Femtosecond optical soliton transmission over long distances using adiabatic trapping and soliton standardization

A new technique for achieving subpicosecond–femtosecond optical soliton communication over long distances is proposed. The technique uses adiabatic soliton trapping and soliton standardization in an active transmission line with a finite optical-gain bandwidth. Forces destructive to femtosecond pulse propagation, such as soliton self-frequency shift and third-order dispersion, can be completely compensated for by the bandwidth-limited optical gain. Then soliton amplitude and width (i.e., area) are fixed to a certain value that indicates an N = 1 soliton, and the soliton is standardized by trapping. The technique will be a key technology for achieving ultrahigh-bit-rate (>100 Gbit/s) optical transmission systems.