Open AccessModulation instability of fiber Bragg gratings with Gaussian apodization
Author(s) -
Weijuan Jia,
Shi Pei-Ming,
Xingyu Yang,
Junping Zhang,
Fan Guo-liang
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.5281
Subject(s) - apodization , instability , optics , fiber bragg grating , physics , dispersion (optics) , modulation (music) , chirp , gaussian , self phase modulation , materials science , optical fiber , nonlinear optics , laser , mechanics , quantum mechanics , acoustics
The coherently coupled nonlinear Schrdinger (NLS) equation of the propagation of light pulse in fiber Bragg gratings has been utilized to study the modulation instability of laser pluses in fiber Bragg gratings with Gaussian apodization function, not only in the anomalous dispersion regime, but also in the normal dispersion regime. The results show that modulation instability can occur in both regimes. The regular gain spectra are observed obviously when input power reaches a definite value in the anomalous dispersion regime. The modulation instability can increase from a fixed value to infinity when the input power is in the region of modulation instability in normal dispersion regime. Furthermore, the gain spectra are restrained by Gaussian apodization function in both regimes.