Abstract

Transmission performance of six modulation formats is numerically compared in 40*40-Gb/s wavelength division multiplexing (WDM) repeaterless systems. The results indicate that return-to-zero differential phase shift keying (RZ-DPSK) (33% duty cycle) demonstrates the best performance among all the formats when the accumulated amplified spontaneous emission power (AASEP) is small. But with the increasing of AASEP, the superiority of RZ-DPSK transmission performance over the other five modulation formats is vanished. AASEP is justified to be the major source for the deterioration of the superiority.

© 2005 Chinese Optics Letters

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Other

L. Labrunie, V. Faraci, P. Bousselet, V. Karpov, S. Papemyi, V. Protopopov, V. Faraci, N. Tranvouoz, and G. Sautereau-Martin, in Proceedings of ECOC'05 1171 (2005).

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