激光与光电子学进展, 2019, 56 (2): 020602, 网络出版: 2019-08-01
单通道与多通道多极格子孤子及其动力学行为 下载: 972次
Properties and Dynamical Behaviors of Single-Channel and Multi-Channel Multi-Polar Lattice Solitons
光通信 空间光孤子 光格子 光学传输 多极孤子 optical communications optical spatial soliton optical lattice optical transmission multi-polar soliton
摘要
基于非线性薛定谔方程,研究了具有光格子的局域非线性介质中存在的单通道和多通道多极格子孤子的光场分布、稳定性和动力学行为。研究发现,系统中存在同相和反相2种类型的多通道多极格子孤子;在单通道情形下,只存在反相多极格子孤子,同相的多极格子孤子不存在;在3种类型的格子中,同相多极格子孤子的稳定性最差,而多通道反相多极格子孤子的稳定性最高。在撤去光格子的情况下,3类格子孤子呈现出不同的动力学行为。同相多极格子孤子分裂成相应数目的光束后,或合并成1个光束、或能量重新分配、或周期性碰撞。而反相多极格子孤子分裂后,光束相互排斥,2个边带光束沿直线路径向前传输,且轨迹与原传播方向的夹角相等;在传播常数较小时,可能会出现光束弥散。这些性质对全光路由、全光开关等全光控制技术的研究有一定的参考作用。
Abstract
Based on nonlinear Schr dinger equation, we research the light field properties, including the distribution and the stability, and dynamical behaviors of multi-polar lattice solitons, distributed on a single channel or across different channels in nonlinear media with optical lattices. These survey results indicate that there are two kinds of multi-polar solitons such as in-phase soliton and out-of-phase soliton in such systems. Significantly, multi-polar lattice soliton distributed on a single channel can only be out-of-phase, but an in-phase multi-polar lattice soliton is not allowed. Among three kinds of multi-polar lattice solitons, stability of in-phase multi-polar lattice soliton is the worst, and that of out-of-phase multi-polar lattice soliton distributed across different channels is the best. If optical lattice is removed, three kinds of multi-polar lattice solitons present different dynamical behaviors. After the optical lattice is removed, an in-phase multi-polar lattice soliton first splits into a corresponding number of light beams, and then they merge into one beam, or their energy is redistributed, or they collide periodically. Nevertheless, the out-of-phase multi-polar lattice soliton splits into several light beams, and then the beams repel each other, in which two side light beams transmit forwards along their respective straight trajectories, and the angle between any of their straight trajectories and its original direction of propagation is equal; especially, light beams, generated from the fission of out-of-phase multi-polar lattice soliton with a small propagation constant, may diffuse when the optical lattice is withdrawn. These results may have certain value to all-optical controlling techniques such as all-optical routing and all-optical switching.
张华峰, 李继军, 陈方, 郁春潮, 孙利辉. 单通道与多通道多极格子孤子及其动力学行为[J]. 激光与光电子学进展, 2019, 56(2): 020602. Huafeng Zhang, Jijun Li, Fang Chen, Chunchao Yu, Lihui Sun. Properties and Dynamical Behaviors of Single-Channel and Multi-Channel Multi-Polar Lattice Solitons[J]. Laser & Optoelectronics Progress, 2019, 56(2): 020602.