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. © 2005 Optical Society of America.
Bibliographical note© 2005 Optical Society of America
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- high-bit-rate dispersion-managed fiber systems
- hybrid amplification
- asymptotically vanishing length
- nontrivial optimal span length
- 40-Gbit/s wavelength
- Raman-erbium-doped fiber amplification