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Proceedings Paper

Adaptive holography for optical sensing applications
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Paper Abstract

Adaptive holography is a promising method for high sensitivity phase modulation measurements in the presence of slow perturbations from the environment. The technique is based on the use of a nonlinear recombining medium, here an optically addressed spatial light modulator specifically realized to operate at 1.55 μm. Owing to the physical mechanisms involved, the interferometer adapts to slow phase variations within a range of 5-10 Hz, thus filtering out low frequency noise while transmitting higher frequency phase modulations. We present the basic principles of the adaptive interferometer and show that it can be used in association with a sensing fiber in order to detect phase modulations. Finally, a phase-OTDR architecture using the adaptive holographic interferometer is presented and shown to allows the detection of localized perturbations along the sensing fiber.

Paper Details

Date Published: 7 March 2016
PDF: 7 pages
Proc. SPIE 9763, Slow Light, Fast Light, and Opto-Atomic Precision Metrology IX, 97631A (7 March 2016); doi: 10.1117/12.2220218
Show Author Affiliations
S. Residori, INLN, CNRS, Univ. de Nice-Sophia Antipolis (France)
U. Bortolozzo, INLN, CNRS, Univ. de Nice-Sophia Antipolis (France)
A. Peigné, Thales Underwater Systems (France)
S. Molin, Thales Research and Technology (France)
P. Nouchi, Thales Research and Technology (France)
D. Dolfi, Thales Research and Technology (France)
J. P. Huignard, Jphopto (France)

Published in SPIE Proceedings Vol. 9763:
Slow Light, Fast Light, and Opto-Atomic Precision Metrology IX
Selim M. Shahriar; Jacob Scheuer, Editor(s)

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