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Proceedings Paper

High-frequency strain measurements using a laser diode with a fiber Bragg grating external reflector
Author(s): Shai Berger; Myo Myint Ohn; Shang Yuan Huang; A. Tino Alavie; Raymond M. Measures
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Paper Abstract

A technique for detection of high-frequency strain using an AR-coated laser diode with a fiber Bragg grating to form a short (approximately 1 cm) external cavity is reported. The laser system becomes a single mode, narrow-linewidth (30 MHz) source under the influence of the grating's feedback. An interferometric detection technique was used to demodulate the strain signals generated by a piezoelectric transducer into a steel block. The sensing system was able to detect frequency components up to 140 kHz.

Paper Details

Date Published: 25 October 1996
PDF: 5 pages
Proc. SPIE 2839, Fiber Optic and Laser Sensors XIV, (25 October 1996); doi: 10.1117/12.255359
Show Author Affiliations
Shai Berger, Univ. of Toronto (Canada)
Myo Myint Ohn, Univ. of Toronto (Canada)
Shang Yuan Huang, Univ. of Toronto (Canada)
A. Tino Alavie, Univ. of Toronto (Canada)
Raymond M. Measures, Univ. of Toronto (Canada)

Published in SPIE Proceedings Vol. 2839:
Fiber Optic and Laser Sensors XIV
Ramon P. DePaula; John W. Berthold, Editor(s)

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