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Optical transport networks will soon require channel data rates in excess of 100 Gb/s in order to continue to meet the demand for bandwidth. Bandwidth flexible optical networks, based on flex-grid ROADMs, have been proposed in the literature to support 400 Gb/s and 1 Tb/s super channels [1]. In such systems, techniques including coherent optical OFDM and Nyquist WDM transmission [2] may be employed...
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