双光子光折变晶体串联回路中独立全息屏蔽空间孤子对

Separate Holographic Soliton Pairs in a Biased Series Two-Photon Photorefractive Crystal Circuit

为了得到双光子独立全息屏蔽空间孤子对的结果,基于光折变晶体中的两波耦合和双光子光折变效应,证明在由两块双光子光折变晶体和一个电压源通过导线连接组成的串联回路中存在全息亮(暗)屏蔽孤子。每块晶体中能支持一个全息屏蔽孤子,这两个孤子称为双光子独立全息屏蔽孤子对,有明-明、暗-暗和明-暗三种类型。数值计算结果表明,在光束的空间展宽远小于晶体宽度的极限条件下,孤子对中的两孤子通过光电流和相互耦合能影响到这些孤子的空间包络和动态演化特性。

In order to study the two-photon separate holographic soliton pairs,based on the two-wave coupling and two-photon photorefractive effect in photorefractive crystals,holographic bright（dark） screening solitons are predicted in a series circuit consisting of double two-photon photorefractive crystal connected electronically by electrode in a chain with a voltage source.Each crystal can support a holographic screening soliton.The two solitons are known as a separate holographic two-photon screening soliton pair and there are three types： dark-dark,bright-bright and bright-dark.Numerical calculation results show that two solitons in a soliton pair can affect each other by light-induced current and coupling effects,which can affect the normalized spatial and the dynamical evolutions of solitons under the limit of the spatial extent of the optical beam is much less than the width of the crystal.