XU Yong-zhao, LIU Min-xia, ZHANG Geng etc. Nonlinear Chirped-pulse Propagation and Supercontinuum Generation in Dispersion-flattened Dispersion-decreasing Fibers[J]. Chinese Journal of Luminescence, 2016,37(4): 439-445
XU Yong-zhao, LIU Min-xia, ZHANG Geng etc. Nonlinear Chirped-pulse Propagation and Supercontinuum Generation in Dispersion-flattened Dispersion-decreasing Fibers[J]. Chinese Journal of Luminescence, 2016,37(4): 439-445 DOI: 10.3788/fgxb20163704.0439.
Nonlinear Chirped-pulse Propagation and Supercontinuum Generation in Dispersion-flattened Dispersion-decreasing Fibers
Based on the generalized nonlinear Schrdinger equation
nonlinear chirped-pulse propagation and supercontinuan (SC) generation in dispersion-flattened dispersion-decreasing fibers (DFDFs) were investigated numerically. The simulation results indicate that the effect of initial chirp parameter on pulse propagation and SC generation is highly related to the choices of pumping conditions and fiber parameters. When DFDF has small normalized quadratic dispersion coefficient
proper positive chirps can significantly enhance the SC bandwidth
while negative chirps or too large positive chirps suppresses the SC bandwidth. There is a wide range of positive chirps that can enhance the SC bandwidth
but the range of proper positive chirps become narrower as input soliton order decreases; When DFDF has large normalized quadratic dispersion coefficient and the pump pulse is a lower-order soliton
the enhancement of SC bandwidth by initial chirp parameter is insignificant
and the widest SC spectrum is generated when the initial chirp is close to zero.
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references
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