Prof. William J. Wadsworth Profile

Prof. William J. Wadsworth

at Univ of Bath

SPIE Involvement:

Author

Publications (26)

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 | 5 October 2023 Poster + Paper

Polarization effects in 22-ring tapered hollow-core optical fibers for far-UV instrumentation

Thomas Livingston, Dmitry Vorobiev, Destry DeWitt, Brian Fleming, Emily Farr, Bartlomiej Winter, Kerrianne Harrington, Tim Birks, William Wadsworth

Proceedings Volume 12678, 1267817 (2023) https://doi.org/10.1117/12.2676059

KEYWORDS: Polarization, Polarizers, Polarized light, Capillaries, Cameras, Incident light, Structured optical fibers, High dynamic range imaging, Optical fibers, Signal intensity

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Proceedings Article | 5 October 2023 Presentation + Paper

Transmission and bend loss in far ultraviolet hollow-core fibers for compact fiber-fed, multi-object spectrographs and reflectometers

Destry Dewitt, Dmitry Vorobiev, Thomas Livingston, Brian Fleming, Emily Farr, Tim Birks, Bartlomiej Winter, Kerrianne Harrington, William Wadsworth

Proceedings Volume 12678, 126780U (2023) https://doi.org/10.1117/12.2677602

KEYWORDS: Vacuum chambers, Far ultraviolet, Nitrogen, Spectrographs, Lamps, Relative humidity, Fiber optics, Equipment, Reflectometry, Spectroscopy

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Proceedings Article | 9 March 2022 Poster

Smart feedback for reliable scanning: developing the OpenFlexure Microscope for medical imaging

Joseph Knapper, Julian Stirling, Daniel Rosen, Joram Mduda, Samuel McDermott, Catherine Mkindi, William Wadsworth, Richard Bowman

Proceedings Volume PC12017, PC120170Z (2022) https://doi.org/10.1117/12.2628336

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Proceedings Article | 20 August 2021 Poster + Paper

Far-ultraviolet optical fibers for instrumentation in the sub-200 nm regime

Wesley Gilliam, Brian Fleming, Dmitry Vorobiev, Bartlomiej Winter, William Wadsworth, Tim Birks

Proceedings Volume 11819, 118190L (2021) https://doi.org/10.1117/12.2594196

KEYWORDS: Optical fibers, Ultraviolet radiation, Signal attenuation, Fiber optics, Spectroscopy, Spectrographs, Silica, Physics, Light sources, Capillaries

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Proceedings Article | 24 April 2017 Presentation

Brillouin endoscope, design and optimization strategies (Conference Presentation)

Yuchen Xiang, ChengZe Song, William Wadsworth, Carl Paterson, Peter Török, Irina Kabakova

Proceedings Volume 10067, 100670O (2017) https://doi.org/10.1117/12.2252263

KEYWORDS: Tissue optics, Light scattering, Endoscopes, Tissues, Scattering, In vivo imaging, Acoustics, Live cell imaging, Imaging spectroscopy, System integration

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Proceedings Article | 28 February 2014 Paper

High-performance fiber parametric oscillator for coherent Raman microscopy

Erin Lamb, Simon Lefrancois, Minbiao Ji, William Wadsworth, X. Sunney Xie, Frank Wise

Proceedings Volume 8948, 894815 (2014) https://doi.org/10.1117/12.2037328

KEYWORDS: Optical parametric oscillators, Microscopy, Picosecond phenomena, Oscillators, Optical filters, Raman spectroscopy, Dispersion, Fiber lasers, CARS tomography, Solid state physics

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Proceedings Article | 29 March 2013 Paper

NV center emission in a substrate free low index environment

F. Inam, M. D. W. Grogan, M. Rollings, T. Gaebel, S. Castelletto, J. Say, C. Bradac, T. Birks, W. Wadsworth, J. Rabeau, M. Steel

Proceedings Volume 8635, 86350F (2013) https://doi.org/10.1117/12.2003493

KEYWORDS: Diamond, Quantum efficiency, Pollution control, Crystals, Glasses, Silica, Optical spheres, Single photon, Finite-difference time-domain method, Luminescence

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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 | 9 February 2012 Paper

Towards a tunable fiber source for coherent Raman imaging

Simon Lefrancois, Dan Fu, Gary Holtom, Lingjie Kong, William Wadsworth, Patrick Schneider, Robert Herda, Armin Zach, X. Sunney Xie, Frank Wise

Proceedings Volume 8226, 822620 (2012) https://doi.org/10.1117/12.920187

KEYWORDS: Chromium, Picosecond phenomena, Fiber lasers, Microscopy, Dispersion, Coherence imaging, Raman spectroscopy, Four wave mixing, Fiber amplifiers, Tissues

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Proceedings Article | 3 February 2012 Paper

Power-scalable tunable UV, visible, and NIR generation from an ultrafast fiber OPA based on four wave mixing in PCF

Michael Yarrow, William Wadsworth, Laure Lavoute, John Clowes, Anatoly Grudinin

Proceedings Volume 8240, 824005 (2012) https://doi.org/10.1117/12.908506

KEYWORDS: Second-harmonic generation, Visible radiation, Crystals, Ultrafast phenomena, Near infrared, Ultraviolet radiation, Oscillators, Frequency conversion, Four wave mixing, Phase matching

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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 | 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 | 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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SPIE Journal Paper | 1 March 2006

Liquid-crystal-based in-fiber tunable spectral structures

Zeev Zalevsky, Feng Luan, William Wadsworth, Sergio Saval, Timothy Birks

OE, Vol. 45, Issue 03, 035005, (March 2006) https://doi.org/10.1117/12.10.1117/1.2181847

KEYWORDS: Capillaries, Liquid crystals, Electrodes, Refractive index, Fabry–Perot interferometers, Tunable filters, Optical engineering, Optical fibers, Molecules, Fiber Bragg gratings

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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 | 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 | 19 November 2003 Paper

Investigations of the influence of a tapered fiber on spectrum of femtosecond pulses train

Sergei Bagayev, S. Chepurov, Vladimir Denisov, V. Klementyev, D. Kolker, Igor Korel, S. Kuznetsov, Yu. Matyugin, V. Pivtsov, V. Zakharyash, Timothy Birks, William Wadsworth, Philip Russell

Proceedings Volume 4829, (2003) https://doi.org/10.1117/12.525267

KEYWORDS: Femtosecond phenomena, Ultrafast phenomena, Modulation, Phase shift keying, Optical clocks, Precision measurement, Sapphire lasers, Fiber lasers, Spectroscopy, Pulsed laser operation

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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 | 2 October 2003 Paper

Real-time ultrahigh-resolution OCT systems for in vivo imaging

Stephane Bourquin, Aaron Aguirre, Ingmar Hartl, Pei-Lin Hsiung, Tony Ko, Tim Birks, William Wadsworth, Udo Buenting, Daniel Kopf, James Fujimoto

Proceedings Volume 5140, (2003) https://doi.org/10.1117/12.501006

KEYWORDS: Optical coherence tomography, In vivo imaging, Image resolution, Imaging systems, Femtosecond phenomena, Neodymium glass lasers, Light sources, Single mode fibers, Skin, Real time imaging

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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 | 8 July 2003 Paper

Portable broadband light sources using a femtosecond Nd:Glass laser and nonlinear fiber for ultrahigh-resolution OCT imaging

Stephane Bourquin, Ingmar Hartl, Aaron Aguirre, Pei-Lin Hsiung, Tony Ko, Timothy Birks, William Wadsworth, Uwe Bünting, Daniel Kopf, James Fujimoto

Proceedings Volume 4956, (2003) https://doi.org/10.1117/12.479035

KEYWORDS: Optical coherence tomography, Light sources, Image resolution, Femtosecond phenomena, Neodymium glass lasers, Fiber lasers, Femtosecond fiber lasers, Single mode fibers, Imaging systems, Diodes

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Proceedings Article | 29 July 2002 Paper

Investigation of Ti:S femtosecond laser radiation spectrum broadened in tapered fiber

Sergei Bagayev, S. Chepurov, Vladimir Denisov, V. Klementyev, D. Kolker, Igor Korel, S. Kuznetsov, Yu. Matyugin, V. Pivtsov, V. Zakharyash, Timothy Birks, William Wadsworth, Philip Russell

Proceedings Volume 4900, (2002) https://doi.org/10.1117/12.484549

KEYWORDS: Femtosecond phenomena, Dispersion, Raman spectroscopy, Fiber lasers, Optical fibers, Fiber couplers, Physics, Spectroscopy, Physical research, Pulsed laser operation

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Proceedings Article | 29 July 2002 Paper

Femtosecond optical clock with the use of a frequency comb

Sergei Bagayev, S. Chepurov, Vladimir Denisov, Alexander Dmitriyev, A. Dychkov, V. Klementyev, D. Kolker, Igor Korel, S. Kuznetsov, Yu. Matyugin, M. Okhapkin, V. Pivtsov, M. Skvortsov, V. Zakharyash, Timothy Birks, William Wadsworth, Philip Russell

Proceedings Volume 4900, (2002) https://doi.org/10.1117/12.484541

KEYWORDS: Optical fibers, Femtosecond phenomena, Optical clocks, Semiconductor lasers, Nonlinear crystals, Terahertz radiation, Nd:YAG lasers, Solids, Frequency combs, Silicon

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Proceedings Article | 1 April 2002 Paper

Femtosecond optical clock

Sergei Bagayev, Alexander Dmitriyev, S. Chepurov, A. Dychkov, V. Klementyev, D. Kolker, S. Kuznetsov, Yu. Matyugin, M. Okhapkin, V. Pivtsov, M. Skvortsov, V. Zakharyash, Timothy Birks, William Wadsworth, Philip Russell, Alexei Zheltikov, Valentin Beloglazov

Proceedings Volume 4750, (2002) https://doi.org/10.1117/12.464464

KEYWORDS: Semiconductor lasers, Optical clocks, Femtosecond phenomena, Nd:YAG lasers, Silicon, Diodes, Information operations, Quantum information, Atomic optics, Optical testing

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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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