Acousto-optic device and fabrication method of acousto-optic...

Details Acousto-optic device and fabrication method of acousto-optic... Acousto-optic device and fabrication method of acousto-optic...

2007-03-22

2008-09-30

Sanghavi, Hemang (Department: 2874)

Optical waveguides

Directional optical modulation within an optical waveguide

C385S007000, C385S011000

Reexamination Certificate

active

07430344

ABSTRACT:
An acousto-optic device is disclosed which can achieve both of suppression of secular change and prevention of device damage and can maintain a stabilized wavelength selection filtering operation. The acousto-optic device includes a substrate on which a SAW guide for guiding a surface acoustic wave and an optical waveguide for guiding an optical wave are provided. A pyro-electricity coping conductive wiring pattern is provided in a region of the substrate other than the SAW guide and neutralizes polarization charge generated on a surface of the substrate.

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U.S. Appl. No. 10/945,923, filed Sep. 22, 2004, Hiroshi Miyata, Fujitsu Limited, Kawasaki, Japan.

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