Abstract

We demonstrate that the transmission of $40\mathrm{Gbits}∕\mathrm{s}$ return-to-zero differential phase-shift keying (RZ-DPSK) signals is robust to lumped dispersion mapping on a typical installed terrestrial single-mode fiber/dispersion compensating fiber (SMF–DCF) link and will withstand, in this case, propagation through over $800\mathrm{km}$ of SMF with zero in-line group-velocity dispersion compensation while maintaining similar performance to configurations with periodic mapping. We establish that upgrading similar point-to-point links, which have lumped dispersion maps, are compatible with $40\mathrm{Gbits}∕\mathrm{s}$ RZ-DPSK and that economic benefits can be realized when implementing lumped dispersion mapping in new $40\mathrm{Gbits}∕\mathrm{s}$ RZ-DPSK terrestrial links, while incurring a relatively low performance penalty.

© 2008 Optical Society of America

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