高阶色散情况下光纤中基黑孤子传输特性的变分研究  

A variational study about the propagation properties of the fundamental black soliton in optical fibers with higher-order dispersion

作　　者：张季[1] 罗开基[1] 

机构地区：[1]安徽新华学院,江西师范大学物理与通信电子学院,合肥230088,江西南昌330027

出　　处：《激光杂志》2008年第3期48-49,共2页Laser Journal

基　　金：江西省重点实验室开放基金(2004007)资助项目;安徽高等学校省级自然科学研究项目(KJ2008B265);安徽省青年教师资助计划项目(2008g1183)

摘　　要：本文从含修正项的非线性薛定谔方程出发,采用变分法,导出了光纤零色散附近高阶色散微扰影响下,基黑孤子脉冲参数随传输距离的演化方程组及其解析解。结果表明:高阶色散影响下,孤子脉宽比不存在高阶色散时加大,但振幅、频率、脉宽不随传输距离变化,因此基黑孤子能够保形传输,比明孤子具有更好的稳定性。In this paper, using the variational principle we deduced the evolution and its resolutions of the fundamental black soliton pulse close to zero - dispersion in the single - model fibers with higher - order dispersion, based on the modified NLS equation; We find out the frenquency band wbidth of soliton became wider than the situation without the higher order dispersion. But the amplitude and frequency bandwidth do not change with the distance of propagation. So the fundamental black soliton stand more stable obviously than bright soliton.

关 键 词：纤维与导波光学 变分法 高阶色散 基黑孤子 传输特性 

分 类 号：TN248.1[电子电信—物理电子学]