Title:
【発明の名称】導波型光デバイス
Document Type and Number:
Japanese Patent JP2850950
Kind Code:
B2
Abstract:
In an optical waveguide device which is typically for use as a waveguide modulator or switch and comprises a substrate exhibiting an electrooptic effect, an input and an output waveguide, first and second phase shift waveguides, a dielectric buffer layer on the substrate and the input, the output, and the phase shift waveguides, and a signal electrode and a ground electrode on the buffer layer to overlie on the phase shift electrodes and which may further comprise an additional ground electrode to form a CPW structure rather than an ASL or an ACPS structure, the buffer layer has a thickness which decreases continuously or stepwise from an outer edge to an inner edge of each of the first and the second waveguides. Preferably, a ratio of a thin thickness at the inner edges to a predetermined thickness at the outer edges and outwardly thereof is between 0.25 to 0.9. Another ratio of a width of the signal electrode to a gap between the signal electrode and the ground electrode on the second waveguide is between 1 and 0.1.
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Inventors:
MADABUSHI RANGARAJU
Application Number:
JP761696A
Publication Date:
January 27, 1999
Filing Date:
January 19, 1996
Export Citation:
Assignee:
NIPPON DENKI KK
International Classes:
G02F1/035; G02F1/225; G02B6/12; (IPC1-7): G02F1/035
Domestic Patent References:
| JPH07306324A | ||||
| JPH04149408A | ||||
| JPH0561009A | ||||
| JPH04288531A |
Attorney, Agent or Firm:
Yosuke Goto (2 outside)