Open AccessPropagation of ultra-short dark soliton pulses in an isotropic medium under the influence of third-order linear dispersion and nonlinearity dispersion
Author(s) -
B. Nenova,
D. Dakova,
Anelia Dakova,
V. Slavchev,
Lubomir M. Kovachev
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1859/1/012051
Subject(s) - dispersion (optics) , femtosecond , physics , soliton , isotropy , optics , pulse (music) , nonlinear system , picosecond , amplitude , supercontinuum , nonlinear optics , bandwidth limited pulse , modal dispersion , ultrashort pulse , self phase modulation , laser , optical fiber , dispersion shifted fiber , quantum mechanics , photonic crystal fiber , detector , fiber optic sensor
The nonlinear Schrödinger equation (NSE) is well-known and is one of the most commonly used in the field of nonlinear optics. Pulses with picosecond and femtosecond duration are very well described by the NSE, but it does not work for attosecond and phase-modulated femtosecond laser pulses, where the spectral width of the pulse is of the order of the carrying frequency. In such cases, it is more convenient to use the general nonlinear amplitude equation (NAE). During the propagation of ultra-short pulses in optical fibers, the effects of the third-order linear dispersion and dispersion of nonlinearity become significant and have to be taken into account. We expanded the NAE by including these two effects. In this paper, we present an analytical study on the influence of third-order linear dispersion and dispersion of nonlinearity on the evolution of ultra-short optical pulses and on the possibility of dark soliton formation under such conditions in a medium with normal dispersion.