| 摘要 |
The present invention provides an optical wavelength filter, in which the light of a particular wavelength in a first linear polarization inputted from the input end of an optical waveguide formed near the surface of a substrate is transformed into a second linear polarization perpendicular to the first linear polarization by means of an elastic surface wave generated by a reed screen type electrode composed of a plurality of finger electrode portions formed on the input end side of the optical waveguide, and said plurality of finger electrode portions formed in a circular arc shape are disposed each having an angle for correcting the deflection of the propagation direction of the elastic surface wave so that the elastic surface wave converges at a desired position.
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