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We experimentally demonstrate the transformation of 42.7-Gb/s optical differential-phase-shift-keyed signals into high-quality duobinary signals by optical filtering in an athermal delay-interferometer (DI) filter. The resulting duobinary signals have good back-to-back performance and show high tolerance to chromatic dispersion and concatenated optical filtering. The repetitive passbands of the DI...
Pulse-overlapped transmission employing RZ-DPSK is investigated. The nonlinear phase noise from Gordon-Mollenauer effect is reduced, while there exists another noise source resulting from intrachannel FWM. Simulations show superior 40-Gbit/s RZ-PDSK transmission over a NZDSF link
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