【摘要】 采用1 064 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. 8μm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30μm,晶体温度75℃时实现了1. 25W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.更多还原

【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.更多还原