title: Phase-transparent optical data exchange of 40 Gbit/s differential phase-shift keying signals.
abstract: We report the phase-transparent optical data exchange of differential phase-shift keying (DPSK) signals by exploiting the parametric depletion of nondegenerate four-wave mixing (FWM) in a highly nonlinear fiber. Theoretical analyses of nondegenerate FWM involving two signals and two pumps are presented. Analytical solutions are derived, indicating the exchange condition and the feasibility of phase-transparent data exchange. Optical data exchange between 10.7 Gbit/s non-return-to-zero DPSK (NRZ-DPSK) and return-to-zero DPSK signals is implemented with a power penalty of approximately 1.5 dB at a bit-error rate (BER) of 10(-9). Moreover, we demonstrate phase-transparent optical data exchange between two 40 Gbit/s NRZ-DPSK signals with a power penalty of approximately 4.5 dB at a BER of 10(-9).
authors.affiliation: Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, USA. wang41@usc.edu
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
authors.forename: Zahra
authors.initials: Z
authors.lastname: Bakhtiari
authors.forename: Scott R
authors.initials: SR
authors.lastname: Nuccio
authors.forename: Omer F
authors.initials: OF
authors.lastname: Yilmaz
authors.forename: Xiaoxia
authors.initials: X
authors.lastname: Wu
authors.forename: Alan E
authors.initials: AE
authors.lastname: Willner