title: [Nonlinear chirp effect in a dispersion-slowly decreasing fiber].
abstract: Because the transmission of solition in optical fiber is affected by manifold factors such as chirping effect etc., the pulse width of soliton, and the light impulse becomes undetectable at terminal, which has a strong impact on error code rate. Therefore, it is important to study the effect of different factors on the pulse width of soliton. In this paper the nonlinear Schrödinger(NLS) equation containing nonlinear chirp effect in a dispersion-slowly decreasing optical fiber was solved, and the influence of the nonlinear chirp effect on the pulse width of soliton was discussed. It is showed that the effect of slowly decreasing dispersion equals to the gain of a long distance dispersed parameter of fiber amplifier, which leads to the increase of nonlinear effect, and the soliton is more compressed. Nonlinear chirp effect causes the soliton pulse width compressed when the value of x is small and causes its pulse width broadened when the value of x is large.
authors.affiliation: Photoelectricity Central Laboratory of Jiangsu Province, Nanjing Normal University, Nanjing 210097, China.
authors.forename: Ting-gen
authors.initials: TG
authors.lastname: Shen
authors.forename: Xi-lin
authors.initials: XL
authors.lastname: Tan