Patent ID: 6288810
Filing Date: 2001-09-11
Classification: H04J

Abstract:
Device for adding and dropping optical signals to and from an optical transmission path (8), comprising:an input (950) for a plurality of optical signals with distinct wavelengths;spectral selection means (951, 959) for sending at least a first of said signals to a first optical path and sending at least a second of said signals to a second optical path;a wavelength selective switching means (953; 963) along said first optical path, for adding and dropping at least an optical signal to and from said first optical path;means (961, 969) for combining optical signals form said first and said second path to an output (960),characterized in that said spectral selection means comprises:means (959) for dividing said plurality of optical signals in a first and a second series of optical signals, mutually staggered in wavelength, andmeans (951, 959) for sending said first series of optical signals to said first optical path and said second series of optical signals to said second optical path.