Abstract

An important issue concerning the generation and propagation of short intense soliton pulses in active monomode optical glass fibres and fibre lasers,^[1-4] is stability. For picosecond soliton propagation in fibre lasers, exceptional stability to noise, periodical loss and gain can be realised. With the generation of subpicosecond solitons, however, other physical processes arise. Prominent are the soliton Raman self-frequency shift process, and the fact that real fibre amplifiers have limited bandwidths. However, theoretical^[5] and experimental^[6] work has shown the frequency shift due to Raman self-action can be suppressed with the aid of bandwidth limited amplification. Consequently stable soliton propagation is still possible under the combined effects of bandwidth limited amplification, loss and self frequency shift.

© 1992 IQEC