自聚焦光伏光折变晶体中奇偶间隙孤子序列研究  

Study on Sequence of Odd and Even Gap Solitons in Self-Focusing Photovoltaic-Photorefractive Crystals

作　　者：高立许 卢克清[1,2] 赵冲[1,2] 惠娟利[1,2] 陈卫军[1,2] 

机构地区：[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

出　　处：《中国激光》2017年第9期249-254,共6页Chinese Journal of Lasers

基　　金：天津市自然科学基金(13JCYBJC16400)

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。The formation and the stability of the sequence of odd and even gap solitons in selbfocusing photovoltaic- photorefraetive 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.

关 键 词：非线性光学 间隙孤子 波导阵列 光折变晶体 

分 类 号：O437[机械工程—光学工程]