Open AccessSimultaneous all-optical demodulation and format conversion for multi-channel (CS)RZ-DPSK signals
Author(s) -
Zheng Zhang,
Yu Yu,
Chi Zhang
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.012427
Subject(s) - demodulation , optics , keying , phase shift keying , channel (broadcasting) , differential phase , physics , signal (programming language) , modulation (music) , phase (matter) , computer science , bit error rate , telecommunications , acoustics , programming language , quantum mechanics
We proposed and demonstrate an all-optical demodulation and format conversion scheme for multi-channel (carrier suppressed) return-to-zero differential phase shift keying ((CS)RZ-DPSK) signals. By utilizing a single delay interferometer (DI) with half bit delay, multi-channel (CS)RZ-DPSK signals can be demodulated simultaneously at the destructive port of the DI, with the corresponding converted nonreturn-to-zero differential phase shift keying (NRZ-DPSK) signals obtained at the constructive port. The proposed multi-channel operation has been demonstrated for 6*20 Gb/s RZ-DPSK and 6*40 Gb/s CSRZ-DPSK signals, with ~0.8 and 1.2 dB average power penalties for the format conversions respectively.