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Proceedings Paper

Simultaneous measurement for temperature and strain by use of Sagnac interferometer with controlled sensitivity
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Paper Abstract

We propose a novel approach for resolving temperature and strain variations by use of Sagnac interferometer incorporating two types of high birefringence fibers (HBFs) and a polarization controller. The two types of HBFs are spliced together to act as the sensing head for temperature and strain discrimination. The detected parameters are two wavelength dips over a broad wavelength range in the transmission spectrum of the Sagnac interferometer, whose sensitivity responses to temperature and strain both depend on those of the two HBFs. As a result, the sensitivity responses can be controlled by adjusting the polarization controller adjacent to the sensing head to shift the wavelength dips and then change their degrees of dependence on the two HBFs.

Paper Details

Date Published: 16 May 2008
PDF: 4 pages
Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70041Y (16 May 2008); doi: 10.1117/12.785896
Show Author Affiliations
Guoyong Sun, Gwangju Institute of Science and Technology (South Korea)
Dae Seung Moon, Gwangju Institute of Science and Technology (South Korea)
Aoxiang Lin, Gwangju Institute of Science and Technology (South Korea)
Won-Taek Han, Gwangju Institute of Science and Technology (South Korea)
Youngjoo Chung, Gwangju Institute of Science and Technology (South Korea)


Published in SPIE Proceedings Vol. 7004:
19th International Conference on Optical Fibre Sensors
David Sampson; Stephen Collins; Kyunghwan Oh; Ryozo Yamauchi, Editor(s)

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