| 光折变介质中空间光孤子自弯曲现象研究 |
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| 引用本文： | 董亮伟,马利红,王辉.光折变介质中空间光孤子自弯曲现象研究[J].光学学报,2007,27(8):1485-1489. |
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| 作者姓名： | 董亮伟 马利红 王辉 |
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| 作者单位： | 1. 浙江师范大学数理与信息工程学院,金华,321004;浙江师范大学信息光学研究所,金华321004
2. 浙江师范大学信息光学研究所,金华,321004 |
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| 基金项目： | 国家自然科学基金(10575087)，浙江省自然科学基金(Y105061)资助的课题 |
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| 摘 要： | 光折变非线性介质在外加直流电压时会引起介质内部电荷移动,而移动后的电荷又会导致空间电荷的扩散效应,从而产生非局域非线性现象。从理论上研究了具有流动和扩散非局域非线性的光折变晶体中所支持的空间光学孤子的传播行为。应用等效粒子近似方法分析了这类介质中(1 1)维空间光学孤子动力学行为,得出孤子运动"加速度"显式解。孤子的有效"加速度"决定于孤子参量和光折变非局域参量。所得的解析结果可在一定参量范围内直接用来计算孤子的传播轨迹。对孤子在光折变非局域非线性作用下的传播动力学行为做了仿真模拟,数值模拟结果与理论分析结论符合得很好。
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| 关 键 词： | 非线性光学 光与物质相互作用 等效粒子近似方法 空间孤子 |
| 文章编号： | 0253-2239（2007）08-1485-5 |
| 收稿时间： | 2006/10/8 |
| 修稿时间： | 2006-10-08 |
Self-Bending Effect of Spatial Soliton in Photorefractive Medium |
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| Dong Liangwei,Ma Lihong,Wang Hui.Self-Bending Effect of Spatial Soliton in Photorefractive Medium[J].Acta Optica Sinica,2007,27(8):1485-1489. |
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| Authors: | Dong Liangwei Ma Lihong Wang Hui |
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| Institution: | 1.College of Mathematics, Physics and Information Engineering, Zhejiang Normal University, Jinhua 321004 ;2 .Institute of Information Optics, Zhejiang Normal University, Jinhua 321004 |
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| Abstract: | Internal charge drift is induced by applying an external electric field on the photorefractive crystal.The drifted charges may lead to the diffusion of spatial charges which accounts for the nonlocal nonlinearity.The propagation of spatial soliton supported in the photorefractive medium with drift and diffusion nonlinearity is investigated theoretically.The effective "acceleration" of soliton is derived by analyzing the dynamics of the(1 1) dimensional spatial soliton in this kind medium with equivalent-particle approximation methods.The parameters of input soliton and nonlocality determine the effective acceleration of soliton.The results can be used to calculate the propagation trajectory of solitons in a certain parameter range.We also simulate the propagation of soliton under perturbation of nonlocal nonlinearity.The theoretical analysis results are in good agreements with the numerical simulation results. |
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| Keywords: | nonlinear optics light-matter interaction equivalent-particle approach methods spatial soliton |
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