Projects per year
Personal profile
Research interests
I am interested in light – how we can explain it, make it, and use it. In particular, how modern technology enables us to fabricate wavelength-scale structures which are then synthetic optical materials with previously unimaginable properties. Much of my time has been spent on developing photonic crystal fibres – a new technology for fibre design which has enabled new capabilities in fibre optics, and led to applications in areas as diverse as new light sources, high power laser delivery, and atomic physics. I work in the Centre for Photonics and Photonic Materials, within which we run a high-specification fibre fabrication area so that we can make and test new structures. I work closely with external partners including both Universities and Industry. My primary driver has been to discover new optical physics which can be used to do useful things.
Willing to supervise doctoral students
Low loss hollow core fibres
Generating new wavelengths using hollow core fibres
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Collaborations and top research areas from the last five years
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U-Care: Deep Ultraviolet Light Therapies
Birks, T., Knight, J., Stone, J. & Wadsworth, W.
Engineering and Physical Sciences Research Council
1/01/21 → 31/12/25
Project: Research council
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Ensuring the Future of Multi-User "Hands-On" NMR Spectroscopy at Bath
1/11/20 → 30/04/22
Project: Research council
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Ensuring the Future of Multi-User "Hands-On" NMR Spectroscopy at Bath
Knight, J., Lowe, J. & Lubben, A. T.
1/11/20 → 30/04/22
Project: Research council
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Impact Acceleration Award 3 - Additional Funding - Core Staff Costs
Engineering and Physical Sciences Research Council
1/04/20 → 30/06/22
Project: Research council
Research output
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Generation and characterization of frequency tunable sub-15-fs pulses in a gas-filled hollow-core fiber pumped by a Yb:KGW laser
Sabbah, M., Belli, F., Brahms, C., Yu, F., Knight, J. & Travers, J. C., 1 May 2023, In: Optics Letters. 48, 9, p. 2277-2280 4 p.Research output: Contribution to journal › Article › peer-review
Open Access -
Low-loss multi-mode anti-resonant hollow-core fibers
Wu, D., Yu, F., Wu, C., Zhao, M., Zheng, J., Hu, L. & Knight, J., 19 Jun 2023, In: Optics Express. 31, 13, p. 21870-21880 11 p.Research output: Contribution to journal › Article › peer-review
Open Access -
Frequency tuneable sub-15 fs pulses from a gas-filled hollow-core fiber pumped by a commercial Yb laser
Sabbah, M., Belli, F., Brahms, C., Yu, F., Knight, J. & Travers, J. C., 23 Sept 2022, 2022 Conference on Lasers and Electro-Optics (CLEO): Applications and Technology, A and T 2022. IEEE, ATh4C.3. (Conference on Lasers and Electro-Optics).Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding
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Photodarkening mechanisms of Pr3+ singly doped and Pr3+/Ce3+ co-doped silicate glasses and fibers
Sun, Y., Ma, J., Shao, C., Wang, X., Yu, F., Liao, M., Hu, L. & Knight, J., 31 May 2022, In: Journal of the American Ceramic Society. 105, 5, p. 3291-3302Research output: Contribution to journal › Article › peer-review
2 Citations (SciVal) -
Sub parts-per-billion detection of ethane in a 30-meters long mid-IR Antiresonant Hollow-Core Fiber
Jaworski, P., Krzempek, K., Kozioł, P., Wu, D., Yu, F., Bojęś, P., Dudzik, G., Liao, M., Knight, J. & Abramski, K., 31 Mar 2022, In: Optics and Laser Technology. 147, 107638.Research output: Contribution to journal › Article › peer-review
Open Access9 Citations (SciVal)
Datasets
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Dataset 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, 17 Sept 2018
DOI: 10.15125/BATH-00554
Dataset
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Dataset for 'Mid-infrared 1 Watt continuous wave hollow-core fiber gas laser source'
Yu, F. (Creator), Xu, M. (Project Member) & Knight, J. (Project Leader), University of Bath, 2017
DOI: 10.15125/BATH-00392
Dataset
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Low-loss single-mode performance in anti resonant hollow-core fibers
Yu, F. (Creator), Knight, J. (Project Leader) & Xu, M. (Project Member), University of Bath, 2016
DOI: 10.15125/BATH-00189
Dataset
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Dataset for Spectral Broadening for Pulse Compression Using Argon Filled Negative Curvature Fiber
Harvey, C. (Creator), Yu, F. (Researcher), Knight, J. (Supervisor), Wadsworth, W. (Supervisor) & Almeida, P. (Supervisor), University of Bath, 5 Jun 2016
DOI: 10.15125/BATH-00171
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