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Proceedings Paper

Multiplexing of white-light and polarimetric fiber-optic sensors for application in engineering mechanics
Author(s): Wojtek J. Bock; Waclaw Urbanczyk; Andrzej Barwicz
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Paper Abstract

We present an interferometric and a polarimetric fiber-optic sensor systems employing highly birefringent fibers for stress monitoring in civil engineering applications. Both systems are designed to be used with concrete-embeddable pressure cells optimized for stress measurement inside a concrete or soil medium. The concept of coherence multiplexing was applied in the interferometric system. Serial and serial-parallel configurations of this system were built and tested. In the serial configuration, four sensors were multiplexed, two for pressure and two for temperature measurement. In the serial-parallel configuration, eight sensors were multiplexed, four for pressure measurements and four for temperature measurements. In its present form, the polarimetric system employs a space-division multiplexing concept and it contains up to four pressure sensors. The overall accuracy of white-light and polarimetric systems, including temperature drift in a wide range of temperatures, is better than 1% at pressures up to 40 MPa.

Paper Details

Date Published: 4 December 1998
PDF: 7 pages
Proc. SPIE 3491, 1998 International Conference on Applications of Photonic Technology III: Closing the Gap between Theory, Development, and Applications, (4 December 1998); doi: 10.1117/12.328648
Show Author Affiliations
Wojtek J. Bock, Univ. du Quebec a Hull (Canada)
Waclaw Urbanczyk, Technical Univ. of Wroclaw (Poland)
Andrzej Barwicz, Univ. du Quebec a Trois-Rivieres (Canada)


Published in SPIE Proceedings Vol. 3491:
1998 International Conference on Applications of Photonic Technology III: Closing the Gap between Theory, Development, and Applications
George A. Lampropoulos; Roger A. Lessard, Editor(s)

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