Patent ID: 6201909
Filing Date: 2001-03-13
Classification: G02B,G02F,H04J

Abstract:
A system for switching of individual optical wavelength bands in a multi-wavelength optical transmission system comprising:a plurality of non-evanescent wavelength selective optical couplers each having two pairs of terminals coupled to a common reduced diameter waist region including a periodic grating which diverts with low insertion loss signals of selected wavelengths received at one terminal of a pair to the other terminal of the pair, while passing through signals of other than the selected wavelengths, thereby both bandpass filtering and redirecting signals, andcircuit connections including a multi-wavelength line coupled to all the couplers at selected terminals of the couplers, the couplers being arrayed in a selected pattern of wavelength selectivity to selectively redistribute the selected wavelength signals in a chosen manner.