Patent ID: 6829418
Filing Date: 2004-12-07
Classification: G02B

Abstract:
A core of a waveguide of an optical waveguide circuit device, which is a core of an arrayed waveguide grating optical multiplexer/demultiplexer, said optical waveguide circuit device including a substrate having a cleavage plane formed at least one of horizontally and perpendicularly to an orientation flat;a waveguide formed from a core on said substrate; and an incision line constructed by a groove or/and a separating slit formed by crossing at least one portion of the core of said waveguide; wherein a face of said incision line is formed at an arbitrary angle with respect to the cleavage plane of said substrate, said optical multiplexer/demultiplexer comprising: one or more optical input waveguides arranged side by side; a first slab waveguide connected to output ends of said optical input waveguides; an arrayed waveguide connected to an output end of said first slab waveguide and including a plurality of channel waveguides arranged side by side for transmitting light that has traveled through said first slab waveguide, said channel waveguides having different predetermined length; a second slab waveguide connected to an output end of said arrayed waveguide; and a plurality of optical output waveguides arranged side by side and connected to an output end of said second slab waveguide; wherein the incision line is set to a separating slit for separating at least one of said first and second slab waveguides; the separating slit is formed to cross an optical path of at least one of said first and second slab waveguides; a slide moving member slides and moves at least one side of the separating slab waveguide separated with this separating slit along said separating face depending on a temperature of AWG; and a light transmission central wavelength of an arrayed waveguide grating type optical multiplexer/demultiplexer is shifted by a slide moving operation of said slide moving member depending on the temperature.