| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical wavelength multiplexer/demultiplexer in which low loss and a flat pass region characteristic are realized while a gap width between cores of an input side slab waveguide is made into a width, that is sufficiently buried by a clad material, and without making the pass region into a ripple state. SOLUTION: The optical wavelength is provided with an array waveguide diffraction grating which is made of a plurality of channel waveguides, the input side slab waveguide which is connected to one tip side of the array waveguide diffraction grating, an output side slab waveguide which is connected to other tip side of the array waveguide diffraction grating and an output channel waveguide which is connected to the output side slab waveguide. In the optical wavelength multiplexer/demultiplexer, a Mach-Zehnder circuit is connected to the input side slab waveguide. The width of the waveguide which constitutes of the Mach-Zehnder circuit is formed narrower at the connection section vicinity with the input side slab waveguide. COPYRIGHT: (C)2005,JPO&NCIPI |
