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Bend monitoring and refractive index sensing using flat fibre and multicore bragg gratings

Holmes, C. and Ambran, S. and Cooper, P. A. and Webb, A. S. and Gates, J. S. and Gawith, C. B. E. and Sahu, J. K. and Smith, P. G. R. (2020) Bend monitoring and refractive index sensing using flat fibre and multicore bragg gratings. Measurement Science and Technology, 31 (8). ISSN 0957-0233

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Official URL: https://dx.doi.org/10.1088/1361-6501/ab8710

Abstract

A planarized optical fibre designed for two-dimensional bend monitoring and external refractive index sensing is presented. The approach uses two single-mode waveguides each containing a set of spectrally multiplexed Bragg gratings. To achieve sensitivity to bending and external refractive index, the cladding material of the fibre is partially removed through physical machining. This acts to offset the neutral axis, increasing bend sensitivity, and exposes the evanescent field of the guided mode, permitting external refractive index monitoring. Through collective monitoring of the Bragg grating array, real time, multiparameter sensing is attainable, allowing new capability for intelligent monitoring.

Item Type:Article
Uncontrolled Keywords:cladding (coating), evanescent fields, optical fibers
Subjects:T Technology > T Technology (General)
Divisions:Malaysia-Japan International Institute of Technology
ID Code:86730
Deposited By: Narimah Nawil
Deposited On:30 Sep 2020 09:05
Last Modified:23 Feb 2021 03:18

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