Patent ID: 6321001
Filing Date: 2001-11-20
Classification: G02B

Abstract:
A wavelength division multiplexed optical communication system comprising:an optical waveguide having a plurality of transmission grating means, each defining a node, a first of said plurality of transmission grating means disposed at a first node and being responsive to couple impinging light at a plurality of preselected wavelengths into said waveguide and operative to propagate the coupled light through the waveguide, and a second transmission grating means responsive to the propagating light and operative to emit a portion of it in directions corresponding to each of said preselected wavelengths;a plurality of optical sources disposed proximate said first node, each source transmitting an optical signal at a preselected wavelength that differs from the emitted by the other sources, said plurality of sources arranged to transmit said optical signals to said first grating means; anda plurality of optical detectors disposed proximate said second node, each detector positioned in a direction to receive emitted light having detect a preselected wavelength that corresponds to a transmitted preselected wavelength.