@inproceedings{aae357f46bb54105bb6ec5969f22401b,
title = "An etched chirped fiber Bragg grating for measurement of refractive index and temperature pattern",
abstract = "In this work, partially etched chirped fiber Bragg grating (pECFBG) for the real-time multi-parameter measurement of temperature and refractive index is proposed. The sensor is fabricated by wet-etching a portion of a linearly chirped FBG with linear chirp profile. Obtained CFBG has two active areas: the unetched part of the grating that can be used either as a uniform temperature sensor, or to detect thermal gradients experienced through the grating length; the etched part, besides having a similar thermal sensitivity, is exposed to refractive index sensing through the variations of external refractive index. Overall, the pECFBG structure behaves as a compact sensor with multi-parameter capability, that can both measure temperature and refractive index on the same grating, but also spatially resolve temperature detection through the grating section. The results have been validated through both a model and experimental setup, showing that the mutual correlation algorithm applied to different spectral parts of the grating is able to discriminate between uniform and gradient-shaped temperature profiles, and refractive index changes. The reflected spectra showed a clear correlation between the RI change of the surrounding media and spectral shift with temperature variations.",
keywords = "chirped fiber Bragg grating (cFBG), etching, FBG sensors, fiber optic sensors, hydrofluoric acid (HF), interrogator, refractive index (RI), sensitivity, temperature pattern",
author = "M. Shaimerdenova and T. Ayupova and M. Sypabekova and S. Korganbayev and A. Bekmurzayeva and K. Dukenbayev and C. Molardi and D. Tosi",
note = "Funding Information: Research supported by ORAU project “LIFESTART: Lab-in-a-fiber for smart thermo-haptic treatment of tumors”. Research project was funded by the autonomous organization of education “Nazarbayev University within its Development Program of the Research University 2016-2020”. Publisher Copyright: {\textcopyright} 2018 Copyright SPIE. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.; Optics in Health Care and Biomedical Optics VIII 2018 ; Conference date: 11-10-2018 Through 13-10-2018",
year = "2018",
month = jan,
day = "1",
doi = "10.1117/12.2502471",
language = "English",
volume = "10820",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Ying Gu and Qingming Luo and Xingde Li and Yuguo Tang and Dan Zhu",
booktitle = "Optics in Health Care and Biomedical Optics VIII",
address = "United States",
}