Acoustoelectric conversion device

Details Acoustoelectric conversion device Acoustoelectric conversion device

2007-11-13

2007-11-13

Kwok, Helen (Department: 2856)

Measuring and testing

Vibration

Sensing apparatus

C073S649000, C356S499000

Reexamination Certificate

active

11116273

ABSTRACT:
In an acoustoelectric converter element, a light wave from a light source is introduced into a first optical waveguide of a vibration substrate, and diffracted by a diffraction grating disposed on the first optical waveguide. The diffracted light is directed to and detected by a photo detector. Here, the vibration substrate is so supported as to vibrate with respect to an acoustic wave. Therefore, the diffracted light detected by the photo detector is modulated by the acoustic wave, and a signal is output from the detector in accordance with the acoustic wave.

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