title: Optimal span length in high-speed transmission systems with hybrid Raman-erbium-doped fiber amplification.
abstract: We show, using nonlinearity management, that the optimal performance in high-bit-rate dispersion-managed fiber systems with hybrid amplification is achieved for a specific amplifier spacing that is different from the asymptotically vanishing length corresponding to ideally distributed amplification [Opt. Lett. 15, 1064 (1990)]. In particular, we prove the existence of a nontrivial optimal span length for 40-Gbit/s wavelength-division transmission systems with Raman-erbium-doped fiber amplification. Optimal amplifier lengths are obtained for several dispersion maps based on commonly used transmission fibers.
authors.affiliation: School of Engineering and Applied Science, Aston University, Birmingham B4 7ET, UK. aniacajd@aston.ac.uk
authors.forename: Juan Diego
authors.initials: JD
authors.lastname: Ania-Castañón
authors.forename: Irina O
authors.initials: IO
authors.lastname: Nasieva
authors.forename: Sergei K
authors.initials: SK
authors.lastname: Turitsyn
authors.forename: Nicolas
authors.initials: N
authors.lastname: Brochier
authors.forename: Erwan
authors.initials: E
authors.lastname: Pincemin