Mach-zehnder based filter demultiplexers and method
AssigneeTellamon Photonic Networks Inc.
InventorsNima Ahmadvand, Hamid Hatami-Hanza
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Abstract
WDM demultiplexers are provided utilizing, for example, cascaded asymmetric MZI filters, wherein the (asymmetric) differential delay is such that at the output of the first stage MZI demultiplexes the WDM channels in groups of two at its output. The result is a relaxed specification for the frequency response of the filters.
Claims6
A method for demultiplexing WDM optical channel signals, characterized by separating WDM channels in groups of two channels each prior to further demultiplexing.
A demultiplexer of demultiplexing WDM optical channel signals, comprising a plurality of cascaded wavelength filters, wherein a first stage of the cascaded filters separates the WDM optical channel signals in groups of two channels each at its output.
Dependencies are inferred from the claim text.