摘要
Based on the transfer matrix method,a detailed theoretical and numerical study on double-phase-shifted fiber Bragg grating(FBG)is investigated.Temporal responses of the double-phase-shifted FBG to optical pulse are analyzed and the influence of the two phase-shifts’position on the reflected output pulse is evaluated.Results demonstrate that very different temporal pulse waveforms can be achieved by adjusting the length ratio(α=L2/L1).Specifically,a transform-limited Gaussian input optical pulse can be shaped into flat-top square pulse(α=1.81)or two identical optical pulse sequences(α=1.93).
基金
supported by the Foundation of Beijing Municipal Committee of CPC Organization Department(No.2012D005002000001)
the Talents of North China University of Technology(No.CCXZ201307)
the Importation and Development of High-Caliber Talents Project of Beijing Municipal Institutions(No.CIT&TCD201304001)
