Open AccessExperimental study and numerical analysis of femtosecond pulse propagation and supercontinuum generation in highly nonlinear photonic crystal fiber
Author(s) -
Jian Ya-Qing,
Peiguang Yan,
Lyu Ke-Cheng,
Tiequn Zhang,
Xing Zhu
Publication year - 2006
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.55.1809
Subject(s) - supercontinuum , femtosecond , zero dispersion wavelength , optics , dispersion (optics) , photonic crystal fiber , wavelength , four wave mixing , self phase modulation , materials science , doppler broadening , laser , cross phase modulation , physics , nonlinear photonic crystal , nonlinear optics , dispersion shifted fiber , optical fiber , phase modulation , spectral line , fiber optic sensor , astronomy , phase noise
Femtosecond laser pulse propagation and supercontinuum generation in a highly nonlinear photonic crystal fiber is investigated experimentally and numerically. Consistent results of continuum generation measured and calculated for 790, 800, and 820 nm pump wavelengths are presented. It is shown that when the pump wavelength overlaps with the zero-dispersion wavelength self-phase modulation and third-order dispersion play an important role, and the oscillation structure appears in the temporal waveform of the propagating pulses, whereas in anomalous dispersion region, the formation and the red-shift of solitons are evident, and the self phase modulation plays a dominant role only in the initial stage. Further spectral broadening is due to solitons self-frequency shift, fission of higher-order solitons and four-wave mixing. It is also found that four-wave mixing occurs more easily in anomalous dispersion region than at the zero-dispersion wavelength.