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Proceedings Paper

Fiber-optic ring interferometry for ultrasonic sensing: a novel approach
Author(s): Vadim V. Ivanov; Mikhail A. Novikov; Sergey S. Ustavshikov; Alexander N. Sadkov
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Paper Abstract

Ring interferometer for ultrasonic sensing with homodyne amplification of interference signal is proposed and experimentally investigated. Owing to an inherent mechanism of suppression of laser phase noise, the proposed interferometer is significantly less critical to the path imbalance between signal and reference waves than classical interferometers with homodyne amplification (Michelson and Mach-Zander). Experiment shows that actual performance of fiber optic homodyne ring interferometer is seriously corrupted by the backscattering interference noise. Backscattering noise-free, non-ring topology of time-delay homodyne interferometer with laser phase noise rejection is discussed.

Paper Details

Date Published: 26 October 2007
PDF: 8 pages
Proc. SPIE 6796, Photonics North 2007, 67962A (26 October 2007); doi: 10.1117/12.778909
Show Author Affiliations
Vadim V. Ivanov, Institute for Physics of Microstructures (Russia)
Mikhail A. Novikov, Institute for Physics of Microstructures (Russia)
Sergey S. Ustavshikov, Institute for Physics of Microstructures (Russia)
Alexander N. Sadkov, Institute for Physics of Microstructures (Russia)

Published in SPIE Proceedings Vol. 6796:
Photonics North 2007
John Armitage, Editor(s)

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