Wave breaking in tapered holey fibers  

作　　者：李曙光 张磊 付博 郑义 韩颖 赵兴涛 

机构地区：[1]Key Laboratory of Metastable Materials Science and Technology,College of Science,Yanshan University [2]School of Science,Beijing Jiaotong University

出　　处：《Chinese Optics Letters》2011年第3期8-11,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.10874145);the Specialized Research Fund for the Doctoral Program of Higher Education (No.20091333110010);the Nature Science Foundation of Hebei Province (No.F2009000481);the China Postdoctoral Science Foundation (Nos.20080440014 and 200902046)

摘　　要：We numerically study the propagation of 1-ps laser pulse in three tapered holey fibers （THFs）.The curvature indices of the concave,linear,and convex tapers are 2.0,1.0,and 0.5,respectively.The central wavelength,located in the normal dispersion regime,is 800 nm.The nonlinear coefficient of the THFs increases from the initial 0.095 m-1· W-1 to the final 0.349 m-1·W-1.Wave breaking accompanied by oscillatory structures occurs near pulse edges,and sidelobes appear in the pulse spectrum.With the increase in propagation distance z,the pulse shape becomes broader and the pulse spectrum flattens.A concave THF is advantageous to the generation of wave breaking and enables easier achievement of super flat spectra at short lengths.We numerically study the propagation of 1-ps laser pulse in three tapered holey fibers （THFs）.The curvature indices of the concave,linear,and convex tapers are 2.0,1.0,and 0.5,respectively.The central wavelength,located in the normal dispersion regime,is 800 nm.The nonlinear coefficient of the THFs increases from the initial 0.095 m-1· W-1 to the final 0.349 m-1·W-1.Wave breaking accompanied by oscillatory structures occurs near pulse edges,and sidelobes appear in the pulse spectrum.With the increase in propagation distance z,the pulse shape becomes broader and the pulse spectrum flattens.A concave THF is advantageous to the generation of wave breaking and enables easier achievement of super flat spectra at short lengths.

关 键 词：BIREFRINGENCE Holey fibers 

分 类 号：TN253[电子电信—物理电子学]