Diameter and tensile strain measurements of optical nanofibers using Brillouin reflectometry

Adrien Godet; Abdoulaye Ndao; Vincent Pêcheur; Sylvie Lebrun; Gilles Pauliat; Thibaut Sylvestre; Jean-Charles Beugnot; Kien Phan Huy

doi:10.1117/12.2306838

9 May 2018 Diameter and tensile strain measurements of optical nanofibers using Brillouin reflectometry

Adrien Godet, Abdoulaye Ndao, Vincent Pêcheur, Sylvie Lebrun, Gilles Pauliat, Thibaut Sylvestre, Jean-Charles Beugnot, Kien Phan Huy

Author Affiliations +

Proceedings Volume 10681, Micro-Structured and Specialty Optical Fibres V; 106810K (2018) https://doi.org/10.1117/12.2306838
Event: SPIE Photonics Europe, 2018, Strasbourg, France

Abstract

We demonstrate a simple and efficient technique that allows for a complete characterization of silica-based tapered optical fibers with sub-wavelength diameters ranging from 0.5 μm to 1.2 μm. The technique is based on Brillouin reflectometry using a single-ended heterodyne detection. It has a high precision sensitivity down to 1% owing to the strong dependence of the Brillouin spectrum on the taper diameter. We further investigate the tensile strain dependence of the Brillouin spectrum for an optical microfiber up to 5% of elongation. The results show strong dependences of several Brillouin resonances with different strain coefficients ranging from 290 MHz/% to 410 MHz/% with a specific nonlinear deviation at high strain. Those results therefore show that optical micro and nanofibers could find potential application for sensitive strain optical sensing.

Citation Download Citation

Adrien Godet, Abdoulaye Ndao, Vincent Pêcheur, Sylvie Lebrun, Gilles Pauliat, Thibaut Sylvestre, Jean-Charles Beugnot, and Kien Phan Huy "Diameter and tensile strain measurements of optical nanofibers using Brillouin reflectometry", Proc. SPIE 10681, Micro-Structured and Specialty Optical Fibres V, 106810K (9 May 2018); https://doi.org/10.1117/12.2306838

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