Patent ID: 6823106
Filing Date: 2004-11-23
Classification: G02B

Abstract:
An optical multiplexer/demultiplexer, comprising:a first port; one or more second ports; a first diffraction grating for diffracting light from said first port; and a second diffraction grating for diffracting light diffracted by said first grating to direct the light to said one or more second ports, said second grating being disposed parallel with said first grating and having the same grating interval and grating direction as said first grating, said first and second diffraction gratings being placed to demultiplex a multi-wavelength light signal incident on said first port into separate light signals with different wavelengths, and each of said one or more second ports being placed to receive one of the separate light signals so that said multiplex/demultiplexer outputs at least one of the separate light signals through said one or more second ports.