RZ-DPSK field trial over 13,100 km of installed non slope-matched submarine fibers

We successfully conducted a 96/spl times/10 Gb/s RZ-DPSK field trial over an installed 13,100 km optical undersea path with more than 3 dB FEC margin, including channels with >13,000 ps/nm dispersion. The performance was further improved 1-2 dB by adding prechirp.