Personal profile
Research interests
Optical Fibres
I design, fabricate and study Photonic Crystal Fibres (PCFs), including Hollow Core Fibres. These optical fibres contain a microstructure on the scale of the wavelength of light which allows unprecedented control of the propagation of light in the fibre. My particular interests are in using PCFs for new lasers and light sources, with applications from fundamental metrology and quantum information to imaging for medical and life sciences.
Open Source Hardware
I investigate, develop and support Open Source Hardware for science. I am a member of the core development team of the OpenFlexure project, an open-source initiative focused on development of 3D printed, laboratory-grade digital microscopes and positioning stages, making high-quality microscopy accessible to all.
Expertise related to UN Sustainable Development Goals
In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This person’s work contributes towards the following SDG(s):
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SDG 3 Good Health and Well-being -
SDG 9 Industry, Innovation, and Infrastructure -
SDG 11 Sustainable Cities and Communities
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Collaborations and top research areas from the last five years
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SOPHI Project Laser Wavelength Study.
Wadsworth, W. (PI) & Rusimova, K. (CoI)
Defence Science and Technology Laboratory
1/12/25 → 13/03/26
Project: Central government, health and local authorities
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Semiconductor Hardware Ultraviolet Laser Sources for Wide Bandgap Materials
Wadsworth, W. (PI) & Mears, R. (Researcher)
Innovate UK, Innovate UK Business Connect
1/10/25 → 31/03/26
Project: Central government, health and local authorities
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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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International Collaboration Awards of the RS - Clean Air
Valev, V. (PI) & Wadsworth, W. (CoI)
1/12/20 → 30/11/23
Project: Research council
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Identifying the Chemical composition of air pollution particles (I.C.)
Valev, V. (PI), Knight, J. (CoI), Wadsworth, W. (CoI) & Wolverson, D. (CoI)
3/12/17 → 31/03/19
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., 19 Jan 2026, (Acceptance date) In: Optics Express.Research output: Contribution to journal › Article › peer-review
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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 Access2 Link opens in a new tab Citations (SciVal) -
Low spontaneous Brillouin scattering in anti-resonant hollow-core fibers in GHz frequency range
Dunagin, R. E., Mears, R., Bueno-Baques, D., Tyberkevych, V. S., Li, Y., Wadsworth, W. J., Celinski, Z., Novosad, V. & Bozhko, D. A., 11 Dec 2025, In: APL Photonics. 10, 12, 121303.Research output: Contribution to journal › Article › peer-review
Open Access -
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
Datasets
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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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Dataset for "Atomic dispensers for thermoplasmonic control of alkali vapor pressure in quantum optical applications"
Rusimova, K. (Creator), Slavov, D. (Creator), Pradaux-Caggiano, F. (Creator), Collins, J. (Creator), Gordeev, S. (Creator), Carbery, D. (Creator), Mosley, P. (Creator), Wadsworth, W. (Creator) & Valev, V. (Creator), University of Bath, 24 May 2019
DOI: 10.15125/BATH-00529
Dataset
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Data set for CLEO paper "Double Pass Gain in Helium-Xenon Discharges in Hollow Optical Fibres at 3.5μm"
Love, A. (Creator), Bateman, S. (Creator), Wadsworth, W. (Supervisor), Belardi, W. (Related Person) & Webb, C. E. (Related Person), University of Bath, 2015
DOI: 10.15125/BATH-00089
Dataset
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Supplementary materials for "Improvement of optical and mechanical properties of self-written polymer waveguides bridged single mode fibers"
Mohammed, P. (Creator) & Wadsworth, W. (Creator), University of Bath, 17 Dec 2018
DOI: 10.15125/BATH-00419
Dataset
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Dataset for "Single-mode solarization-free hollow-core fiber for ultraviolet pulse delivery"
Yu, F. (Creator), Cann, M. (Researcher), Brunton, A. (Project Member), Wadsworth, W. (Project Member) & Knight, J. (Project Leader), University of Bath, 13 Apr 2018
DOI: 10.15125/BATH-00441
Dataset