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.

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Projects 2001 2019

Research Output 1997 2018

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

Fibers
Fluorescence
Endoscopy
Imaging techniques

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
Acetylene
Fiber lasers

Experimental measurement of supercontinuum coherence in highly nonlinear soft-glass photonic crystal fibers

Zhang, Y., Kainerstorfer, J., Knight, J. C. & Omenetto, F. G. 7 Aug 2017 In : Optics Express. 25, 16, p. 18842-18852 11 p.

Research output: Contribution to journalArticle

Photonic crystal fibers
Solitons
Glass fibers
Association reactions
Degradation

Gas filled hollow core mid-IR fibre lasers

Wadsworth, W. J., Love, A. L., Yu, F., Hassan, M. R. A., Xu, M. & Knight, J. C. 2017 The European Conference on Lasers and Electro-Optics, CLEO_Europe 2017: Part F82. OSA Publishing

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

Fiber lasers
Gases

Low loss anti-resonant hollow-core fibers and applications

Yu, F. & Knight, J. C. 1 Sep 2017 ICTON 2017 - 19th International Conference on Transparent Optical Networks. IEEE, 8024815

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

Fibers
Gases
Gas lasers
Optical frequency conversion
Fiber lasers