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Optical acoustic detector based on a fiber Fabry-Perot interferometer.
Hee Su Park1, Graham Thursby, Brian Culshaw
1Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow G1 1XW, United Kingdom. heesu@kaist.ac.kr
Applied Optics
|February 25, 2005
Summary
A new optical acoustic detector using a bias-controlled fiber Fabry-Perot interferometer offers higher sensitivity and broad bandwidth. This technology enables advanced noncontact characterization of microsamples with laser ultrasound.
Area of Science:
- Optics
- Acoustics
- Interferometry
Background:
- Conventional optical acoustic detectors have limitations in sensitivity and bandwidth.
- Laser ultrasound techniques require sensitive and broad-bandwidth detection methods for microsample characterization.
Purpose of the Study:
- To introduce a novel optical acoustic detector.
- To demonstrate its performance for laser ultrasound applications.
Main Methods:
- Development of a bias-controlled fiber Fabry-Perot interferometer.
- Characterization of the detector's bandwidth and sensitivity.
Main Results:
- The detector exhibits a broad bandwidth from 10 MHz to several gigahertz.
- Achieved higher sensitivity compared to conventional systems.
Conclusions:
- The novel detector is suitable for noncontact characterization of microsamples using laser ultrasound.
- It offers improved performance over existing technologies.