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Proceedings Paper

Temperature and refractive index measurements by using a microcavity engraved with femtosecond laser in multimode fiber
Author(s): Rodrigo Fiorin; Jociel L. da S. Adachi; Valmir de Oliveira; Hypolito J. Kalinowski; Ricardo C. Kamikawachi; Ilda Abe
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Paper Abstract

We report an optical fiber multiparameter sensor for refractive index and temperature measurements. The proposed sensor is composed by a microcavity in multimode fiber, assisted by Bragg gratings (FBGs) in singlemode fiber. The microcavity is engraved in a multimode optical fiber by using the femtosecond laser micromachining. The sensor is characterized through microcavity immersion in water and based on its temperature variation. The results show that it is possible to obtain refractive index and temperature measurements with sensitivities of 1625 μW/RIU (refractive index unit) and of 0.23 μW/°C, with resolution of 1.8 × 10-4 RIU and of 1.3°C.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103234Q (23 April 2017); doi: 10.1117/12.2265827
Show Author Affiliations
Rodrigo Fiorin, Univ. Tecnológica Federal do Paraná (Brazil)
Jociel L. da S. Adachi, Univ. Tecnológica Federal do Paraná (Brazil)
Valmir de Oliveira, Univ. Tecnológica Federal do Paraná (Brazil)
Hypolito J. Kalinowski, Univ. Tecnológica Federal do Paraná (Brazil)
Ricardo C. Kamikawachi, Univ. Tecnológica Federal do Paraná (Brazil)
Ilda Abe, Univ. Tecnológica Federal do Paraná (Brazil)


Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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