2.05μm单谐振纳秒脉冲光参量振荡器特性研究  

Characteristics of Single Resonant Nanosecond Pulse Optical Parametric Oscillator with Output Wavelength of 2.05 μm

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

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》2016年第12期228-232,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(61505230)

摘　　要：报道了1064nm单频激光抽运的KTP晶体外腔单谐振光参量振荡器(OPO),获得了波长为2.05μm的纳秒激光脉冲输出。在平-平腔中,将2块II类相位匹配KTP晶体按走离补偿方式放置,在400 Hz重复频率下,抽运单脉冲能量达到5mJ时获得了单脉冲能量为0.9mJ的2.05μm信号光输出,其脉宽约为3.7ns,对应抽运光-信号光转换效率约为18%,光束质量因子M^2在x、y方向分别为2.08、3.03。A KTP crystal extra-cavity single-resonant optical parametric oscillator （OPO） pumped by 1064 nm single-frequency laser is reported, and the nanosecond laser pulse output with wavelength of 2.05μm is obtained. In the plane-parallel cavity, two type II phase-matched KTP crystals are placed in walk-off-compensated mode. When the pump single pulse energy reaches 5 mJ at repetition frequency of 400 Hz, a 2.05 μm signal laser output with single pulse energy of 0. 9 mJ is obtained, whose pulse width is about 3. 7 ns, the corresponding conversion efficiency is about 18% from pump light to signal light, and the beam quality factor Mz are 2.08, 3.03 in x, y directions, respectively.

关 键 词：非线性光学 光参量振荡器 2μm激光器 KTP晶体 

分 类 号：TN248.1[电子电信—物理电子学]