有偏压的光伏光折变晶体中的空间灰孤子  

GRAY SPATIAL SOLITONS IN PHOTOVOLTAIC PHOTOREFRACTIVE CRYSTALS IN AN EXTERNAL BIAS FIELD

作　　者：卢克清[1] 朱京平[1] 张彦鹏[1] 唐天同[1] 侯洵[2] 张禄[1] 

机构地区：[1]西安交通大学电子科学与技术系 [2]中国科学院西安光学精密机械研究所瞬态光学技术国家重点实验室,西安710068

出　　处：《光子学报》2001年第5期546-549,共4页Acta Photonica Sinica

基　　金：国家自然科学基金! ( 60 0 0 70 0 6);瞬态光学技术国家重点实验室基金! ( YAK2 0 0 0 6)资助项目

摘　　要：正和完善了有偏压的光伏光折变晶体中空间孤子的非线性波动方程的理论 .当光伏效应可忽略时 ,它转化为屏蔽孤子的非线性波动方程 ;当外电场为零时 ,它转化为闭路和开路光伏孤子的非线性波动方程 .证明了有偏压的光伏光折变晶体中存在着空间灰孤子 .它起源于对外电场的非均匀空间屏蔽和光伏效应 .当光伏效应可忽略时 ,它转化为屏蔽灰孤子 ;当外电场为零闭路时 ,它预言了在光伏光折变晶体中存在着光伏灰孤子 .The theory of the nonlinear wave equatian of spatial solitons is revised and perfected in biased photovoltaic photorefractive crystals.In case photovoltaic effect is neglected,it is the nonlinear wave equation of screening solitons.In case the external bias field is absent,it is the nonlinear wave equation of photovoltaic solitons in the closed and open circuit case.Gray spatial solitons are predicted in biased photovoltaic photorefractive crystals,which result form both the spatially nonuniform screening of the external bias field and the photovoltaic effect.In case photovoltaic effect is neglected,these gray solitons are gray screening solitons.In case the external bias field is absent for a closed circuit,these gray solitons predict gray solitons in photovoltaic photorefractive crystals.

关 键 词：光伏效应 光伏光折变晶体 空间灰孤子 非线性波动方程 外电场 

分 类 号：O431[机械工程—光学工程] O734[理学—光学]