红外与毫米波学报, 2019, 38 (2): 02195, 网络出版: 2019-05-10  

基于单谐振光参量振荡器产生可调谐中红外双频激光的研究

Tunable Mid-IR dual frequency laser based on a single-resonant optical parametric oscillator
作者单位
1 北京理工大学 光电学院, 北京 100081
2 精密光电测试仪器及技术北京市重点实验室, 北京 100081
摘要
采用1064 nm双频连续激光泵浦基于周期极化铌酸锂晶体的单谐振光参量振荡器实现了双频中红外激光输出, 通过调节晶体的温度和极化周期, 实现了输出波长在3~3.8 μm范围可调谐.双频中红外激光的拍频与泵浦光拍频相同, 调谐范围为125~175 MHz.在泵浦光功率为6.9 W, 晶体极化周期30 μm, 晶体温度75℃时实现了1.25 W的双频中红外激光输出, 泵浦光-闲频光的最高转换效率为18.2%.通过调节双频激光的功率比, 可以改变输出中红外双频激光的调制深度.
Abstract
A Tunable Mid-IR dual frequency laser based on single-resonant optical parametric oscillator is presented. The mid-infrared wavelength tunability of 3~3.8 μm is achieved by adjusting the temperature and polarization period of MgO:PPLN crystal. When the pump power is 6.9 W and the temperature of the MgO:PPLN is 75℃, output power of 1.25 W is obtained. The highest optical-optical conversion efficiency of the idler light with respect to pump light is 18.2%. The beat note frequency is equal to the beat note frequency of the pump, which can be tuned from 125 to 175 MHz. The modulation index of the beat note of idle could be adjusted with different dual-frequency power radio of pump.
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李坤, 杨苏辉, 王欣, 李卓, 张金英. 基于单谐振光参量振荡器产生可调谐中红外双频激光的研究[J]. 红外与毫米波学报, 2019, 38(2): 02195. LI Kun, YANG Su-Hui, WANG Xin, LI Zhuo, ZHANG Jin-Ying. Tunable Mid-IR dual frequency laser based on a single-resonant optical parametric oscillator[J]. Journal of Infrared and Millimeter Waves, 2019, 38(2): 02195.

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