Patent ID: 6418249
Filing Date: 2002-07-09
Classification: G02B

Abstract:
An optical multiplexer/demultiplexer having a substrate on which an arrayed waveguide grating comprised of a plurality of waveguides having waveguide lengths different from one another, first and second slab waveguides respectively connected to both ends of the grating, a plurality of first waveguides adapted to output an optical signal toward the first slab waveguide, and a plurality of second waveguides adapted to receive an optical signal output from the second slab waveguide are formed, the improvement comprising:at least one of said plurality of first waveguides having a slab-waveguide-side end face placed thereof apart from a first-waveguide-side end face of said first slab waveguide and obliquely extending at an acute angle to an optical axis of said at least one of said plurality of first waveguides as viewed in a plane.