Phase jitter of chirped subpicosecond solitons in a noisy optical fiber channel: Exact moment method description

¹  Department of Physics, Southeast University - Nanjing 210096, China
²  Wuhan National Laboratory for Optoelectronics - Wuhan 430074, China
³  Department of Physics, Huazhong University of Science and Technology - Wuhan 430074, China

Corresponding author: cshua@seu.edu.cn

Received: 19 May 2007
Accepted: 5 September 2007

Abstract

The phase statistics of chirped subpicosecond solitons in an optical fiber channel with varying dispersion and nonlinearity is described using the moment method. Both the multiplicative and additive noises that result, respectively, from the spontaneous Raman scattering and the amplified spontaneous emission are rigorously included for exploration. By taking into account the effect of chirp fluctuations, an algebraically closed expression for the variance of phase jitter is obtained. It is clearly shown that both the dispersive and chirp fluctuations effects are essential for correctly understanding such phase statistics as well as the Gordon-Mollenauer effect. In terms of this expression, the intriguing subtleties of the interplay between these effects are analyzed and a good agreement between analytical predictions and numerical simulations is obtained.