Refractive index sensitivity in etched FBG in the visible range

Jean F. Kuhne; Rafael B. Nadas; Patricia L. Inácio; Ismael Chiamenti; Ricardo C. Kamicawachi; Hypolito José Kalinowski

doi:10.1117/12.2272227

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22 August 2017 Refractive index sensitivity in etched FBG in the visible range

Jean F. Kuhne, Rafael B. Nadas, Patricia L. Inácio, Ismael Chiamenti, Ricardo C. Kamicawachi, Hypolito José Kalinowski

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Proceedings Volume 10453, Third International Conference on Applications of Optics and Photonics; 104531R (2017) https://doi.org/10.1117/12.2272227
Event: Third International Conference on Applications of Optics and Photonics, 2017, Faro, Portugal

Abstract

A visible fiber Bragg grating (Vis-FBG) with wavelength peak centered at 673.07 nm was inscribed in a multimode fiber designed for infrared (IR) operation using a femtosecond (fs) laser emitting at 248 nm. The fiber cladding is removed by chemical etching in hydrofluoric acid solution (40%). The sensor refractive index response is determined by dipping the sensor into diluted glycerin solution at different concentrations with refractive index range from 1.3328 to 1.4607. The Vis-FBG performance is compared with an IR etched FBG (EFBG) with similar diameter. The sensitivity found for the Vis-FBG sensor is 15.71nm/RIU with a 6.34 x 10^-3 RIU resolution for a refractive index of 1.4607.

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Jean F. Kuhne, Rafael B. Nadas, Patricia L. Inácio, Ismael Chiamenti, Ricardo C. Kamicawachi, and Hypolito José Kalinowski "Refractive index sensitivity in etched FBG in the visible range", Proc. SPIE 10453, Third International Conference on Applications of Optics and Photonics, 104531R (22 August 2017); https://doi.org/10.1117/12.2272227

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