Researchers of the CESNET Association in the area of optical technologies have developed a design that is now patent-protected. The United States Patent and Trademark Office on 16 May registered patent document No. 9,654,215 – Spectrally flexible device for bi-directional transmissions of optical signals sensitive to timing. The CzechLight family of devices, to which this solution belongs, enables long-distance transmission of highly accurate and stable optical signals over hundreds or thousands of kilometres and, notably, makes use of spectral bands that are not currently in use in telecommunications fibres.
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