Lightpath (optical network)Look up lightpath in Wiktionary, the free dictionary. In optical networking, a lightpath is a path between two nodes in an optical network between which light passes through unmodified. DescriptionWhen a lightpath can be established between source and destination node endpoints the connection is totally optical and avoids throttling by intermediate electronic conversions and processing.[1] Where a lightpath passes through an Optical add-drop multiplexer (OADM) is known as a cut-through lightpath. Where a lightpath is added or dropped at an OADM, it is known as an added/dropped lightpath.[2] Semi-lightpathWhere endpoints are connected by a series of lightpaths with the intermediate nodes only changing the light wavelength at the junctions this may be referred to as a semi-lightpath.[3] See also
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