利用AgGaS_2与AgGaSe_2晶体差频获得中红外射线的性能研究  

Properties of mid-infrared radiation of difference frequency generation on AgGaS_2 and AgGaSe_2 crystal

作　　者：宋玥[1] 王丽[1] 

机构地区：[1]北京工业大学应用物理系,北京100022

出　　处：《激光杂志》2007年第4期28-29,共2页Laser Journal

基　　金：北京市自然科学基金(4062008)

摘　　要：根据差频过程中参量光的三波耦合方程,对非线性晶体AgGaSe_2和AgGaS_2进行了差频光参量理论分析。经过数值模拟计算,得到了在Ⅰ类和Ⅱ类相位匹配条件下,泵浦波长分别取不同值时差频调谐波长与调谐角度的理论曲线。在Ⅰ类相位匹配条件下,当PPLN—OPA的泵浦波长为1064nm时,AgGaS2与AgGaSe_2的调谐波长范围,分别是4～13μm和4～18μm,其对应的调谐角度范围分别是31.8～37.3和43.4、61.55度。A different frequency generation of nonlinear optical crystals of AgGaSe2 and AgGaS2 has been analyzed based on the three - wave coupled equation and energy conservation in the phase - matching of type - Ⅰ and type - Ⅱ. The theoretical curves of tunable wavelengths of different frequency generatien with phase - matching angle have been obtained by numerical simulation. The tuning wavelength ranges of 4 - 13μm and 4 - 18μm for the AgGaSe2 and AgGaS2 crystal respectively with tuning angle ranges of 31.8 - 37.3 and 43.4 - 61.55 degree have presented as the pump wavelength used 1064nm for LiNbO3 optical parametric oscillator（ LN OPO）.

关 键 词：频率转换 差频过程 相位匹配 AgGaSe2 AGGAS2 

分 类 号：O734[理学—晶体学]