Patent ID: 6563976
Filing Date: 2003-05-13
Classification: G02B

Abstract:
An apparatus, comprising:a first substrate comprising means for providing light to and/or receiving light from said apparatus; a second substrate comprising a plurality of diffractive input lenses, and an output diffractive lens, operatively connected thereto; wherein said input lenses are designed to be identical with respect to period and modulation depth and wherein said output lens comprises a period and modulation depth selected to be the opposite of the period and modulation depth of said input lenses, wherein chromatic angular shift will be substantially canceled by said output lens; and a third substrate comprising at least one filter operatively connected thereto, wherein said third substrate further comprises means for reflecting said light, wherein said first substrate and said second substrate and said third substrate are fixedly and operatively connected such that said apparatus operates to provide an optical wavelength multiplexer and/or demultiplexer.