Ultra-short pulse propagation in single mode optical fiber

The propagation of short pulses in single mode optical fibers is affected by a number of linear and nonlinear effects. The influence of different effects on pulse propagation depends on the pulse power and width and the fiber properties. Picosecond pulse propagation at wavelengths far from the dispersion minimum is described by the effects of the group velocity dispersion and the refractive-index nonlinearity. Stable pulse-propagation without changes of pulse spectral and temporal shapes can exist as a result of the cancellation of the effect of pulse broadening through dispersion by the refractive index nonlinearity. Solitary waves pass through one another without deformations due to the collisions. The optical soliton in fibers is the solitary wave of an envelope of a light wave. The optical soliton belongs to an envelope soliton. The pulse shape represents an envelope of a light wave. An envelope of a wave which propagates in a strongly dispersive nonlinear medium,in which the wave property depends on the amplitude as well as on the wavelength of the wave, has a solitary wave solution had been known for waves in plasmas. In our simulation we will investigate pulse propagation in single- mode optical fibers. We will analyze the influence of different effects on pulse propagation. In this analysis, we will use nonlinear schrodinger equation which describes soliton wave and split-step fourier method to solve this equation. These effects depend on the pulse power and width and also linear and nonlinear fiber properties. Keywords : Ultra-short pulse propagation, single mode optical fiber, refractive index, soliton, nonlinear schrodinger equation, split-step fourier method.