【摘要】 对基于周期极化掺氧化镁的铌酸锂(PPMgO:CLN)晶体的光参量放大器(OPA)进行了理论分析和实验研究。模拟了PPMgO:CLN晶体准相位匹配(QPM)波长-温度调谐曲线和OPA中各光波平均功率随晶体长度的变化曲线,并进一步分析了最佳晶体长度的影响因素。当常温极化周期为31.3μm的PPMgO:CLN晶体工作在150℃时,用平均功率为44W的调Q Nd:YAG激光器抽运OPA,注入OPA内的2.765μm激光的功率由4W定标放大至13.3W,转换效率为21.14%。更多还原

【Abstract】 The theoretical analysis and experimental research of the optical parametric amplifier(OPA) based on periodically poled MgO:LiNbO3(PPMgO:CLN) are presented.The quasi-phase-mathed(QPM) wavelength-temperature tuning curves and the curves of average power of each light versus crystal length are simulated,and the influencing factors of optimum length are investigated.When the crystal with grating period of 31.3 μm is operated at 150 ℃ and the OPA stage is pumped by a Q-switched Nd:YAG laser with average power of 44 W,the input idle power of 4 W at 2.765 μm is amplified by 13.3 W,and the conversion efficiency is 21.14%.更多还原