title: Novel real-time homodyne coherent receiver using a feed-forward based carrier extraction scheme for phase modulated signals.
abstract: We report a novel real-time homodyne coherent receiver based on a DPSK optical-electrical-optical (OEO) regenerator used to extract a carrier from carrier-less phase modulated signals based on feed-forward based modulation stripping. The performance of this non-DSP based coherent receiver was evaluated for 10.66 Gbit/s BPSK signals. Self-homodyne coherent detection and homodyne detection with an injection-locked local oscillator laser was demonstrated. The performance was evaluated by measuring the electrical signal-to-noise (SNR) and recording the eye diagrams. Using injection-locking for the LO improves the performance and enables homodyne detection with optical injection-locking to operate with carrier-less BPSK signals without the need for polarization multiplexed pilot-tones.
authors.affiliation: Department of Physics and Tyndall National Institute, University College Cork, Ireland. selwan.ibrahim@tyndall.ie
authors.forename: Selwan K
authors.initials: SK
authors.lastname: Ibrahim
authors.forename: Stylianos
authors.initials: S
authors.lastname: Sygletos
authors.forename: Ruwan
authors.initials: R
authors.lastname: Weerasuriya
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Ellis
mesh_terms: D003199:Computer Systems; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D055096:Optical Devices; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*