| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact and multichannel optical wavelength multiplexer/demultiplexer. SOLUTION: This optical wavelength multiplexer/demultiplexer has a substrate 6; an input waveguide 1; an input-side slab waveguide 2a connected with the input waveguide 1; an array waveguide 3 connected to the input-side slab waveguide 2a, comprising plural waveguides 3a, 3b,..., 3n having prescribed waveguide length differencesΔL; an output-side slab waveguide 2b connected to the array waveguide 3; and plural output waveguides 4a, 4b,..., 4n connected to the output-side slab waveguide 2b, demultiplexing and outputting a wavelength division multiplex optical signal. A specific refractive index differenceΔbetween a clad 9 and a core 7 constituting each the waveguide is set to a larger value than 0.8%. Thereby, a light confinement property inside the waveguide is improved to miniaturize the device and to realize multi-channel. |
