Open AccessThe theoretical study and numerical simulation of self-similar transmission of high energy wave-breaking free ultra-short pulse
Author(s) -
Ting Lei,
Chenghou Tu,
Enbang Li,
Yongnan Li,
Weichun Guo,
Wen Dai,
Heyuan Zhu,
Lyu Fu-Yun
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.56.2769
Subject(s) - pulse (music) , breaking wave , transmission (telecommunications) , energy (signal processing) , high energy , physics , optics , computer science , wave propagation , telecommunications , atomic physics , quantum mechanics , detector
The approximation of the phase introduced by self-phase modulation (SPM) is reasonably calculated and the spectrum broadening factor is given basing on nonlinear Schrdinger equation. The spectrum of propagating pulses is broadened seriously by SPM in the fiber with normal group velocity dispersion (GVD) when gain (G) exists. And the spectra broadening of the central part of pulses is quite different from that of the wings of the pulses. The self-similar evolution of Gaussian pulses is described. The temporal shape of the wings of the pulses being covered by the central part gradually is discovered. A theoretical explanation of self-similar pulses propagation is given which verified by the numerical simulation for the self-similar evolution of three kinds of pulses.