Patent ID: 6556749
Filing Date: 2003-04-29
Classification: G02B

Abstract:
An array waveguide grating comprising:a substrate; an input channel waveguide formed on top of the substrate for receiving wavelength-multiplexed signal light at one end thereof; a plurality of output channel waveguides formed in parallel to the input channel waveguide for outputting split output signal light from respective one ends thereof; a fan-shaped slab waveguide, one end of which is connected to the other end of said input channel waveguide, and to the other ends of said output channel waveguides; an array of channel waveguides, one end of which is connected to the other end of the fan-shaped slab waveguide such that lengths of the channel waveguides are successively elongated by a desired variation &Dgr;L; and a Fabry-Perot resonator array connected to the other end of the array of channel waveguides at one end thereof such that lengths of the resonators are successively elongated by twice said waveguide length variation &Dgr;L.