Sensitive strain measurements with a fiber Bragg-grating ring resonator

P. Malara; C. E. Campanella; A. Giorgini; S. Avino; R. Zullo; G. Gagliardi; P. De Natale

doi:10.1117/12.2059641

2 June 2014 Sensitive strain measurements with a fiber Bragg-grating ring resonator

P. Malara, C. E. Campanella, A. Giorgini, S. Avino, R. Zullo, G. Gagliardi, P. De Natale

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 915706 (2014) https://doi.org/10.1117/12.2059641
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

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.

Citation Download Citation

P. Malara, C. E. Campanella, A. Giorgini, S. Avino, R. Zullo, G. Gagliardi, and P. De Natale "Sensitive strain measurements with a fiber Bragg-grating ring resonator", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915706 (2 June 2014); https://doi.org/10.1117/12.2059641

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