中国激光, 2017, 44 (9): 0908001, 网络出版: 2017-09-07   

自聚焦光伏光折变晶体中奇偶间隙孤子序列研究 下载: 840次

Study on Sequence of Odd and Even Gap Solitons in Self-Focusing Photovoltaic-Photorefractive Crystals
高立许 1,2,*卢克清 1,2赵冲 1,2惠娟利 1,2陈卫军 1,2
作者单位
1 天津工业大学光电检测技术与系统天津市重点实验室, 天津 300387
2 天津工业大学电子与信息工程学院, 天津 300387
摘要
研究了自聚焦光伏光折变晶体中奇偶间隙孤子序列的形成及其稳定性。这些间隙孤子只存在于半无限间隙内, 它们的存在区域随其阶数的增加而减少, 阶数高的间隙孤子占据更多的格子。这些间隙孤子的能流值随传播常数的增大而增大, 给定一传播常数, 阶数高的间隙孤子具有高的能流值。对高阶间隙孤子, 边瓣强度大, 中间各瓣强度相等, 改变传播常数能够控制边瓣和中间瓣的强度。用数值计算方法研究了这些间隙孤子的稳定性, 发现它们都是稳定的。
Abstract
The formation and the stability of the sequence of odd and even gap solitons in self-focusing photovoltaic-photorefractive crystals are studied. These gap solitons only exist in semi-infinite gaps, and their existence domain decreases with the increase of their orders. The gap solitons with higher order occupy more lattices. The energy flow value of these gap solitons increases with the increase of propagation constant. Given a propagation constant, gap solitons with higher order have higher energy flow value. For high-order interphase solitons, the intensities of side lobes are larger and the intensities of the middle lobes are the same. The intensities of side and middle lobes can be controlled by changing the propagation constant. The stability of these gap solitons is investigated numerically and they are proved to be stable.

高立许, 卢克清, 赵冲, 惠娟利, 陈卫军. 自聚焦光伏光折变晶体中奇偶间隙孤子序列研究[J]. 中国激光, 2017, 44(9): 0908001. Gao Lixu, Lu Keqing, Zhao Chong, Hui Juanli, Chen Weijun. Study on Sequence of Odd and Even Gap Solitons in Self-Focusing Photovoltaic-Photorefractive Crystals[J]. Chinese Journal of Lasers, 2017, 44(9): 0908001.

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