Scientific Results

Sensitive strain measurements with a fiber Bragg-grating ring resonator

Year: 2014

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

Autors Affiliation: Consiglio Nazionale Delle Ricerche, Istituto Nazionale di Ottica (INO), via Campi Flegrei, 34 – Comprensorio A. Olivetti, 80078 Pozzuoli (Naples), Italy; Dipartimento di Elettrotecnica Ed Elettronica, Politecnico di Bari, Via Edoardo Orabona 4, 70125 Bari, Italy

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.

Conference title:

KeyWords: Optical resonators; Sensors, Bragg wavelength; Frequency splittings; Intracavities; Novel strains; Ring resonator; Fiber Bragg gratings
DOI: 10.1117/12.2059641

Connecting to view paper tab on IsiWeb: Click here

This site uses cookies. If you decide to continue browsing we consider that you accept their use. For more information about cookies and how to delete them please read our Info Policy on cookies use.
Read more