Phase-transparent optical data exchange of 40 Gbit/s differential phase-shift keying signals.
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).
Wang
Jian
J
Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, USA. wang41@usc.edu
Bakhtiari
Zahra
Z
Nuccio
Scott R
SR
Yilmaz
Omer F
OF
Wu
Xiaoxia
X
Willner
Alan E
AE