基于铌酸锂晶体电光效应的差频转换效率调制  

Conversion efficiency modulation of difference-frequency generation based on electro-optic effect in lithium niobate crystal

作　　者：孔艳[1] 张秀梅[1] 高淑梅[1] 

机构地区：[1]江南大学理学院光信息学与技术系,无锡214122

出　　处：《激光技术》2012年第6期836-839,共4页Laser Technology

基　　金：中央高校基本科研业务费专项资金资助项目(JUSRP111A20);国家自然科学基金资助项目(60908041)

摘　　要：为了在差频过程中得到较高的转换效率,利用铌酸锂晶体的电光效应来改变晶体的折射率,进而在非线性过程中调整位相失配量来实现差频转换效率的调制,模拟了外加电场对差频转换效率的影响。结果表明,利用铌酸锂晶体的电光效应,可以在任意给定抽运光强的情况下,获得较高的差频转换效率。这一结果对于获得新的中红外光源是非常有益的。It is always expected that the conversion efficiency is as high as possible for nonlinear interaction at any pump intensity. A method was presented to control the conversion efficiency of difference-frequency generation （DFG） in the periodic poled lithium niohate, by modulating the refractive index induced by electro-optic effect. The variation of DFG conversion effieciency with the external electric field was simulated. The calculated results indicate that this method is feasible and very efficient in attaining the high conversion efficiency at any given pump intensity. This resuh is very useful to get new lasers especially in mid-infrared region.

关 键 词：非线性光学 差频 电光效应 准位相匹配 转换效率 

分 类 号：O734.1[理学—晶体学]