Abstract

Temporal dark optical solitons are stable odd solutions of the Nonlinear Schroedinger Equation describing the propagation, of a spatially single-mode plane wave in presence of normal (or positive) Group Velocity Dispersion (GVD) and Self-induced Phase Modulation (SPM). Such propagation of temporal dark signal in single-mode optical fibers has, after some pioneering experimental demonstrations in the visible region of the spectrum, received much attentions¹. Simulations predicting the possibility of optically amplifying dark solitons², on one hand, and establishing their stability with respect to the Gordon-Haus jitter effect in ultralong amplified systems³, on the other hand, opened the telecommunication domain as a potential field of applications for negative pulses. Recently, single dark pulse propagation experiments, with telecommunication compatible parameters (picosecond duration, infrared wavelength and 1km fiber), were reported⁴. In this paper, as a first step to a study of soliton sequences, we present experimental observations of the propagation of truncated dark pulse pairs.

© 1992 The Author(s)