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Appl Opt. 2013 Mar 20;52(9):1919-27. doi: 10.1364/AO.52.001919.

Automatic DGD and GVD compensation at 640 Gb/s based on scalar radio-frequency spectrum measurement.

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1
Centre for Ultrahigh bandwidth Devices for Optical Systems, Institute of Photonics and Optical Science, School of Physics, University of Sydney, New South Wales, Australia. yvan@physics.usyd.edu.au

Abstract

We demonstrate what we believe to be the first real-time impairment-cancellation system for group-velocity dispersion (GVD) and differential group delay (DGD) for a 640 Gb/s single-channel signal. Simultaneous compensation of two independent parameters is demonstrated by feedback control of separate GVD and DGD compensators using an impairment monitor based on an integrated all-optical radio-frequency (RF) spectrum analyzer. We show that low-bandwidth measurement of only a single tone in the RF spectrum is sufficient for automatic compensation for multiple degrees of freedom using a multivariate optimization scheme.

PMID:
23518737
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