Abstract

Parametric amplification in a single-mode silica fiber is studied by means of temporal cross-phase modulation between a strong picosecond pump and a weak signal pulse. The theoretical study deals with the nonlinear Schrödinger equation (NLSE), well-known to describe pulse propagation along single-mode fibers under the combined influences of optical Kerr effect, group-velocity dispersion (GVD) and, eventually, birefringence. In the present work, the time-varying input field results from two superimposed pulses whose spectral decays, relative intensities, and temporal shapes can be varied. The parametric gain is then calculated by means of Fourier transform of the beating pulse at the end of the fiber. Different cases are studied in the normal dispersion regime of the fiber.

© 1994 IEEE