Personal profile
Research interests
Optical fibres
Research interests
I am interested in how light travels along optical fibres, and in designing and making fibres so that the light travels in new and unusual ways. Examples include fibres that change along their lengths (eg tapered fibres), split and combine to form new waveguides (eg photonic lanterns), or incorporate patterns of air holes and other material variations across their structures (eg photonic crystal fibres and multi-core fibres). We gain understanding of these things by theory and simulations, and also by the use of our experimental facilities for fabricating fibres and post-processing them. This leads to benefits for applications such optical telecommunication, medical sensing and imaging, and astronomical instrumentation.
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Collaborations and top research areas from the last five years
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Research and Partnership Hubs for Health Technologies: Technologies for Experimental Medicine
Birks, T. (PI), Rusimova, K. (CoI) & Stone, J. (CoI)
Engineering and Physical Sciences Research Council
1/04/25 → 31/03/28
Project: Research council
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U-Care: Deep Ultraviolet Light Therapies
Birks, T. (PI), Knight, J. (CoI), Stone, J. (CoI), Wadsworth, W. (CoI) & Harrington, K. (Researcher)
Engineering and Physical Sciences Research Council
1/01/21 → 31/12/26
Project: Research council
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Quantum Data Centre of the Future
Mosley, P. (PI), Rusimova, K. (PI), Birks, T. (CoI) & Rusimova, K. (CoI)
Innovate UK, Innovate UK Business Connect
1/03/22 → 31/03/25
Project: Central government, health and local authorities
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IRC Proteus II
Birks, T. (PI), Knight, J. (CoI) & Stone, J. (Researcher)
Engineering and Physical Sciences Research Council
1/04/19 → 31/12/22
Project: Research council
Research output
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Measuring the number of modes guided by multi-mode hollow core fibres
Mears, R., Harrington, K., Wadsworth, W., Bird, D., Stone, J. & Birks, T., 23 Feb 2026, In: Optics Express. 34, 4, p. 6260-6275 16 p.Research output: Contribution to journal › Article › peer-review
Open Access -
Perspective: Hollow Core Optical Fibres for Ultraviolet and Visible Wavelengths
Mears, R., Harrington, K., Knight, J., Wadsworth, W., Stone, J. & Birks, T., 20 Jan 2026, (E-pub ahead of print) In: Advanced Science. 15 p., e17476.Research output: Contribution to journal › Article › peer-review
Open Access -
Highly multi-mode hollow core fibers
Mears, R., Harrington, K., Wadsworth, W. J., Stone, J. M. & Birks, T. A., 16 Jun 2025, In: Optics Express. 33, 12, p. 25669-25677 9 p.Research output: Contribution to journal › Article › peer-review
Open Access3 Link opens in a new tab Citations (SciVal) -
Mode counting in multimode anti-resonant hollow core fibres
Mears, R., Harrington, K., Stone, J. M., Wadsworth, W. J. & Birks, T. A., 27 Jun 2025, 2025 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2025. IEEE, p. 1 (2025 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2025).Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding
1 Link opens in a new tab Citation (SciVal) -
Multimode Imaging with Hollow-Core Fibres
Harrington, K., Neto, J. G. M. N., Mears, R., Rocha, J. C. A., Stone, J. M., Wadsworth, W. J., Jesus-Silva, A. J., Birks, T. A. & Phillips, D. B., 27 Jun 2025, 2025 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2025. U. S. A.: IEEE, (2025 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2025).Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding
Datasets
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Data for "High resolution air-clad imaging fibers"
Wood, H. (Creator), Harrington, K. (Creator), Knight, J. (Creator), Birks, T. (Creator) & Stone, J. (Creator), University of Bath, 27 Sept 2018
DOI: 10.15125/BATH-00554
Dataset
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Dataset for "Guidance of ultraviolet light down to 190 nm in a hollow-core optical fibre"
Mears, R. (Creator), Harrington, K. (Creator), Wadsworth, W. (Creator), Knight, J. (Creator), Stone, J. (Creator) & Birks, T. (Creator), University of Bath, 28 Feb 2024
DOI: 10.15125/BATH-01333
Dataset
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Data for the publication: Low index contrast imaging fibers
Stone, J. (Creator), Wood, H. (Researcher), Harrington, K. (Researcher) & Birks, T. (Project Member), University of Bath, 2017
DOI: 10.15125/BATH-00342
Dataset
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Data for Quantitative characterisation of imaging fibres
Wood, H. (Creator), Harrington, K. (Data Collector), Stone, J. (Researcher), Birks, T. (Project Manager) & Knight, J. (Project Leader), University of Bath, 2017
DOI: 10.15125/BATH-00325
Dataset
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Dataset for "Optical absorption spectrum reveals gaseous chlorine in anti-resonant hollow core fibres"
Harrington, K. (Creator), Mears, R. (Creator), Stone, J. (Creator), Wadsworth, W. (Creator), Knight, J. (Creator) & Birks, T. (Creator), University of Bath, 8 Oct 2024
DOI: 10.15125/BATH-01423
Dataset