In this paper, a new method of dark soliton transmission control by means of modulated Raman pump is presented.

The paper conclude some major factors which influence the dark soliton transmission system, such as initial phase, random dispersion, stochastic gain variation, intrapulse Raman scattering and time jitters in arrival.

The model of stochastic dispersion variation is built for a dark soliton transmission system, and its influence is studied on the arrival time jitters of the dark soliton to the detecting window.

The soliton transmission was achieved after the chirp of the optical pulse was eliminated, and the highorder soliton with pulse width of 13 ps was observed.

The results show that with the same initial condition,nonlinear optical pulse transmission in average normal fiber is superior to soliton transmission in short distance.

The interaction between two femtosecond optical solitons with soliton control is investigated, based on exact two-soliton solution to the generalized higher order nonlinear Schrdinger equation with variable coefficients directly.

In the optical soliton transmission systems using common single module optical fibers, the amplified spontaneous emission (ASE) noise and the overflow of dispersion waves are the two main factors that can cause energy and timing jitter of soliton, thus leading to some errors in bit rate of system.

【Abstract】 This paper intends to give a brief introduction of the main characters and key techniques of optical soliton transmission systems, and then proposes a practical design of this system.

Propagation characteristics of soliton couple in the nonlinear saturation medium are studied numerically.