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Highly sensitive fiber Bragg grating-based pressure sensor using side-hole packaging

Sebastian, Suneetha and Sridhar, S and Prasad, P Shiva and Asokan, S (2019) Highly sensitive fiber Bragg grating-based pressure sensor using side-hole packaging. In: APPLIED OPTICS, 58 (1). pp. 115-121.

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Official URL: https://doi.org/10.1364/AO.58.000115


In this work, an analysis of pressure response of a fiber Bragg grating (FBG) sensor in a side-hole package is presented using the finite element method. Various parameters of the side-hole packaging such as hole radius, the distance of separation between them, the radius and length of the package, and the choice of the package material are considered and optimized in order to promote maximum pressure sensitivity of the FBG sensor. This investigation on optimization of the side-hole package parameters gives rise to pressure sensitivity of nearly 10(5) times as compared with the bare FBG sensor, with the numerical values of 3 pm/MPa for a bare FBG sensor to similar to 280,000 pm/MPa for an optimized side-hole package FBG sensor. Such high-pressure sensitivity of an FBG sensor is being reported for the very first time in this work, to the best of our knowledge, and can be considered as the initial step toward the realization of a highly sensitive hydrophone based on FBG for sensing underwater acoustic signals. (C) 2018 Optical Society of America

Item Type: Journal Article
Additional Information: Copyright of this article belongs to OPTICAL SOC AMER
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited: 28 Jan 2019 09:22
Last Modified: 28 Jan 2019 09:22
URI: http://eprints.iisc.ac.in/id/eprint/61481

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