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Proceedings Paper

High-performance multiplexed vibration sensor system based on fiber lasers
Author(s): Hao Xiao; Yongjie Wang; Fang Li; Yuliang Liu
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Paper Abstract

This paper describes a high-performance multiplexed vibration sensor system using fiber lasers. A serial vibration sensor array consists of four short cavity fiber lasers. The system employs a single, polarization-insensitive, unbalanced Michelson interferometer to translate individual laser wavelength shifts induced by vibration signals into interferometer phase shifts. A dense wavelength division demultiplexor (DWDM) with high channel isolation is inserted to demultiplex each laser signal as a wavelength filter. Finally, a digital phase demodulator based on the phase generated carrier technique is used to achieve high-resolution interrogation. Experimental results show that no observable crosstalk is measured on the output channels, and the minimal detectable acceleration of this system is ~200ng/&sqrt;Hz at 250Hz, which is fundamentally limited by the frequency noise of the lasers.

Paper Details

Date Published: 26 November 2007
PDF: 7 pages
Proc. SPIE 6830, Advanced Sensor Systems and Applications III, 683019 (26 November 2007); doi: 10.1117/12.755428
Show Author Affiliations
Hao Xiao, Institute of Semiconductors (China)
Yongjie Wang, Institute of Semiconductors (China)
Fang Li, Institute of Semiconductors (China)
Yuliang Liu, Institute of Semiconductors (China)

Published in SPIE Proceedings Vol. 6830:
Advanced Sensor Systems and Applications III
Yun-Jiang Rao; Yanbiao Liao; Gang-Ding Peng, Editor(s)

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