基于光折变双光束耦合的刚性全息明孤子的温度依赖特性研究  

Study of temperature characteristic of rigid holographic bright solitons based on photorefractive two-wave mixing

作　　者：张光勇[1] 刘劲松[1] 刘时雄[1] 张绘蓝[1] 王程[1] 

机构地区：[1]华中科技大学光电子科学与工程学院激光技术国家重点实验室

出　　处：《物理学报》2007年第6期3266-3271,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10174025;10574051);中国地质大学(武汉)优秀青年教师资助计划(批准号:CUGQNL0621)资助的课题~~

摘　　要：研究了基于双光束耦合的光折变耗散系统中全息明孤子的温度演化特性.数值计算结果表明,晶体温度与刚性全息孤子的稳定性密切相关.在一定温度下,全息孤子能在晶体中传播足够远的距离;当晶体温度漂移不大时,入射孤子能演化成稳定的全息孤子继续传播;而当晶体温度变化足够大时,孤子波强度随传播距离增加或减小,入射孤子不能以稳定的全息孤子态传播.讨论了将刚性全息孤子的温度特性应用于光学衰减、中继器件的可能性.The temperature dependence of the dynamical evolution of rigid holographic bright solitons in photorefractive dissipative systems based on two-wave mixing is studies. Numerical results show that the stability of rigid holographic bright solitons in such systems depends strongly on the crystal temperature. The soliton formed at a given temperature can propagate stably in the crystal over a distance that is long enough. The input solitary beam can evolve into a stable soliton and propagate in the crystal when the temperature drift is quite small, whereas it will not evolve into a stable soliton and its intensity becomes increasing or decreasing with propagation if the temperature difference is large. A potential application of temperature properties of rigid holographic solitons in optical attenuators or repeaters is discussed.

关 键 词：空间光孤子 光折变非线性光学 耗散系统 全息聚焦 

分 类 号：O437[机械工程—光学工程]