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International Journal of Optics
Volume 2012, Article ID 573843, 14 pages
Review Article

Nonlinear Optical Signal Processing for Tbit/s Ethernet Applications

DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Building 343, 2800 Kongens Lyngby, Denmark

Received 31 May 2011; Accepted 12 July 2011

Academic Editor: Christophe Finot

Copyright © 2012 L. K. Oxenløwe et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We review recent experimental demonstrations of Tbaud optical signal processing. In particular, we describe a successful 1.28 Tbit/s serial data generation based on single polarization 1.28 Tbaud symbol rate pulses with binary data modulation (OOK) and subsequent all-optical demultiplexing. We also describe the first error-free 5.1 Tbit/s data generation and demodulation based on a single laser, where a 1.28 Tbaud symbol rate is used together with quaternary phase modulation (DQPSK) and polarization multiplexing. The 5.1 Tbit/s data signal is all-optically demultiplexed and demodulated by direct detection in a delay-interferometer-balanced detector-based receiver, yielding a BER less than 10−9. We also present subsystems making serial optical Tbit/s systems compatible with standard Ethernet data for data centre applications and present Tbit/s results using, for instance silicon nanowires.