Patent ID: 6067178
Filing Date: 2000-05-23
Classification: G02B,H04J

Abstract:
A wavelength division multiplexer for separating an optical signal into a plurality of components comprising:a filter for isolating one component of the plurality of components, the one component of the plurality of components being a component separating the first plurality of components from the second plurality of components;a splitter for separating a portion of the optical signal into a plurality of groups, the splitter including a splitter input coupled to the filter, the portion of the optical signal remaining after the one component is isolated, each group containing a portion of the plurality of components, the plurality of groups including a first group and a second group, the first group including a first plurality of components, the second group containing a second plurality of components, the plurality of components of the optical signal including the first plurality of components and the second plurality of components, the one component separating the first plurality of components and the second plurality of components; anda plurality of isolators coupled to the splitter, the plurality of isolators corresponding to the plurality of groups, each of the plurality of isolators for isolating each component of the corresponding group, the plurality of isolators including a first isolator and a second isolator, the first isolator including a first plurality of filter corresponding to the first group, each filter of the first plurality of filters for isolating a component the first plurality of components, the first plurality of filters being coupled to be cascaded in series, the second isolator including a second plurality of filters corresponding to the second group, each filter of the second plurality of filters for isolating a particular component of the second plurality of components, the second plurality of filters being coupled to be cascaded in series.