Solitons in long-haul communications systems

Summary form only given. A promising technology for long-haul optical fiber transmission is provided by soliton systems. Soliton transmission controlled by sliding frequency guiding filtering enables higher line bit-rates (10-20 Gbit/s), longer amplifier spans (i.e., 63 km), and substantially longer transmission distances (10-20 mm). The performance of such passively controlled soliton systems is limited by timing jitter (Gordon-Haus effect and interactions). Such a limit can be overcome by in-line optical regeneration, as based on synchronous modulation. In this paper the current state-of-the-art in transmission capacity, concerning both passive and active soliton systems, is described.