| 摘要 |
An optical device includes an optical waveguide including a core and a cladding, and includes a wide optical waveguide. An input optical waveguide is connected with one side the wide waveguide and output optical waveguides are connected to an opposite side of the wide waveguide. Center intervals between adjacent ones of the output waveguides meet either a condition 1 that the center intervals are wider than or equal to 4lambda', where lambda' is the optical wavelength in the wide waveguide, or they meet a condition 2 that the center intervals are narrower than 4lambda' and adjacent output waveguides are disposed at intervals shorter than a length in which optical signals that propagate through each of the output waveguides interact with each other.
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