Optimized dispersion compensation scheme for long-distance transmission in nonlinear fibers

摘要

This paper describes a new scheme for dispersion compensation called nonlinearity tolerant dispersion compensation scheme (NTDCS). The scheme is characterized by a short piece of dispersion compensating fiber (DCF) in front of the transmission fiber and a second DCF after it compensating for the rest of SSMF dispersion. The NTDCS shows much better eye restoration than precompensation or postcompensation. It is characterized by a shift of a postcompensated dispersion map towards smaller values. A shift of $MIN@280 ps/nm is found to be best choice. The tolerance against SPM is demonstrated by simulations with varying channel powers. Up to 10.5 dBm amplifier output power can easily be tolerated for a 8 $MUL 80 km transmission.