Prof. W. Andrew Clarkson Profile

Prof. W. Andrew Clarkson

Chair in Optoelectronics at Optoelectronics Research Ctr.

SPIE Involvement:

Conference Chair | Editor | Author

Publications (40)

Proceedings Article | 12 March 2024 Poster + Paper

Determining the relative impact of quantum efficiency and core propagation loss on efficient power scaling of thulium-doped silica fibre lasers

Martin Paul Buckthorpe, Richard Švejkar, William Andrew Clarkson

Proceedings Volume 12864, 128640W (2024) https://doi.org/10.1117/12.3002641

KEYWORDS: Quantum efficiency, Thulium, Quantum measurement, Fiber lasers, Thermal effects, Silica, Doping, Quantum experiments, Fiber Bragg gratings, Structured optical fibers

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Proceedings Article | 9 March 2023 Presentation

Generation of actively Q-switched pulses with radial polarization using a laser-written S-waveplate in a Ho:YAG laser

Matthew Barber, Peter Shardlow, Yuhao Lei, Peter Kazansky, W. Clarkson

Proceedings Volume PC12399, PC1239907 (2023) https://doi.org/10.1117/12.2651469

KEYWORDS: Polarization, Q switched lasers, Wave plates, Pulsed laser operation, Laser processing, Ultrafast lasers, Silica, Q switching, Output couplers, Mirrors

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Proceedings Article | 9 March 2023 Presentation

Double-pass amplification of a radially polarized beam up to 33.7 W using a Ho:YAG thin-slab architecture

Matthew Barber, Peter Shardlow, Callum Smith, W. Clarkson

Proceedings Volume PC12399, PC1239906 (2023) https://doi.org/10.1117/12.2651466

KEYWORDS: Phase shifts, Polarization, Amplifiers, Fiber lasers, Crystals, Birefringence, YAG lasers, Laser crystals, High power lasers

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Proceedings Article | 5 March 2021 Presentation

Welcome and Introduction to SPIE Conference 11664

W. Andrew Clarkson, Ramesh Shori

Proceedings Volume 11664, 1166402 (2021) https://doi.org/10.1117/12.2592412

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Proceedings Article | 1 April 2020 Presentation

Cladding shaping of optical fiber preforms via CO2 laser machining (Conference Presentation)

Peter Shardlow, Robert Standish, Martin Velazquez, Jayanta Sahu, Andy Clarkson

Proceedings Volume 11355, 113550A (2020) https://doi.org/10.1117/12.2556685

KEYWORDS: Cladding, Carbon dioxide lasers, Optical fibers, Surface finishing, Silica, Polishing, High power lasers, Ion lasers, Ions, Refractive index

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Proceedings Article | 11 March 2020 Presentation

47-W 1726-nm operation of a thulium fiber laser pumped in-band by an erbium-only fiber laser (Conference Presentation)

Mark Burns, Peter Shardlow, Pranabesh Barua, Thomas Jefferson-Brain, Jayanta Sahu, William Clarkson

Proceedings Volume 11260, 112600G (2020) https://doi.org/10.1117/12.2544933

KEYWORDS: Fiber lasers, YAG lasers, Absorption, Ytterbium, Polymers, Laser therapeutics, Laser development, High power lasers, Laser sources, Laser systems engineering

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Proceedings Article | 11 March 2020 Presentation

Cladding-pumped nested-ring Tm fiber laser with 131 W single-mode output at 1907 nm (Conference Presentation)

Matthew Barber, Peter Shardlow, Pranabesh Barua, Jayanta Sahu, Andy Clarkson

Proceedings Volume 11260, 112600F (2020) https://doi.org/10.1117/12.2544414

KEYWORDS: Thulium, Fiber lasers, Optical pumping, Photons, Glasses, Defense and security, Medicine, Materials processing

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Proceedings Article | 10 March 2020 Presentation

Control and stabilization of spatial mode quality in a radially polarized solid-state laser using machine learning (Conference Presentation)

Thomas Jefferson-Brain, Matthew Barber, Azaria Coupe, William Clarkson, Peter Shardlow

Proceedings Volume 11259, 112590F (2020) https://doi.org/10.1117/12.2551145

KEYWORDS: Solid state lasers, Machine learning, Laser processing, Laser cutting, Convolutional neural networks, Crystals, Reflectors, Output couplers, Thulium, Fiber lasers

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Proceedings Article | 30 December 2019 Paper

Intra-cavity semiconductor laser tuning using a frequency compensating acousto-optic tunable filter pair

Adam Gambell, Nikita Simakov, Miftar Ganija, Alexander Hemming, Jae M. Daniel, Peter Shardlow, W. Andrew Clarkson, Jon Ward, Peter Veitch, Jesper Munch, John Haub

Proceedings Volume 11200, 1120027 (2019) https://doi.org/10.1117/12.2542019

KEYWORDS: Semiconductor lasers, Acousto-optics, Tunable filters, Tunable lasers, Semiconductor optical amplifiers

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Proceedings Article | 13 March 2019 Presentation

Amplification of a radially polarized beam in a thermally-guiding fiber-rod amplifier (Conference Presentation)

Thomas Jefferson-Brain, Callum Smith, Mark Burns, Peter Shardlow, William Clarkson

Proceedings Volume 10896, 1089616 (2019) https://doi.org/10.1117/12.2510173

KEYWORDS: Optical amplifiers, Fiber amplifiers, High power fiber amplifiers, Fiber lasers, Laser optics, Thermal effects, Continuous wave operation, Crystals, Laser crystals, Optical fibers

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Proceedings Article | 13 March 2019 Presentation

High power 1726 nm operation of a thulium fiber laser pumped in-band by an erbium-only fiber laser (Conference Presentation)

Mark Burns, Peter Shardlow, Pranabesh Barua, Thomas Jefferson-Brain, Jayanta Sahu, William Clarkson

Proceedings Volume 10897, 108970O (2019) https://doi.org/10.1117/12.2510354

KEYWORDS: Fiber lasers, YAG lasers, Absorption, Ytterbium, Polymers, Laser therapeutics, Laser development, High power lasers, Laser sources, Laser systems engineering

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Proceedings Article | 13 March 2019 Presentation

Generation and amplification of a LG01 laser with a thermally-guiding fiber-rod (Conference Presentation)

Thomas Jefferson-Brain, Qiyao Liu, Peter Shardlow, William Clarkson

Proceedings Volume 10896, 108961A (2019) https://doi.org/10.1117/12.2511648

KEYWORDS: Neodymium lasers, High power fiber amplifiers, Optical amplifiers, Laser processing, High power lasers, Laser damage threshold, Fiber amplifiers, Optical pumping, Fiber coupled lasers, Diodes

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Proceedings Article | 14 March 2018 Presentation

Thermally guided ytterbium-doped fiber-rod laser (Conference Presentation)

Callum Smith, Thomas Jefferson-Brain, Nikita Simakov, Alexander Hemming, W. Andrew Clarkson

Proceedings Volume 10511, 105111I (2018) https://doi.org/10.1117/12.2288686

KEYWORDS: Fiber lasers, Bulk lasers, Waveguides, Solid state lasers, Laser systems engineering, Structured optical fibers, Nonlinear optics, Optical damage, Modes of laser operation, Silica

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Proceedings Article | 21 April 2017 Presentation

Radially-polarised beam amplification in an Yb:YAG thin-slab architecture (Conference Presentation)

Callum Smith, Stephen Beecher, Jacob Mackenzie, W. Andrew Clarkson

Proceedings Volume 10082, 1008204 (2017) https://doi.org/10.1117/12.2256298

KEYWORDS: Amplifiers, Birefringence, Capillaries, Solid state lasers, Optoelectronics, Laser applications, Current controlled current source

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Proceedings Article | 27 March 2017 Presentation + Paper

Effects of coating thickness on high power metal coated fibre lasers

Jae M. Daniel, Nikita Simakov, Alexander Hemming, W. Andrew Clarkson, John Haub

Proceedings Volume 10083, 100831Q (2017) https://doi.org/10.1117/12.2250256

KEYWORDS: Metals, Coating, Fiber lasers, Fiber coatings, Laser scattering, Scattering, High power lasers, Cladding, Optical fibers, High power fiber lasers

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Proceedings Article | 11 March 2016 Paper

Advances in CO2 laser fabrication for high power fibre laser devices

Keiron Boyd, Simon Rees, Nikita Simakov, Jae M. Daniel, Robert Swain, Eric Mies, Alexander Hemming, W. Clarkson, John Haub

Proceedings Volume 9728, 972838 (2016) https://doi.org/10.1117/12.2210884

KEYWORDS: Carbon dioxide lasers, Cladding, High power fiber lasers, Fabrication, Fiber lasers, Optical fibers, Laser ablation, Silica, Laser processing, Surface finishing

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Proceedings Article | 9 March 2016 Paper

Passively cooled 405 W ytterbium fibre laser utilising a novel metal coated active fibre

Jae Daniel, Nikita Simakov, Alexander Hemming, W. Andrew Clarkson, John Haub

Proceedings Volume 9728, 972808 (2016) https://doi.org/10.1117/12.2210887

KEYWORDS: Fiber lasers, Metals, Ytterbium, Fiber coatings, Laser development, Directed energy weapons, Structured optical fibers, Glasses, Cladding, Aluminum, Heatsinks, Coating, Temperature metrology, Resistance

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Proceedings Article | 9 March 2016 Paper

Wavelength agile holmium-doped fiber laser

N. Simakov, J. M. Daniel, J. Ward, W. Clarkson, A. Hemming, J. Haub

Proceedings Volume 9728, 97280Q (2016) https://doi.org/10.1117/12.2210880

KEYWORDS: Mid-IR, Pulsed laser operation, Reflectivity, Acousto-optics, Tunable lasers, Diffraction gratings, Mirrors, Polarization

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Proceedings Article | 7 July 2015 Paper

High resolution Fourier domain Optical Coherence Tomography at 2 microns for painted objects

H. Liang, C. S. Cheung, J. M. Daniel, M. Tokurakawa, W. A. Clarkson, M. Spring

Proceedings Volume 9527, 952705 (2015) https://doi.org/10.1117/12.2185071

KEYWORDS: Optical coherence tomography, Scattering, Supercontinuum sources, Signal to noise ratio, Glasses, Imaging systems, Reflectivity, Interference (communication), Objectives, Optical resolution

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Proceedings Article | 4 March 2015 Paper

A double clad ytterbium fibre laser operating at 400°C

Jae M. O. Daniel, Nikita Simakov, Alexander Hemming, W. Andrew Clarkson, John Haub

Proceedings Volume 9344, 934414 (2015) https://doi.org/10.1117/12.2078192

KEYWORDS: Fiber lasers, Temperature metrology, Cladding, Ytterbium, Laser damage threshold, Polymers, Structured optical fibers, Glasses, Silica, Optical fibers

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Proceedings Article | 30 May 2013 Paper

Long wavelength optical coherence tomography for painted objects

C. S. Cheung, M. Tokurakawa, J. M. Daniel, W. Clarkson, H. Liang

Proceedings Volume 8790, 87900J (2013) https://doi.org/10.1117/12.2021700

KEYWORDS: Optical coherence tomography, Scattering, Glasses, Transparency, Absorption, Opacity, Tissues, Fiber couplers, Microscopes, Michelson interferometers

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Proceedings Article | 19 November 2012 Paper

Emerging Optical Fibre Technologies with Potential Defence Applications

Wei Loh, Dan Hewak, Marco Petrovich, John Hayes, Will Stewart, Andy Clarkson

Proceedings Volume 8542, 85421F (2012) https://doi.org/10.1117/12.978994

KEYWORDS: Optical fibers, Glasses, Cladding, Chalcogenide glass, Absorption, Infrared radiation, Chalcogenides, Samarium, Germanium, Structured optical fibers

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Proceedings Article | 19 May 2010 Paper

Efficient fiber-laser pumped Ho:LuLiF4 laser

J. Kim, J. Mackenzie, Daniela Parisi, Stefano Veronesi, Mauro Tonelli, W. Clarkson

Proceedings Volume 7721, 77210V (2010) https://doi.org/10.1117/12.853806

KEYWORDS: Crystals, Fiber lasers, Absorption, Mirrors, Laser crystals, Thulium, Holmium, Output couplers, Laser resonators, Resonators

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Proceedings Article | 17 February 2010 Paper

Two-micron cryogenically-cooled solid-state lasers: recent progress and future prospects

J. Mackenzie, J. Kim, L. Pearson, W. O. Bailey, Y. Yang, W. Clarkson

Proceedings Volume 7578, 75781F (2010) https://doi.org/10.1117/12.842132

KEYWORDS: Absorption, Crystals, Laser crystals, Fiber lasers, Mirrors, Solid state lasers, Temperature metrology, Spectroscopy, Resonators, Cryogenics

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Proceedings Article | 28 February 2009 Paper

Tm:fiber laser in-band pumping a cryogenically cooled Ho:YAG laser

J. Mackenzie, W. O. S. Bailey, J. W. Kim, L. Pearson, D. Y. Shen, Y. Yang, W. Clarkson

Proceedings Volume 7193, 71931H (2009) https://doi.org/10.1117/12.809165

KEYWORDS: Absorption, Fiber lasers, Crystals, Semiconductor lasers, Mirrors, Laser crystals, Laser resonators, Thermal effects, Output couplers, Tunable lasers

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Proceedings Article | 19 February 2009 Paper

Fiber design for high-power fiber lasers

Jayanta Sahu, Seongwoo Yoo, Alexander Boyland, Andrew Webb, Mridu Kalita, Jean-Noel Maran, Yoonchan Jeong, Johan Nilsson, W. Andrew Clarkson, David Payne

Proceedings Volume 7195, 71950I (2009) https://doi.org/10.1117/12.809210

KEYWORDS: Acoustics, Fiber lasers, Cladding, Refractive index, Structured optical fibers, High power fiber lasers, Scattering, Solids, Signal attenuation, Control systems

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Proceedings Article | 5 March 2008 Paper

Circular output from a high power Nd:YLF slab laser

J. Mackenzie, W. Clarkson

Proceedings Volume 6871, 68710P (2008) https://doi.org/10.1117/12.759662

KEYWORDS: Mirrors, Neodymium lasers, Diodes, Crystals, High power lasers, Output couplers, Solid state lasers, Laser resonators, Resonators, Chemical elements

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Proceedings Article | 20 February 2008 Paper

Impact of energy-transfer-upconversion on the performance of hybrid Er:YAG lasers

Ji Won Kim, J. Sahu, W. Clarkson

Proceedings Volume 6871, 68710W (2008) https://doi.org/10.1117/12.761301

KEYWORDS: Er:YAG lasers, Doping, Fiber lasers, Erbium, Continuous wave operation, Crystals, Ions, Pulsed laser operation, Laser crystals, Resonators

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Proceedings Article | 14 February 2008 Paper

High-power slab-based Tm:YLF laser for in-band pumping of Ho:YAG

S. So, J. Mackenzie, D. Shepherd, W. Clarkson

Proceedings Volume 6871, 68710R (2008) https://doi.org/10.1117/12.761822

KEYWORDS: Absorption, Holmium, Thulium, Semiconductor lasers, Output couplers, Diodes, YAG lasers, Crystals, Doping, High power lasers

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Proceedings Article | 17 April 2006 Paper

Novel concepts for high-power fibre lasers

Pu Wang, W. Clarkson, D. Shen, L. Copper, J. Sahu

Proceedings Volume 6190, 61900I (2006) https://doi.org/10.1117/12.668261

KEYWORDS: Fiber lasers, Diodes, Superluminescent sources, Absorption, Silica, Mirrors, Cladding, Fiber coatings, High power fiber lasers, Aspheric lenses

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Proceedings Article | 28 February 2006 Paper

High-power fiber-bulk hybrid lasers

W. Clarkson, Deyuan Shen, Jayanta Sahu

Proceedings Volume 6100, 61000A (2006) https://doi.org/10.1117/12.660930

KEYWORDS: Fiber lasers, Er:YAG lasers, Thulium, Mirrors, Absorption, Resonators, Continuous wave operation, Laser crystals, Reflectivity, Optical fibers

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Proceedings Article | 12 October 2005 Paper

Power scaling of cladding-pumped Er,Yb-doped fiber lasers at 1.5 µm

W. Andrew Clarkson, Deyuan Shen, Pu Wang, Laurence Cooper, Johan Nilsson, Jayanta Sahu

Proceedings Volume 5958, 59580O (2005) https://doi.org/10.1117/12.623660

KEYWORDS: Fiber lasers, Ytterbium, Absorption, Erbium, Mirrors, Ions, Reflectivity, Beam splitters, Diodes, Lenses

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Proceedings Article | 23 December 2004 Paper

Efficient holmium-doped solid state lasers pumped by a Tm-doped silica fiber laser

Deyuan Shen, Jayanta Sahu, W. Andrew Clarkson

Proceedings Volume 5620, (2004) https://doi.org/10.1117/12.578515

KEYWORDS: Fiber lasers, Absorption, Resonators, Bragg cells, Tunable lasers, Crystals, Laser resonators, Laser crystals, Mirrors, Transmission electron microscopy

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Proceedings Article | 23 December 2004 Paper

Thulium-ytterbium co-doped fiber laser with 75 W of output power at 2 µm

Yoonchan Jeong, Pascal Dupriez, Jayanta Sahu, Johan Nilsson, Deyuan Shen, W. Andrew Clarkson, Stuart Jackson

Proceedings Volume 5620, (2004) https://doi.org/10.1117/12.578727

KEYWORDS: Ytterbium, Thulium, Fiber lasers, Absorption, Diodes, Erbium, Mirrors, Tunable lasers, Coating, Energy transfer

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Proceedings Article | 23 December 2004 Paper

High-power Er:YAG laser at 1646 nm pumped by an Er, Yb fiber laser

Peter Jander, Jayanta Sahu, W. Andrew Clarkson

Proceedings Volume 5620, (2004) https://doi.org/10.1117/12.578217

KEYWORDS: Fiber lasers, Er:YAG lasers, Erbium, Crystals, Absorption, Laser crystals, Output couplers, Diodes, Ytterbium, Continuous wave operation

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Proceedings Article | 7 June 2004 Paper

Passively Q-switched Er-Yb double-clad fiber laser with Cr2+:ZnSe and Co2+:MgAl2O4 as a saturable absorber

Valery Philippov, Johan Nilsson, William Clarkson, Amin Abdolvand, V. Kisel, Victor Shcherbitsky, Nikolay Kuleshov, Valirii Konstantinov, V. Levchenko

Proceedings Volume 5335, (2004) https://doi.org/10.1117/12.524767

KEYWORDS: Chromium, Fiber lasers, Q switched lasers, Crystals, Gas lasers, Pulsed laser operation, Mirrors, Laser crystals, Q switches, Laser optics

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Proceedings Article | 7 June 2004 Paper

All-fiber 1.15-mJ pulsed eye-safe optical source

Valery Philippov, Jayanta Sahu, Christophe Codemard, William Clarkson, Joo-Nyung Jang, Johan Nilsson, Guy Pearson

Proceedings Volume 5335, (2004) https://doi.org/10.1117/12.527451

KEYWORDS: Fiber amplifiers, Fiber lasers, Optical amplifiers, Oscillators, Pulsed laser operation, High power fiber amplifiers, Q switched lasers, Amplifiers, Single mode fibers, LCDs

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Proceedings Article | 10 November 2003 Paper

High-power two-micron fiber lasers

William Clarkson, A. Abdolvand, D. Shen, R. Hayward, L. Cooper, R. Williams, J. Nilsson

Proceedings Volume 5120, (2003) https://doi.org/10.1117/12.515806

KEYWORDS: Fiber lasers, Diodes, Silica, Thulium, Diffraction gratings, Reflectivity, High power lasers, Tunable lasers, Semiconductor lasers, Wavelength tuning

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Proceedings Article | 3 July 2003 Paper

High-power fiber lasers: new developments

Johan Nilsson, Jayanta Sahu, Yoochan Jeong, W. Clarkson, R. Selvas, Anatoly Grudinin, Shaiful Alam

Proceedings Volume 4974, (2003) https://doi.org/10.1117/12.478310

KEYWORDS: Fiber lasers, Cladding, Ytterbium, Glasses, Diodes, Absorption, Laser damage threshold, Optical amplifiers, High power fiber lasers, Laser crystals

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Proceedings Article | 29 December 1998 Paper

Design considerations for high-power TEMoo operation of end-pumped solid state lasers

W. Clarkson

Proceedings Volume 3682, (1998) https://doi.org/10.1117/12.334774

KEYWORDS: Nd:YAG lasers, Resonators, Birefringence, Rod lasers, High power lasers, Modes of laser operation, Solid state lasers, Polarizers, Transmission electron microscopy, Phase measurement

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Showing 5 of 40 publications

Proceedings Volume Editor (18)

SPIE Conference Volume | 27 March 2024

Solid State Lasers XXXIII: Technology and Devices

SPIE Conference Volume | 17 April 2023

Solid State Lasers XXXII: Technology and Devices

SPIE Conference Volume | 15 April 2022

Solid State Lasers XXXI: Technology and Devices

SPIE Conference Volume | 21 April 2021

Solid State Lasers XXX: Technology and Devices

SPIE Conference Volume | 2 April 2020

Solid State Lasers XXIX: Technology and Devices

Showing 5 of 18 publications

Conference Committee Involvement (20)

Solid State Lasers XXXIV: Technology and Devices

26 January 2025 | San Francisco, California, United States

Solid State Lasers XXXIII: Technology and Devices

28 January 2024 | San Francisco, California, United States

Solid State Lasers XXXII: Technology and Devices

31 January 2023 | San Francisco, California, United States

Solid State Lasers XXXI: Technology and Devices

25 January 2022 | San Francisco, California, United States

Solid State Lasers XXX: Technology and Devices

6 March 2021 | Online Only, California, United States

Solid State Lasers XXIX: Technology and Devices

4 February 2020 | San Francisco, California, United States

Solid State Lasers XXVIII: Technology and Devices

5 February 2019 | San Francisco, California, United States

Solid State Lasers XXVII: Technology and Devices

29 January 2018 | San Francisco, California, United States

Solid State Lasers XXVI: Technology and Devices

30 January 2017 | San Francisco, California, United States

Solid State Lasers XXV: Technology and Devices

15 February 2016 | San Francisco, California, United States

Solid State Lasers XXIV: Technology and Devices

8 February 2015 | San Francisco, California, United States

Solid State Lasers XXIII: Technology and Devices

2 February 2014 | San Francisco, California, United States

Solid State Lasers XXII: Technology and Devices

3 February 2013 | San Francisco, California, United States

Solid State Lasers XXI: Technology and Devices

22 January 2012 | San Francisco, California, United States

Solid State Lasers XX: Technology and Devices

23 January 2011 | San Francisco, California, United States

Solid State Lasers XIX: Technology and Devices

24 January 2010 | San Francisco, California, United States

Solid State Lasers XVIII: Technology and Devices

25 January 2009 | San Jose, California, United States

Solid State Lasers XVII: Technology and Devices

20 January 2008 | San Jose, California, United States

Lasers and Applications

30 August 2005 | Warsaw, Poland

Solid State Laser Technologies and Femtosecond Phenomena

25 October 2004 | London, United Kingdom

Showing 5 of 20 Conference Committees

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