非局域克尔介质中空间光孤子的相互作用  

Interaction between optical spatial solitons in nonlocal Kerr media

作　　者：谢逸群[1] 郭旗[1] 

机构地区：[1]华南师范大学信息光电子科技学院传输光学实验室,广州510631

出　　处：《物理学报》2004年第9期3020-3024,共5页Acta Physica Sinica

基　　金：广东省自然科学基金团队项目 (批准号 :2 0 0 0 3 0 61);广东省自然科学基金 (批准号 :0 114 5 5 ;0 3 15 16)资助的课题~~

摘　　要：研究了强非局域克尔介质中光束的演化规律 ,通过相位分析得到了空间孤子相互作用所满足的非局域非线性薛定谔方程的简化近似模型 ,并获得了双光束传输的解析解 .结果表明在传输过程中相互作用的高斯光束的相位决定于它们的输入总功率 .以振幅一强一弱共同传输的高斯光束为例进行了具体研究 ,得到了强光和弱光的解析式 ,相位分析显示弱光在相当短的传输距离之内能产生大的相移 。In this paper, it is discussed that a pair of optical beams co propagates in nonlocal Kerr media, which is governed by the nonlocal nonlinear Schrdinger equation (NNLSE). A new approximate linear model to the NNLSE is presented for the strong nonlocal Kerr media with arbitrary response functions. An analytical solution in Gaussian form to the model is obtained. It is shown that the phase of each of the two beams is depended on the total input power. As a concrete example, the interaction of two beams with the intensity of one of the beams much stronger than that of the other is discussed. It is found that the phase shift of the weaker (probe) beam is very large within rather short propagating distance in the case of soliton, which can be controlled by modulating the input power of the stronger (pump) beam.

关 键 词：非局域克尔介质 空间光孤子 孤子相互作用 相位调制 非线性薛定谔方程 高斯光束 

分 类 号：O437[机械工程—光学工程]