OPTICAL MULTIPLEXER/DEMULTIPLEXER AND CHANNEL EQUALISER

摘要

This invention relates to a multiplexing device for separating or combining optical signals between at least one common optical waveguide and a number of second optical waveguides, as well as a related equaliser means. The optical signal comprises a number of signals having different wavelengths each constituting an optical channel, the multiplexing device comprising a first diffractive optical element, said diffractive element being wavelength dependent focal points so as to focus light between the common fiber and a chosen number of directions. The device also comprises a set of mirrors positioned in said directions, said mirrors being adapted to transmit light between the first diffractive element and (a set of) (the) second diffractive element(s), said second diffractive element(s) being adapted to focus light to or from the second optical waveguides.