Four-bit all-optical quantization based on Raman self-fre-quency shift and spectral compression  

作　　者：梁锐 周晓军 张旨遥 李和平 刘永智 刘永 

机构地区：[1]School of Optoelectronic Information,University of Electronic Science and Technology of China [2]Key Laboratory of Broadband Optical Fiber Transmission and Communication Networks,Ministry of Education,University of Electronic Science and Technology of China

出　　处：《Optoelectronics Letters》2009年第6期437-440,共4页光电子快报（英文版）

基　　金：supported by the National High Technology Research and Development Program of China (No.2007AA01Z269);the National Natural Science Foundation of China (No.60736038)

摘　　要：An all-optical quantization based on Raman self-frequency shift(RSFS) in a photonic crystal fiber(PCF) and spectral compression in a dispersion-increasing fiber(DIF) is analyzed,and the evolution of femtosecond pulse in fibers is described by numerically solving the generalized nonlinear Schrdinge equation(GNLSE).Gaussian pulse with the width of 300 fs and center wavelength of 1550 nm is injected into 15 m-long PCF and 100 m-long DIF.The simulation results show that the center wavelength increases linearly with the input peak power which changes from 110 W to 165 W.The RSFS of 65.3 nm and maximal spectral compression ratio of 3.38 can be obtained.The resolution of the quantization is improved from 2.4 bits to 4 bits by using the spectral compression in the DIF.An all-optical quantization based on Raman self-frequency shift（RSFS） in a photonic crystal fiber（PCF） and spectral compression in a dispersion-increasing fiber（DIF） is analyzed,and the evolution of femtosecond pulse in fibers is described by numerically solving the generalized nonlinear Schrdinge equation（GNLSE）.Gaussian pulse with the width of 300 fs and center wavelength of 1550 nm is injected into 15 m-long PCF and 100 m-long DIF.The simulation results show that the center wavelength increases linearly with the input peak power which changes from 110 W to 165 W.The RSFS of 65.3 nm and maximal spectral compression ratio of 3.38 can be obtained.The resolution of the quantization is improved from 2.4 bits to 4 bits by using the spectral compression in the DIF.

关 键 词：拉曼自频移 频谱压缩 量化 全光 光子晶体光纤 广义非线性 频率 昼夜温差 

分 类 号：TP335[自动化与计算机技术—计算机系统结构]