Prof. Jonathan C. Knight Profile

Prof. Jonathan C. Knight

Pro-Vice-Chancellor (Research) at Univ of Bath

SPIE Involvement:

Conference Program Committee | Author

Publications (30)

Proceedings Article | 9 March 2024 Presentation

Reversible photodarkening in UV-guiding hollow-core optical fibres

Robbie Mears, Kerrianne Harrington, Jonathan Knight, William Wadsworth, James Stone, Tim Birks

Proceedings Volume PC12882, PC128820K (2024) https://doi.org/10.1117/12.3001758

KEYWORDS: Optical fibers, Ultraviolet radiation, Silica, Signal attenuation, Rayleigh scattering, Light absorption, Xenon, Tunable filters, Solid state physics, Photons

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Proceedings Article | 14 March 2018 Presentation

A multifunctional endoscope for imaging, fluid delivery and fluid extraction (Conference Presentation)

James Stone, Tushar Choudhary, Helen Parker, Bethany Mills, Adam Marshall, Debaditya Choudhury, Michael Tanner, Harry Wood, Kerrianne Harrington, Jonathan Knight, Tim Birks, Kevin Dhaliwal, Mark Bradley

Proceedings Volume 10488, 104880V (2018) https://doi.org/10.1117/12.2289555

KEYWORDS: Endoscopes, Microfluidic imaging, Microfluidics, Endoscopy, Optical fibers, Telecommunications, Pathogens, Target detection, Lung, Tissues

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Proceedings Article | 12 May 2016 Paper

Fugitive methane leak detection using mid-infrared hollow-core photonic crystal fiber containing ultrafast laser drilled side-holes

Jason Karp, William Challener, Matthias Kasten, Niloy Choudhury, Sabarni Palit, Gary Pickrell, Daniel Homa, Adam Floyd, Yujie Cheng, Fei Yu, Jonathan Knight

Proceedings Volume 9852, 985210 (2016) https://doi.org/10.1117/12.2229084

KEYWORDS: Methane, Mid-IR, Laser drilling, Photonic crystal fibers, Ultrafast lasers, Diffusion, Fiber lasers, Absorption, Sensors, Pulsed laser operation

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Proceedings Article | 28 September 2015 Paper

Negative curvature fibres: exploiting the potential for novel optical sensors

C. Novo, A. Urich, D. Choudhury, R. Carter, D. Hand, R. Thomson, F. Yu, J. Knight, S. Brooks, S. Mcculloch, J. Shephard

Proceedings Volume 9634, 963455 (2015) https://doi.org/10.1117/12.2186755

KEYWORDS: Silica, Mid-IR, Structured optical fibers, Cladding, Photonics, Absorption, Femtosecond phenomena, Sensors, Optical sensors, Solids

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Proceedings Article | 1 May 2014 Paper

High-power femtosecond fiber lasers based on self-similar pulse evolution

Hui Liu, William Renninger, Bai Nie, Marcos Dantus, Fei Yu, Jonathan Knight, Andy Chong, Frank Wise

Proceedings Volume 9136, 91360W (2014) https://doi.org/10.1117/12.2058563

KEYWORDS: Fiber lasers, Dispersion, Pulsed laser operation, Solitons, Optical filters, Femtosecond fiber lasers, Oscillators, Picosecond phenomena, Optical simulations, Femtosecond phenomena

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Proceedings Article | 20 March 2013 Paper

Flexible delivery of Er:YAG radiation at 2.94 µm with novel hollow-core silica glass fibres: demonstration of tissue ablation

Artur Urich, Robert R. Maier, Jonathan Knight, Fei Yu, Duncan Hand, Jonathan Shephard

Proceedings Volume 8576, 857608 (2013) https://doi.org/10.1117/12.2002430

KEYWORDS: Tissues, Er:YAG lasers, Silica, Signal attenuation, Laser ablation, Neodymium, Photonics, Glasses, Laser development, Structured optical fibers

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Proceedings Article | 29 November 2012 Paper

Evanescent coupling assisted four-wave mixing in a silicon-on-insulator directional coupler

Wei Ding, Owain Staines, Gareth Hobbs, Andrey Gorbach, Charles de Nobriga, William Wadsworth, Jonathan Knight, Dmitry Skryabin, Michael Strain, Marc Sorel, Richard De La Rue

Proceedings Volume 8554, 855411 (2012) https://doi.org/10.1117/12.2000638

KEYWORDS: Waveguides, Dispersion, Silicon, Frequency conversion, Four wave mixing, Photons, Modulation, Optical fibers, Directional couplers, Phase shift keying

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Proceedings Article | 30 January 2012 Paper

Fabrication of silica hollow core photonic crystal fibres for Er:YAG surgical applications

Artur Urich, Robert R. Maier, Jonathan Knight, Brian Mangan, Steven Renshaw, Duncan Hand, Jonathan Shephard

Proceedings Volume 8218, 821805 (2012) https://doi.org/10.1117/12.906171

KEYWORDS: Silica, Er:YAG lasers, Photonic crystal fibers, Surgery, Signal attenuation, Pulsed laser operation, Waveguides, Mid-IR, Endoscopy, Absorption

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Proceedings Article | 14 October 2010 Paper

Coupling efficiency and transmission through hollow-core photonic bandgap fibers

J. Estudillo-Ayala, B. Mangan, W. Wadsworth, J. Knight

Proceedings Volume 7839, 78391J (2010) https://doi.org/10.1117/12.867177

KEYWORDS: Optical fibers, Signal attenuation, Light sources, Fiber lasers, Physics, Picosecond phenomena, Cladding, Optical damage, Photomicroscopy, Lamps

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Proceedings Article | 9 September 2010 Paper

Distributed gas sensor based on a photonic bandgap fiber cell with laser-drilled, lateral microchannels

Hartmut Lehmann, Hartmut Bartelt, Reinhardt Willsch, Rodrigo Amezcua-Correa, Jonathan Knight

Proceedings Volume 7653, 76532W (2010) https://doi.org/10.1117/12.866440

KEYWORDS: Sensors, Gas sensors, Fiber lasers, Cladding, Fiber optics sensors, Signal attenuation, Methane, Single mode fibers, Laser drilling, Spectroscopy

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Proceedings Article | 5 October 2009 Paper

Gas sensing with suspended core fibres and hollow core band gap fibres: a comparative study

Hartmut Lehmann, Jens Kobelke, Kay Schuster, Reinhardt Willsch, Hartmut Bartelt, Rodrigo Amezcua-Correa, Jonathan Knight

Proceedings Volume 7503, 75035C (2009) https://doi.org/10.1117/12.835285

KEYWORDS: Optical fibers, Sensors, Absorption, Gases, Micro optical fluidics, Near infrared, Combustion, Liquids, Silica, Cladding

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Proceedings Article | 5 October 2009 Paper

Sensing characteristics of hollow-core photonic crystal fibre modal interferometers

S. Aref, R. Amezcua-Correa, J. Carvalho, O. Frazão, P. Caldas, J. Santos, F. Araújo, H. Latifi, F. Farahi, L. Ferreira, J. Knight

Proceedings Volume 7503, 750339 (2009) https://doi.org/10.1117/12.834485

KEYWORDS: Interferometers, Photonic crystal fibers, Interferometry, Sensors, Head, Structured optical fibers, Fusion splicing, Structural sensing, Fermium, Frequency modulation

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Proceedings Article | 20 May 2009 Paper

Characterization of modes excited in a nonlinear photonic crystal fibre using low coherence interferometry

P. Nandi, W. Wadsworth, T. Birks, J. Knight

Proceedings Volume 7357, 73570B (2009) https://doi.org/10.1117/12.820710

KEYWORDS: Dispersion, Mirrors, Interferometry, Photodetectors, Photonic crystal fibers, Nonlinear crystals, CCD cameras, Velocity measurements, Interferometers, Digital photography

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Proceedings Article | 28 February 2009 Paper

Ultrafast optical parametric oscillators for spectroscopy

Derryck Reid, Łukasz Kornaszewski, T. Müller, Nicolas Gayraud, William MacPherson, Duncan Hand, James Stone, Jonathan Knight

Proceedings Volume 7193, 719325 (2009) https://doi.org/10.1117/12.812262

KEYWORDS: Optical parametric oscillators, Spectroscopy, Femtosecond phenomena, Mid-IR, Methane, Absorption, FT-IR spectroscopy, Mirrors, Picosecond phenomena, Crystals

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Proceedings Article | 19 February 2009 Paper

Tunable high-energy femtosecond soliton fiber laser based on hollow-core photonic bandgap fiber

Pascal Dupriez, Frédéric Gérôme, Jonathan Knight, John Clowes, William Wadsworth

Proceedings Volume 7195, 719511 (2009) https://doi.org/10.1117/12.807209

KEYWORDS: Solitons, Femtosecond phenomena, Fiber lasers, Picosecond phenomena, Laser energy, Pulsed laser operation, Second-harmonic generation, Fiber amplifiers, Dispersion, Polarization

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Proceedings Article | 11 November 2008 Paper

Better photonic crystal fibres

J. Knight

Proceedings Volume 7134, 713402 (2008) https://doi.org/10.1117/12.802753

KEYWORDS: Dispersion, Photonic crystal fibers, Solitons, Signal attenuation, Wave propagation, Cladding, Optical fibers, Waveguides, Nonlinear optics, Photonic crystals

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Proceedings Article | 21 April 2008 Paper

Control of surface modes in hollow-core bandgap fibers

Rodrigo Amezcua-Correa, Sergio Leon-Saval, Frédéric Gérôme, Tim Birks, Jonathan Knight

Proceedings Volume 6990, 699004 (2008) https://doi.org/10.1117/12.780822

KEYWORDS: Optical fibers, Dispersion, Cladding, Photonics, Signal attenuation, Ultrafast phenomena, Silica, Glasses, Interfaces, Fabrication

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Proceedings Article | 17 April 2008 Paper

Slow light in optical fiber using stimulated Brillouin scattering

Valeri Kovalev, Robert Harrison, Jonathan Knight, Nadezha Kotova

Proceedings Volume 7024, 702415 (2008) https://doi.org/10.1117/12.801761

KEYWORDS: Optical fibers, Slow light, Scattering, Light scattering, Telecommunications, Refractive index, Waveguides, Acoustics, Signal processing, Phase velocity

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Proceedings Article | 7 February 2006 Paper

Delivery of nanosecond pulses through hollow core photonic crystal fibres and the associated damage limitations

J.D. Shephard, J.D.C. Jones, D.P. Hand, J.C. Knight

Proceedings Volume 5991, 59911Y (2006) https://doi.org/10.1117/12.637674

KEYWORDS: Cladding, Laser damage threshold, Silica, Pulsed laser operation, Photonic crystal fibers, Photonic crystals, Micromachining, Nd:YAG lasers, Single mode fibers, Structured optical fibers

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Proceedings Article | 23 May 2005 Paper

Photonic sensing based on modulation of propagation properties of Photonic Crystal Fibers

John Rothwell, Donal Flavin, William MacPherson, Julian Jones, Jonathan Knight, Philip Russell

Proceedings Volume 5855, (2005) https://doi.org/10.1117/12.623499

KEYWORDS: Dispersion, Temperature metrology, Modulation, Photonic crystal fibers, Single mode fibers, Photodetectors, Interferometry, Waveguides, Interferometers, Biomedical optics

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Proceedings Article | 30 March 2005 Paper

Development of a double-clad photonic-crystal-fiber-based scanning microscope

Jing Yong Ye, Mon Thiri Myaing, Thommey Thomas, Istvan Majoros, Alina Koltyar, James Baker, William Wadsworth, Geraud Bouwmans, Jonathan Knight, Philip Russell, Theodore Norris

Proceedings Volume 5700, (2005) https://doi.org/10.1117/12.589344

KEYWORDS: Microscopes, Luminescence, Confocal microscopy, GRIN lenses, Single mode fibers, Fiber lasers, Cladding, Laser scanners, Objectives, Dendrimers

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Proceedings Article | 21 March 2005 Paper

Visualizing nonlinear dynamics in optical waveguides

Anatoly Efimov, Antoinette Taylor, Fiorenzo Omenetto, Jonathan Knight, A. Yulin, F. Biancalana, V Kumar, N. Joly, P. Russell, D. Skryabin

Proceedings Volume 5714, (2005) https://doi.org/10.1117/12.602147

KEYWORDS: Solitons, Optical fibers, Dispersion, Raman spectroscopy, Waveguides, Wave propagation, Nonlinear dynamics, Visualization, Nonlinear optics, Silica

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Proceedings Article | 8 September 2004 Paper

Birefringent photonic crystal fiber with square lattice

Marcin Franczyk, Jonathan Knight, Timothy Birks, Philip Russell, Albert Ferrando

Proceedings Volume 5576, (2004) https://doi.org/10.1117/12.581512

KEYWORDS: Optical fibers, Polarization, Birefringence, Photonic crystal fibers, Solids, Silica, Capillaries, Near field, Near field optics, Refractive index

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Proceedings Article | 10 June 2004 Paper

Two-photon fluorescence biosensing with conventional and photonic crystal fibers

Mon Thiri Myaing, Jing Yong Ye, Theodore Norris, Thommey Thomas, James Baker, William Wadsworth, Geraud Bouwmans, Jonathan Knight, Philip Russell

Proceedings Volume 5317, (2004) https://doi.org/10.1117/12.529394

KEYWORDS: Luminescence, Tumors, In vivo imaging, Dendrimers, Single mode fibers, Photonic crystal fibers, Biosensing, Optical fibers, Tissues, Flow cytometry

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Proceedings Article | 2 October 2003 Paper

Ultrahigh-resolution optical coherence tomography in the visible and 1300-nm wavelength region

Boris Povazay, Kostadinka Bizheva, Angelika Unterhuber, Boris Hermann, Harald Sattmann, William Wadsworth, Jonathan Knight, Philip Russell, Michael Mei, Ronald Holzwarth, Thomas Hoelzenbein, Adolf Fercher, Wolfgang Drexler

Proceedings Volume 5140, (2003) https://doi.org/10.1117/12.500945

KEYWORDS: Optical coherence tomography, Light sources, Tissues, Biopsy, Image resolution, Femtosecond phenomena, Imaging systems, Scattering, Erbium lasers, Fiber lasers

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Proceedings Article | 14 August 2003 Paper

Recent progress in photonic crystal fibers

William Wadsworth, Jonathan Knight, T. Birks, Philip Russell

Proceedings Volume 5246, (2003) https://doi.org/10.1117/12.516536

KEYWORDS: Cladding, Dispersion, Solids, Photonic crystal fibers, Glasses, Optical fibers, Structured optical fibers, Waveguides, Light wave propagation, Fiber lasers

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Proceedings Article | 30 July 2001 Paper

Seeing things in a hole new light: photonic crystal fibers

Timothy Birks, Jonathan Knight, Brian Mangan, Philip Russell

Proceedings Volume 4532, (2001) https://doi.org/10.1117/12.436013

KEYWORDS: Cladding, Waveguides, Silica, Wave propagation, Step index fibers, Photonic crystal fibers, Optical fibers, Solids, Light wave propagation, Structured optical fibers

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Proceedings Article | 3 May 2001 Paper

Frequency control of a chirped-mirror-dispersion-controlled mode-locked Ti:Al2O3 laser for comparison between microwave and optical frequencies

Kazuhiko Sugiyama, Atsushi Onae, Takeshi Ikegami, Sergey Slyusarev, Feng-Lei Hong, Kaoru Minoshima, Hirokazu Matsumoto, Jonathan Knight, William Wadsworth, Philip Russell

Proceedings Volume 4269, (2001) https://doi.org/10.1117/12.424458

KEYWORDS: Mode locking, Laser stabilization, Fiber lasers, Microwave radiation, Crystals, Nd:YAG lasers, Frequency combs, Cesium, Iodine cells, Mirrors

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Proceedings Article | 19 July 1999 Paper

Photonic crystal fibers, waveguides, and resonators

Philip Russell, J. Knight, Timothy Birks

Proceedings Volume 3749, (1999) https://doi.org/10.1117/12.354899

KEYWORDS: Photonic crystals, Photonic crystal fibers, Waveguides, Dielectrics, Near field optics, Cladding, Dispersion, Resonators, Refractive index, Crystal optics

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SPIE Journal Paper | 1 September 1994

Measurement of capillary core size and taper using whispering-gallery-mode laser emission

Jonathan Knight, H. Steve Driver, Gerald Robertson

OE, Vol. 33, Issue 09, (September 1994) https://doi.org/10.1117/12.10.1117/12.175670

KEYWORDS: Capillaries, Refractive index, Fiber lasers, Particles, Cladding, Fiber characterization, Manufacturing, Composites, Scattering, Nondestructive evaluation

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Showing 5 of 30 publications

Conference Committee Involvement (17)

Specialty Optical Fibres VIII

9 April 2024 | Strasbourg, France

Specialty Optical Fibres

24 April 2023 | Prague, Czech Republic

Micro-Structured and Specialty Optical Fibres VII

6 April 2022 | Strasbourg, France

Micro-structured and Specialty Optical Fibres VII

19 April 2021 | Online Only, Czech Republic

Micro-Structured and Specialty Optical Fibres VI

6 April 2020 | Online Only, France

Micro-structured and Specialty Optical Fibres

3 April 2019 | Prague, Czech Republic

Micro-Structured and Specialty Optical Fibres

25 April 2018 | Strasbourg, France

Micro-structured and Specialty Optical Fibres

26 April 2017 | Prague, Czech Republic

Micro-Structured and Specialty Optical Fibres

4 April 2016 | Brussels, Belgium

Micro-structured and Specialty Optical Fibres

15 April 2015 | Prague, Czech Republic

Micro-Structured and Specialty Optical Fibres

14 April 2014 | Brussels, Belgium

Micro-structured and Specialty Optical Fibres II

15 April 2013 | Prague, Czech Republic

Micro-structured and Specialty Optical Fibres

17 April 2012 | Brussels, Belgium

Photonic Crystal Fibres

19 April 2011 | Prague, Czech Republic

Photonic Crystal Fibres

14 April 2010 | Brussels, Belgium

Photonic Crystal Fibres

22 April 2009 | Prague, Czech Republic

Photonic Crystal Fibres

9 April 2008 | Strasbourg, France

Showing 5 of 17 Conference Committees

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