Characterization of Bragg spectrum shifts in cascaded FBG arrays for thermal sensing

Anas Hambali Bin Ahmad Abas; Mohammad Syuhaimi Ab-Rahman

doi:10.2478/jee-2026-0051

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Characterization of Bragg spectrum shifts in cascaded FBG arrays for thermal sensing

Journal of Electrical Engineering

Volume 77 (2026): Issue 5 (October 2026)

By: Anas Hambali Bin Ahmad Abas and Mohammad Syuhaimi Ab-Rahman

Open Access

|Oct 2026

Abstract

This paper investigates the temperature-sensing performance of a series-configured Fiber Bragg Grating (FBG) sensing network integrated within an optical communication system. Two homogeneous FBG sensors were modelled using OptiSystem 22.0 and monitored using a Wavelength Division Multiplexing (WDM) interrogator. Linear regression analysis yielded a temperature sensitivity of 1.67 pm/°C (R²=0.999), demonstrating an excellent linear relationship between temperature and Bragg wavelength shift. The results demonstrate a positive relationship between temperature and wavelength shift, indicating the capability of cascaded FBG sensors for multipoint thermal monitoring applications. The findings highlight the potential of series-connected FBG arrays for integration into future optical sensing and communication networks.

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Articles in this issue

DOI: https://doi.org/10.2478/jee-2026-0051 | Journal eISSN: 1339-309X (formerly 1335-3632) | Journal ISSN: 1335-3632

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Language: English

Page range: 536 - 542

Submitted on: Jun 28, 2026

Published online: Oct 11, 2026

Published in print: Oct 1, 2026

Published by: Slovak University of Technology in Bratislava

In partnership with: Paradigm Publishing Services

Keywords:

fiber Bragg grating,

temperature sensing,

cascaded FBG,

multipoint thermal monitoring

Related subjects:

Engineering,

Introductions and overviews,

Engineering, other

© 2026 Anas Hambali Bin Ahmad Abas, Mohammad Syuhaimi Ab-Rahman, published by Slovak University of Technology in Bratislava
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Volume 77 (2026): Issue 5 (October 2026)