| 摘要 |
A traveling wave optical modulator including an optical waveguide substrate made of a ferrodielectric electro-optic single crystal and having a pair of opposed main planes, an optical waveguide formed on one of the main planes, at least one pair of electrodes provided on the other main plane of the optical waveguide to apply a voltage for modulating a light propagating the optical waveguide, a fixing substrate bonded to said one of the main planes of the optical waveguide via an adhesive layer, said adhesive layer covering the optical waveguide and made of an adhering agent having a refractive index lower than that of the electro-optic single waveguide.
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