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

Guoyong Sun; Dae Seung Moon; Aoxiang Lin; Won-Taek Han; Youngjoo Chung

doi:10.1117/12.785896

16 May 2008 Simultaneous measurement for temperature and strain by use of Sagnac interferometer with controlled sensitivity

Guoyong Sun, Dae Seung Moon, Aoxiang Lin, Won-Taek Han, Youngjoo Chung

Author Affiliations +

Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 70041Y (2008) https://doi.org/10.1117/12.785896
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia

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.

Citation Download Citation

Guoyong Sun, Dae Seung Moon, Aoxiang Lin, Won-Taek Han, and Youngjoo Chung "Simultaneous measurement for temperature and strain by use of Sagnac interferometer with controlled sensitivity", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70041Y (16 May 2008); https://doi.org/10.1117/12.785896

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