【摘要】 利用耦合张量对光折变旋光,电光,压电及弹光铋硅族氧化物晶体中光波本征模的作用,在任意晶体切割面上求解了弱耦合的矢量波耦合方程,并利用有效耦合概念处理了非旋光晶体中的矢量波耦合问题.进而计算旋光和非旋光材料中信号光的增益,并分别比较各向同性耦合和各向异性耦合对增益的影响.对旋光材料优化增益,并把处理结果应用于BSO和BTO晶体.还讨论了压电和弹光效应对(110),(111)及(112)切割面优化增益的影响.更多还原

【Abstract】 We study the influence of vectorial wave coupling on the wave eigenmodes in an arbitrarily-cut photorefractive and optically active piezo-electric sillenite crystal, and solve the vectorial equations for weak two-wave coupling. We deal exactly with the vectorial wave coupling in an optically inactive piezo-electric crystal by solving the scalar equations. By doing so we calculate the signal gains in the optically active and the optically inactive crystals and discuss the contributions of the isotropic and the anisotropic coupling to the gain, respectively. We optimize the signal gain of the optically active crystal and apply the results to a BSO and BTO crystal.We also investigate the influence of the piezo-electric and elasto-optic effect on the optimum gain for (110),(111),(112) and their equivalent cuts.更多还原