实验测得1.57μm信号光输出的线宽小于100 MHz,10min内频率漂移不超过141 MHz。An injection-seeded, doubly resonant ring cavity optical parametric oscillator based on PPMgLN crystal is presented. The pump beam polarization matches the e→e＋e interaction in PPMgLN crystal （doped MgO with mole fraction of 5%）, and thus makes the maximal nonlinear coefficient d33 （25 pm ·V^-1） effective. Using single- frequency pulsed laser with repetition frequency of 400 Hz , wavelength of 1064 nm and output power of 556 mW as pumping source, we obtain an average output power of 79 mW at the wavelength of 1.57 /am and output power of 38.5 mW at the wavelength of 3.3 μm when the crystal grating period is 30.5 /am and temperature is 110 ℃, corresponding to a total conversion efficiency of 22%. By using the seed laser injection technology, we obtain singlefrequency narrow linewidth laser output, the linewidth of the signal laser with wavelength of 1.57 μm is less than 100 MHz, and the frequency drift is less than 141 MHz in 10 minutes.

关 键 词：激光光学 双共振光学参量振荡器 种子注入 PPMGLN晶体 单频激光 

分 类 号：TN248.1[电子电信—物理电子学]