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US 10,310,299 B2Granted
Optical modulator and optical transmission device using optical modulator
AssigneeSumitomo Osaka Cement Co., Ltd.
InventorToru Sugamata
Life of this patent
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Abstract
A substrate (102) having a piezoelectric effect, optical waveguides (138a, 140a, 138b, 140b, and the like) formed on the substrate, and a plurality of bias electrodes (152a, 152b, and the like) that control an optical wave (s) which propagate through the optical waveguides are provided, and the bias electrodes are constituted and/or disposed such that an electrical signal applied to one of the bias electrodes is prevented from being received by another one of the bias electrodes through a surface acoustic wave.
Claims12
An optical modulator comprising:
- a substrate having a piezoelectric effect;
- an optical waveguide(s) formed on the substrate;
- and
- a plurality of bias electrodes that control an optical wave(s) which propagate through the optical waveguide(s),
- wherein each of the bias electrodes is an interdigital electrode which comprises one pair of comb-shaped conductor patterns interlocking with each other, and each of teeth of one of the comb-shaped conductor patterns in a pair extends with a respective interval against an adjacent tooth of another comb-shaped conductor pattern in said pair,
- wherein each of the teeth of the comb-shaped conductor patterns extends along the optical waveguide, and
- wherein the interval in the bias electrodes is set so as to impede a dither signal applied to one of the bias electrodes from being received by another one of the bias electrodes through a surface acoustic wave propagating on a surface of the substrate.
4 more elements
An optical modulator comprising:
- a substrate having a piezoelectric effect;
- an optical waveguide(s) formed on the substrate;
- and
- a plurality of bias electrodes that control an optical wave(s) which propagate through the optical waveguide(s),
- wherein each of the bias electrodes is an interdigital electrode which comprises one pair of comb-shaped conductor patterns interlocking with each other, and each of teeth of one of the comb-shaped conductor patterns in a pair extends with a respective interval against an adjacent tooth of another comb-shaped conductor pattern in said pair,
- wherein each of the teeth of the comb-shaped conductor patterns extends along the optical waveguide, and
- wherein a relative position between the bias electrodes is set so as to impede a dither signal applied to one of the bias electrodes from being received by another one of the bias electrodes through a surface acoustic wave propagating on a surface of the substrate.
4 more elements
Dependencies are inferred from the claim text.