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Proceedings Paper

A novel twin-core fiber grating sensor system and its applications
Author(s): Yaowen Li; Gregory M. Bubel; David J. Kudelko; Man F. Yan; Matthew J. Andrejco
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Paper Abstract

We demonstrated a novel twin-core fiber grating sensor system for accurate and simultaneous measurements of temperature and strain. Specifically, we designed two cores with custom index and dopant profiles such that the gratings in these two cores have different temperature coefficients, but almost same strain coefficients. Our data also showed that both gratings had almost the same wavelength shift at the same deuterium concentration level in the fiber. This, together with the strain characteristics of the gratings, enables us to isolate the temperature measurement when strain, temperature and gaseous diffusion all apply to the sensor simultaneously. It makes our grating sensor extremely useful for hydrothermal down-hole temperature mapping applications.

Paper Details

Date Published: 20 April 2010
PDF: 8 pages
Proc. SPIE 7677, Fiber Optic Sensors and Applications VII, 76770D (20 April 2010); doi: 10.1117/12.849714
Show Author Affiliations
Yaowen Li, OFS Fitel LLC (United States)
Gregory M. Bubel, OFS Fitel LLC (United States)
David J. Kudelko, OFS Fitel LLC (United States)
Man F. Yan, OFS Fitel LLC (United States)
Matthew J. Andrejco, OFS Fitel LLC (United States)

Published in SPIE Proceedings Vol. 7677:
Fiber Optic Sensors and Applications VII
Alexis Mendez; Henry H. Du; Anbo Wang; Eric Udd; Stephen J. Mihailov, Editor(s)

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