Structured light enhanced machine learning for fiber bend sensing

Angelucci, S., Chen, Z. , Skvarenina, Ľ., Clark, A. W. , Vallés, A. and Lavery, M. P.J. (2024) Structured light enhanced machine learning for fiber bend sensing. Optics Express, 32(5), pp. 7882-7895. (doi: 10.1364/OE.513829)

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The intricate optical distortions that occur when light interacts with complex media, such as few- or multi-mode optical fiber, often appear random in origin and are a fundamental source of error for communication and sensing systems. We propose the use of orbital angular momentum (OAM) feature extraction to mitigate phase-noise and allow for the use of intermodal-coupling as an effective tool for fiber sensing. OAM feature extraction is achieved by passive all-optical OAM demultiplexing, and we demonstrate fiber bend tracking with 94.1% accuracy. Conversely, an accuracy of only 14% was achieved for determining the same bend positions when using a convolutional-neural-network trained with intensity measurements of the output of the fiber. Further, OAM feature extraction used 120 times less information for training compared to intensity image based measurements. This work indicates that structured light enhanced machine learning could be used in a wide range of future sensing technologies.

Item Type:Articles
Additional Information:The work was supported by the Horizon 2020 Future and Emerging Technologies Open grant agreement "Super-pixels" No. 829116, the EPSRC (grant numbers EPSRC EP/T009047/1, EP/T517896/1, and EP/V030515/1), the BBSRC (grant numbers BB/T000627/1 and BB/N016734/1), The Leverhulme Trust (grant number. RPG-2018-149), Grant CEX2019-000910-S funded by MCIN /AEI/ 10.13039/ 501100011033, Fundació Cellex, Fundació Mir-Puig, Generalitat de Catalunya through CERCA.
Glasgow Author(s) Enlighten ID:Lavery, Professor Martin and Chen, Dr Zhaozhong and Clark, Professor Alasdair and Skvarenina, Dr Lubomir and Angelucci, Sara
Authors: Angelucci, S., Chen, Z., Skvarenina, Ľ., Clark, A. W., Vallés, A., and Lavery, M. P.J.
College/School:College of Science and Engineering
College of Science and Engineering > School of Engineering > Biomedical Engineering
College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Optics Express
Publisher:Optical Society of America
ISSN (Online):1094-4087
Published Online:08 February 2024
Copyright Holders:Copyright © 2024 The Authors
First Published:First published in Optics Express 32(5):7882-7895
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
312561EPSRC DTP 2020/21Christopher PearceEngineering and Physical Sciences Research Council (EPSRC)EP/T517896/1Research and Innovation Services
309846Decentralised water technologiesWilliam SloanEngineering and Physical Sciences Research Council (EPSRC)EP/V030515/1ENG - Infrastructure & Environment
172826DNA-directed construction of three-dimensional photosynthetic assembliesAlasdair ClarkBiotechnology and Biological Sciences Research Council (BBSRC)BB/N016734/1ENG - Biomedical Engineering
301408Macromolecular construction of nucleic acid networks directed by the flourous effect: A new paradigm for the programmable assembly of molecular informationAlasdair ClarkLeverhulme Trust (LEVERHUL)RPG-2018-149/ 170977ENG - Biomedical Engineering