光纤光栅中孤子时延特性研究  

Research on Time-Delay Characteristics of Solitons in Fiber Bragg Grating

作　　者：王葵如[1] 程洁琳[1] 陈功[1] 饶岚[1] 桑新柱[1] 

机构地区：[1]北京邮电大学信息光子学与光通信教育部重点实验室,北京100876

出　　处：《光学学报》2011年第2期197-201,共5页Acta Optica Sinica

基　　金：国家自然科学基金(60677003)资助课题

摘　　要：从光纤光栅慢光产生的物理机理和非线性耦合模方程组,仿真分析了均匀布拉格光栅中光栅孤子传输时的减速特性;利用高速示波器搭建了测量高能量、窄脉冲通过布拉格光纤光栅后时延特性的实验系统,分别测量了由普通单模光纤和高非线性光纤制作的均匀光栅对光脉冲的时延特性。实验结果为:用5 cm长普通单模光纤制作的布拉格光栅可以使在其中传输的光脉冲产生426 ps的时延,而相同长度高非线性布拉格光纤光栅对光脉冲的时延量为1.639 ns。计算后可知,光脉冲在对应光栅中的传输速度分别约为1.17×108m/s和0.31×108m/s。结果说明光纤光栅能够实现光速减慢,而且高非线性光纤光栅对光脉冲的减速效果要好于普通单模光纤制作的光栅。Based on slow light theory and nonlinear coupled-mode equations of fiber Bragg grating, the characteristics of the velocity when Bragg grating （BG） solitons transmitting through fiber Bragg grating （FBG） are simulated. The time delay of the BG solitons is measured by an experimental system, which based on the high-speed oscilloscope. The time delay of the high-intensity narrow pulses propagating in the BG is acquired. The results show that, with BG on ordinary signal-mode fiber of 5 cm long, the time-delay is 426 ps and its speed is 1.17×10^8 m/s, and that in other case, when the fiber has high nonlinearity, the time delay is 1. 639 ns, and the speed of the BG soliton is 0.31 × 10^8 m/s. Thus, the deceleration of the BG soliton is possible, and the velocity with that the soliton tansmitts through the high nonlinear FBG is lower than that through the ordinarv signal-mode FBG

关 键 词：非线性光学 慢光 时延 布拉格光栅孤子 光纤光栅 

分 类 号：O436[机械工程—光学工程]