A mode-locked fibre laser temperature independent strain sensor based on intracavity pulse interference


High resolution, accurate strain sensors find vital applications in civil, aerospace, and mechanical engineering. Photonic solutions, especially fibre Bragg gratings, despite being promising platforms for strain sensing in harsh environments, and achieving microstrain resolution, suffer from strong sensitivity to temperature fluctuations and require expensive optical detection methods. To tackle these challenges, in this work we present a mode-locked fibre laser strain sensor based on intracavity pulse interference. Our all-fibre sensor, using an intracavity Mach-Zehnder interferometer architecture achieves 20 microstrain resolution with linear response over a 4 millistrain range. Our proposed sensor does not require external locking, and it is environmentally stable, decoupling temperature and strain effects. Furthermore, through a full electronic read-out in radio-frequency domain, our solution can bypass expensive and bulky optical detection. These features pave the way for low-cost and robust photonic strain sensors technology with disruptive real world impact.

Publication DOI: https://doi.org/10.1016/j.optlaseng.2024.108040
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences > School of Computer Science and Digital Technologies
College of Engineering & Physical Sciences
Funding Information: H.K. and A.M.P. acknowledge support from the EPSRC project EP/W002868/1. A.M.P. and B.S. acknowledge support from the Royal Academy of Engineering through the Research Fellowship scheme.
Additional Information: Copyright © 2024 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/).
Uncontrolled Keywords: Laser strain sensor,Mach-Zehnder interferometer,Mode-locked fibre laser,Electronic, Optical and Magnetic Materials,Mechanical Engineering,Atomic and Molecular Physics, and Optics,Electrical and Electronic Engineering
Publication ISSN: 1873-0302
Data Access Statement: Data will be made available on request.
Last Modified: 14 May 2024 07:31
Date Deposited: 05 Feb 2024 10:42
Full Text Link:
Related URLs: https://linking ... 143816624000204 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2024-05-01
Published Online Date: 2024-02-02
Accepted Date: 2024-01-10
Authors: Kbashi, Hani J. (ORCID Profile 0000-0002-6343-248X)
Sheil, Brian B.
Perego, Auro M. (ORCID Profile 0000-0001-5211-6513)



Version: Published Version

License: Creative Commons Attribution

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