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Proceedings Paper

Distributed fiber strain sensor with 1 kHz sampling rate based on Brillouin optical correlation domain analysis
Author(s): Kwang-Yong Song; Kazuo Hotate
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Paper Abstract

We demonstrate distributed measurement of dynamic strain with 1 kHz sampling rate, the highest speed ever reported in Brillouin-based fiber sensors, using the simplified Brillouin optical correlation domain analysis system. Pump and probe waves are generated by direct current modulation of a laser diode applying a pre-compensated rectangular waveform at 100 kHz, and an unbalanced Mach-Zehnder delay line is introduced to the probe wave for the suppression of noise in high speed lock-in detection. Brillouin gain spectrum of single position is acquired at the sampling rate of 1 kHz with position-selectivity, and several kinds of strain variations up to 200 Hz are successfully measured with 10 cm spatial resolution and 20 m measurement range.

Paper Details

Date Published: 18 October 2007
PDF: 8 pages
Proc. SPIE 6770, Fiber Optic Sensors and Applications V, 67700J (18 October 2007); doi: 10.1117/12.734429
Show Author Affiliations
Kwang-Yong Song, Univ. of Tokyo (Japan)
Kazuo Hotate, Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 6770:
Fiber Optic Sensors and Applications V
Eric Udd, Editor(s)

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