Automatic DGD and GVD compensation at 640 Gb/s based on scalar radio-frequency spectrum measurement
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Authors
Paquot, Yvan
Schröder, Jochen
Palushani, Evarist
Neo, Richard
Oxenløwe, Leif K
Madden, Steve
Luther-Davies, Barry
Pelusi, Mark D
Eggleton, Benjamin J
Choi, Duk-Yong
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Optical Society of America
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.
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Applied optics