title: Demultiplexing of OTDM-DPSK signals based on a single semiconductor optical amplifier and optical filtering.
abstract: We propose and demonstrate the use of a single semiconductor optical amplifier (SOA) and optical filtering to time demultiplex tributaries from an optical time division multiplexing-differential phase shift keying (OTDM-DPSK) signal. The scheme takes advantage of the fact that phase variations added to the target channel by cross-phase modulation from the control signal are effectively subtracted in the differential demodulation scheme employed for DPSK signals. Demultiplexing from 80 to 40 Gbit/s is demonstrated with moderate power penalty using an SOA with recovery time twice as long as the bit period at 80 Gbit/s. Large dynamic ranges for the input power and SOA current are experimentally demonstrated. The scheme is expected to be scalable toward higher bit rates.
authors.affiliation: DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark. jinxu@fotonik.dtu.dk
authors.forename: Jing
authors.initials: J
authors.lastname: Xu
authors.forename: Yunhong
authors.initials: Y
authors.lastname: Ding
authors.forename: Christophe
authors.initials: C
authors.lastname: Peucheret
authors.forename: Jorge
authors.initials: J
authors.lastname: Seoane
authors.forename: Hans Christian Hansen
authors.initials: HC
authors.lastname: Mulvad
authors.forename: Michael
authors.initials: M
authors.lastname: Galili
authors.forename: Weiqi
authors.initials: W
authors.lastname: Xue
authors.forename: Jesper
authors.initials: J
authors.lastname: Mørk
authors.forename: Palle
authors.initials: P
authors.lastname: Jeppesen