Patent ID: 6215926
Filing Date: 2001-04-10
Classification: G02B,H04J

Abstract:
A dense wavelength division multiplexer for separating an optical signal into optical channels comprising:means for inputting an optical signal, the optical signal comprising a plurality of optical channels, wherein each channel is an individual information-carrying light of a particular wavelength range;means for splitting the optical signal into a first portion and a second portion, wherein the splitting means comprises a reflective coating between a plurality of glass blocks with differing indices of refraction, wherein the reflective coating is polarization insensitive;means for separating a first channel and a second channel of the first and second portions by introducing a phase difference between the first and second channels, wherein the separating means comprises the plurality of glass blocks optically coupled to a nonlinear interferometer; andmeans for outputting the first channel along a first optical path and the second channel along a second optical path.