| 摘要 |
An optical waveguide includes: an optical waveguide core through which light propagates, at least one end portion of the optical waveguide core in a longitudinal direction thereof having an inclined surface; a reflective layer provided on the inclined surface and formed by a metal layer of silver or a silver alloy; a protective layer disposed to cover the reflective layer; and a cladding portion enclosing the optical waveguide core and having a lower refractive index than that of the optical waveguide core.
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