Cyclic spectra for wavelength-routed optical networks
classification
💻 cs.NI
keywords
multiplexingsignalsystemstolerancebandschannelclosely-spacedcommercial
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We propose occupying guard-bands in closely-spaced WDM systems with redundant signal spectral components, to increase tolerance to frequency misalignment and channel shaping from multiplexing elements. By cyclically repeating the spectrum of a modulated signal, we show improved tolerance to impairments due to add/drop multiplexing with a commercial wavelength selective switch, in systems using 5-20% guard bands on a 50-GHz DWDM grid.
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