16 DWDM channels optoelectronic 3R NRZ-to-RZ regenerative formatconversions based on single Phase Modulator

摘要

We propose and demonstrate simultaneous multiple dense wavelength division multiplexing (DWDM) channelsoptoelectronic non-return-to-zero (NRZ) to return-to-zero (RZ) regenerative format conversions based on a single phasemodulator (PM) and a fibre delay-interferometer (DI). The PM is driven by a local RF clock signal, and the DI with freespectral range (FSR) equals to the channel spacing is used to extract the chirps induced by the phase modulation, for allthe channels at the same time. Since the original carriers are suppressed to some extent while the chirps are extracted,thus the NRZ-to-RZ conversions can be achieved with regeneration. The proposed multi-channels format conversions aresuccessfully demonstrated at 16~*10 Gb/s, with channel spacing of 100GHz. Bit error ratio (BER) measurements show3.5 and 4.2 dB penalty improvements for 50 and 75 km transmission without dispersion compensation, respectively.