This paper demonstrates a multichannel wavelength conversion of differential phase-shift-keyed (DPSK) signals using four-wave mixing in a highly nonlinear fiber. The wavelengths of three 10-Gb/s nonreturn-to-zero (NRZ) DPSK channels are simultaneously converted without incurring the cross-gain modulation penalty usually associated with on–off-keyed signals. A maximum conversion efficiency of 85% was achieved for both NRZ and return-to-zero DPSK signals.
© 2006 IEEE
Preetpaul Devgan, Renyong Tang, Vladimir S. Grigoryan, and Prem Kumar, "Highly Efficient Multichannel Wavelength Conversion of DPSK Signals," J. Lightwave Technol. 24, 3677-3682 (2006)