Distributed fiber strain sensor with 1 kHz sampling rate based on Brillouin optical correlation domain analysis

Kwang-Yong Song; Kazuo Hotate

doi:10.1117/12.734429

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18 October 2007 Distributed fiber strain sensor with 1 kHz sampling rate based on Brillouin optical correlation domain analysis

Kwang-Yong Song, Kazuo Hotate

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Proceedings Volume 6770, Fiber Optic Sensors and Applications V; 67700J (2007) https://doi.org/10.1117/12.734429
Event: Optics East, 2007, Boston, MA, United States

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.

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Kwang-Yong Song and Kazuo Hotate "Distributed fiber strain sensor with 1 kHz sampling rate based on Brillouin optical correlation domain analysis", Proc. SPIE 6770, Fiber Optic Sensors and Applications V, 67700J (18 October 2007); https://doi.org/10.1117/12.734429

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