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Proceedings Paper

Sensitive strain measurements with a fiber Bragg-grating ring resonator
Author(s): P. Malara; C. E. Campanella; A. Giorgini; S. Avino; R. Zullo; G. Gagliardi; P. De Natale
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Paper Abstract

We describe a novel strain sensor based on a fiber Bragg grating (FBG) ring resonator. The spectrum of this resonator consists of equally-spaced resonances, exhibiting a frequency splitting proportional to the reflectivity of the intracavity FBG. A strain applied to the FBG causes a shift of the bragg wavelength, and thus a variation of the resonance splitting. The splitting is insensitive to the thermal/strain noise affecting the fiber in the region outside the FBG. The sensitivity and resolution of the sensor are analyzed in detail, showing that a subpicostrain resolution can be easily achieved with an optimized setup.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915706 (2 June 2014); doi: 10.1117/12.2059641
Show Author Affiliations
P. Malara, Istituto Nazionale di Ottica, CNR (Italy)
C. E. Campanella, Politecnico di Bari (Italy)
A. Giorgini, Istituto Nazionale di Ottica, CNR (Italy)
S. Avino, Istituto Nazionale di Ottica, CNR (Italy)
R. Zullo, Istituto Nazionale di Ottica, CNR (Italy)
G. Gagliardi, Istituto Nazionale di Ottica, CNR (Italy)
P. De Natale, Istituto Nazionale di Ottica, CNR (Italy)


Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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