基于光子晶体光纤中脉冲俘获的超高速光开关  

Ultrafast All Optical Switching Based on Pulse Trapping in Photonic Crystal Fibers

作　　者：李善甫[1] 文双春[1] 

机构地区：[1]湖南大学计算机与通信学院,长沙410082

出　　处：《光子学报》2007年第2期270-274,共5页Acta Photonica Sinica

基　　金：教育部新世纪优秀人才支持计划;高等学校博士点基金(20040532005)资助

摘　　要：提出一种基于光子晶体光纤中脉冲俘获现象的超高速全光开关.信号脉冲处于正常色散区,它们彼此的时域间隔为1 ps.通过数值求解光子晶体光纤中脉冲传播满足的耦合非线性薛定谔方程,发现用孤子脉冲可俘获信号脉冲串中的任何一个脉冲,被俘获的信号脉冲的中心波长明显蓝移,在频域上和其他信号脉冲分离开来,于是让信号脉冲串在输出端通过布喇格光纤光栅,被俘获的信号脉冲将被过滤掉.数值模拟表明,用脉冲俘获实现的光开关响应速率可以达到1 THz.A theoretical investigation of the ultrafast all optical switching by using pulse trapping in photonic crystal fibers was presented. The characteristics of all optical switching were analyzed numerically based on the strict coupled nonlinear Schrodinger equation. Only an arbitrary single pulse among pulse train with temporal separation of about 1 ps was trapped by soliton pulse,the trapped pulse was blue-shifted and the optical spectra of trapped pulse was distinctly separated from those of the untrapped signal pulses. The trapped pulse can be easily picked off using a wavelength filter such as a fiber Bragg grating. All optical switching with 1 THz switching rate was demonstrated numerically.

关 键 词：全光开关 光子晶体光纤 脉冲俘获 光孤子 

分 类 号：TN929.11[电子电信—通信与信息系统]