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 PhD

Low loss hollow core fibres
Generating new wavelengths using hollow core fibres

Fingerprint Fingerprint is based on mining the text of the person's scientific documents to create an index of weighted terms, which defines the key subjects of each individual researcher.

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Projects 2001 2019

Research Output 1997 2018

Continuous-Wave Mid-Infrared Gas Fiber Lasers

Xu, M., Yu, F., Hassan, M. R. & Knight, J. C. 1 May 2018 In : IEEE Journal of Selected Topics in Quantum Electronics. 24, 3, 8255800

Research output: Contribution to journalArticle

Open Access
Continuous wave lasers
continuous radiation

Improving SERS diagnostics with hollow-core negative curvature fibers

Knight, J. & Yerolatsitis, S. 1 Jan 2018 In : Spectroscopy . 33, 1, p. 24-29 6 p.

Research output: Contribution to journalReview article

Abnormal Erythrocytes
Edema Disease of Swine
Experimental Liver Cirrhoses
Methacholine Compounds

Semi-random multicore fibre design for adaptive multiphoton endoscopy

Kim, Y., Warren, S., Favero, F., Stone, J., Clegg, J., Neil, M., Paterson, C., Knight, J., French, P. & Dunsby, C. 5 Feb 2018 In : Optics Express. 26, 3, p. 3361-3673 13 p., 314725

Research output: Contribution to journalArticle

Open Access
Imaging techniques

Single-mode solarization-free hollow-core fiber for ultraviolet pulse delivery

Yu, F., Cann, M., Brunton, A., Wadsworth, W. & Knight, J. 13 Apr 2018 In : Optics Express. 26, 8, p. 10879-10887 9 p.

Research output: Contribution to journalArticle

Open Access
silicon dioxide
3 Citations

Continuous-wave 3.1 μm gas fiber laser with 0.47 W output power

Xu, M., Yu, F., Hassan, M. R. A. & Knight, J. C. 2017 CLEO: Science and Innovations, CLEO SI, 2017: Part F41-CLEO SI, 2017. OSA Publishing

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Gas lasers
Erbium doped fiber amplifiers
Spontaneous emission
Fiber lasers