title: Spectrally efficient slow light using multilevel phase-modulated formats.
abstract: A phase-preserving and spectrally efficient slow-light scheme has been proposed and demonstrated by utilizing advanced multilevel phase-modulated formats. A 60 ps symbol delay with error-free demodulation of both I and Q channels for 10 Gbit/s return-to-zero differential-quadrature-phase-shift-keyed (DQPSK) signals via a broadband stimulated Brillouin scattering-based slow-light medium is achieved experimentally. Simulation results on 20 Gbit/s DQPSK and 30 Gbit/s D8PSK propose to transmit very high spectrally efficient multilevel formats through a bandwidth-limited slow-light element.
authors.affiliation: Department of Electrical Engineering-Systems, University of Southern California, 3740 McClintock Avenue EEB 500, Los Angeles, California 90089, USA. boz@usc.edu
authors.forename: Bo
authors.initials: B
authors.lastname: Zhang
authors.forename: Lianshan
authors.initials: L
authors.lastname: Yan
authors.forename: Lin
authors.initials: L
authors.lastname: Zhang
authors.forename: Scott
authors.initials: S
authors.lastname: Nuccio
authors.forename: Louis
authors.initials: L
authors.lastname: Christen
authors.forename: Teng
authors.initials: T
authors.lastname: Wu
authors.forename: Alan E
authors.initials: AE
authors.lastname: Willner