| 摘要 |
PROBLEM TO BE SOLVED: To provide a waveguide type optical modulator capable of applying a uniform and sufficient electric field to an optical waveguide, even if deviations in current distribution due to skin effect is generated within an electrode, through which modulation signal flows. SOLUTION: In the waveguide type optical modulator 1A, the optical waveguide 2A, through which light is transmitted, is formed on a substrate 5 constituted of a semiconductor material, for example. Furthermore, a signal transmission conductive body 3A, which applies a modulation electric field for modulating the light transmitted through the optical waveguide 2A, is formed on the substrate 5. The signal transmission conductive body 3A is formed at a position, superimposed on the optical waveguide 2A and is inclined, at a prescribed angle with respect to the extending direction of the optical waveguide 2A, whereby the edge surface in the width direction intersects the optical waveguide 2A; and even if the frequency of a modulation signal is increased and the deviation in the current distribution due to skin effect is thus generated, the position at which electric field is applied is moved in the width direction of the optical waveguide 2A; and as the result, a uniform and ample electric field will be applied to the optical waveguide 2A. COPYRIGHT: (C)2008,JPO&INPIT
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