This paper presents the first field trial using the return-to-zero differential-phase-shift-keying (RZ-DPSK) modulation format. A 96 x 10-Gb/s RZ-DPSK field trial was conducted over a 13100-km optical undersea path by double passing the installed 6550-km underwater link which was deployed with non-slope-matched submarine fibers. All channels performed with more than a 3-dB forward-error correction margin, including channels that accumulated over ±13 000 ps/nm of dispersion. It is also shown that the RZ-DPSK format has similar residual dispersion and channel power tolerance for both slope-matched and non-slope-matched fibers. Furthermore, it is demonstrated that the chirped RZ-DPSK format could further improve system performance by 1-2 dB.
© 2005 IEEE
J.-X. Cai, D. G. Foursa, L. Liu, C. R. Davidson, Y. Cai, W. W. Patterson, A. J. Lucero, B. Bakhshi, G. Mohs, P. C. Corbett, V. Gupta, W. Anderson, M. Vaa, G. Domagala, M. Mazurczyk, H. Li, S. Jiang, M. Nissov, A. N. Pilipetskii, and Neal S. Bergano, "RZ-DPSK Field Trial Over 13100 km of Installed Non-Slope-Matched Submarine Fibers," J. Lightwave Technol. 23, 95- (2005)