Prof. Alexander M. Rubenchik Profile

Prof. Alexander M. Rubenchik

at Lawrence Livermore National Lab

SPIE Involvement:

Author

Publications (95)

Proceedings Article | 4 March 2019 Presentation

Beam shape optimization for laser powder beam fusion additive manufacturing (Conference Presentation)

Alexander Rubenchik, S. Khairallah, S. Wu, G. Guss, T. Roehling, J. McKeown, M. Matthews

Proceedings Volume 10909, 109090B (2019) https://doi.org/10.1117/12.2511202

KEYWORDS: Beam shaping, Laser welding, Additive manufacturing, Fusion energy, Energy efficiency, Thermal modeling, Optical simulations, Electromagnetic simulation

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SPIE Journal Paper | 22 September 2018 Open Access

Laser space debris cleaning: elimination of detrimental self-focusing effects

Alexander M. Rubenchik, Irina A. Vaseva, Mikhail P. Fedoruk, Sergei K. Turitsyn

OE, Vol. 58, Issue 01, 011003, (September 2018) https://doi.org/10.1117/12.10.1117/1.OE.58.1.011003

KEYWORDS: Atmospheric propagation, Atmospheric modeling, Chromium, Laser beam propagation, Pulsed laser operation, Distortion, Beam propagation method, Gaussian beams, Atmospheric propagation engineering, Optical engineering

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SPIE Journal Paper | 23 December 2017 Open Access

Polarization effects associated with thermal processing of HY-80 structural steel using high-power laser diode array

Sheldon S.Q. Wu, Bradford Baker, Mark Rotter, Alexander Rubenchik, Maxwell Wiechec, Zachary Brown, Raymond Beach, Manyalibo Matthews

OE, Vol. 56, Issue 12, 124108, (December 2017) https://doi.org/10.1117/12.10.1117/1.OE.56.12.124108

KEYWORDS: Thermal effects, Semiconductor lasers, Polarization, Diodes, Iron, Temperature metrology, High power lasers, Laser applications, Metals, Cameras

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Proceedings Article | 16 May 2017 Paper

Nonlinear effects during interaction of femtosecond doughnut-shaped laser pulses with glasses: overcoming intensity clamping

Nadezhda Bulgakova, Vladimir Zhukov, Mikhail Fedoruk, Alexander Rubenchik

Proceedings Volume 10228, 102280C (2017) https://doi.org/10.1117/12.2265307

KEYWORDS: Glasses, Plasma, Femtosecond phenomena, Laser processing, Ultrafast phenomena, Free electron lasers, Pulsed laser operation, Numerical modeling, Process modeling, Maxwell's equations, Silica, Laser energy, Ionization, Laser scattering, Light scattering, Laser beam propagation

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Proceedings Article | 6 December 2016 Open Access

Laser-matter coupling mechanisms governing particulate-induced damage on optical surfaces

M. Matthews, E. Feigenbaum, S. Demos, R. Raman, S. R. Qiu, N. Shen, C. Harris, R. Negres, M. Norton, D. Cross, A. Rubenchik

Proceedings Volume 10014, 1001402 (2016) https://doi.org/10.1117/12.2244981

KEYWORDS: Near field optics, Particles, Pulsed laser operation, Plasma, Silica, Aluminum, Scattering, Laser scattering, Light scattering, Metals

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Proceedings Article | 6 December 2016 Paper

Morphology and mechanisms of picosecond ablation of metal films on fused silica substrates

Isaac Bass, Raluca Negres, Ken Stanion, Gabe Guss, Wesley Keller, Manyalibo Matthews, Alexander Rubenchik, Jae Hyuck Yoo, Jeffrey Bude

Proceedings Volume 10014, 1001414 (2016) https://doi.org/10.1117/12.2243342

KEYWORDS: Laser ablation, Metals, Picosecond phenomena, Silica, Data modeling, Scanning electron microscopy, Optical filtering, Aluminum, Confocal microscopy, Diffusion

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Proceedings Article | 14 March 2016 Paper

Ultrashort-pulse laser processing of transparent materials: insight from numerical and semi-analytical models

Nadezhda Bulgakova, Vladimir Zhukov, Inam Mirza, Yuri Meshcheryakov, Jan Tomáštík, Václav Michálek, Ondřej Haderka, Ladislav Fekete, Alexander Rubenchik, Mikhail Fedoruk, Tomáš Mocek

Proceedings Volume 9735, 97350N (2016) https://doi.org/10.1117/12.2217585

KEYWORDS: 3D modeling, Laser processing, Ultrafast phenomena, Optical simulations, Femtosecond phenomena, Dielectrics, Laser ablation, Laser damage threshold, 3D applications, Physics, Electrons, Plasma, Glasses, Silica, Solar thermal energy, Pulsed laser operation, Absorption, Free electron lasers

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Proceedings Article | 14 December 2015 Paper

Impact of particle shape on the laser-contaminant interaction induced damage on the protective capping layer of 1high reflector mirror coatings

S. Qiu, M. Norton, J. Honig, A. Rubenchik, C. Boley, A. Rigatti, C. Stolz, M. Matthews

Proceedings Volume 9632, 963208 (2015) https://doi.org/10.1117/12.2195517

KEYWORDS: Optical spheres, Particles, Silica, Laser induced damage, Plasma, Spherical lenses, Mirrors, Multilayers, Reflectors, Cameras

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Proceedings Article | 23 November 2015 Paper

Morphology of ejected debris from laser super-heated fused silica following exit surface laser-induced damage

Stavros Demos, Raluca Negres, Rajesh Raman, Michael Feit, Kenneth Manes, Alexander Rubenchik

Proceedings Volume 9632, 96320S (2015) https://doi.org/10.1117/12.2195501

KEYWORDS: Particles, Laser induced damage, Silica, Foam, Dielectrics, Temperature metrology, Pulsed laser operation, Optical fibers, Laser systems engineering, Liquids, Explosives, Scanning electron microscopy, Materials processing

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Proceedings Article | 23 November 2015 Paper

Energetic laser cleaning of metallic particles and surface damage on silica optics: investigation of the underlying mechanisms

Nan Shen, Stavros Demos, Raluca Negres, Alexander Rubenchik, Candace Harris, Manyalibo Matthews

Proceedings Volume 9632, 96320V (2015) https://doi.org/10.1117/12.2195593

KEYWORDS: Plasma, Particles, Silica, Atmospheric particles, Metals, Iron, Pulsed laser operation, Silicon, Laser energy, Laser ablation

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SPIE Journal Paper | 17 July 2014 Open Access

Temperature-dependent 780-nm laser absorption by engineering grade aluminum, titanium, and steel alloy surfaces

Alexander Rubenchik, Sheldon Wu, V. Keith Kanz, Mary LeBlanc, W. Howard Lowdermilk, Mark Rotter, Joel Stanley

OE, Vol. 53, Issue 12, 122506, (July 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.12.122506

KEYWORDS: Aluminum, Absorption, Temperature metrology, Metals, Titanium, Oxides, Semiconductor lasers, Convection, Surface finishing, Oxidation

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Proceedings Article | 2 December 2013 Paper

Interaction of laser pulse with confined plasma during exit surface nanosecond laser damage

Alexander Rubenchik, Michael Feit, Stavros Demos

Proceedings Volume 8885, 88851D (2013) https://doi.org/10.1117/12.2030482

KEYWORDS: Plasma, Laser induced damage, Pulsed laser operation, Particles, Laser development, Absorption, Silica, Dielectrics, Visualization, Laser energy

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Proceedings Article | 25 November 2013 Paper

Phase modulation in high power optical systems caused by pulsed laser-driven particle ablation events

Manyalibo Matthews, Nan Shen, Alexander Rubenchik, John Honig, Jeffrey Bude

Proceedings Volume 8885, 88850T (2013) https://doi.org/10.1117/12.2030507

KEYWORDS: Particles, Silica, Pulsed laser operation, Glasses, Laser ablation, Aluminum, Metals, Geometrical optics, Polymers, Absorption

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Proceedings Article | 14 November 2013 Paper

Comparison of material response in fused silica and KDP following exit surface laser- induced breakdown

Stavros Demos, Raluca Negres, Rajesh Raman, Alexander Rubenchik, Michael Feit

Proceedings Volume 8885, 88850W (2013) https://doi.org/10.1117/12.2030481

KEYWORDS: Silica, Particles, Laser induced damage, Materials processing, Laser systems engineering, Laser energy, Pulsed laser deposition, Laser beam diagnostics, Crystals, Plasma

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Proceedings Article | 11 February 2011 Paper

On the theory of the modulation instability in optical fiber and laser amplifiers

Alexander Rubenchik, Sergei Turitsyn, Michail Fedoruk

Proceedings Volume 7914, 791434 (2011) https://doi.org/10.1117/12.877737

KEYWORDS: Optical amplifiers, Fiber amplifiers, Modulation, Optical fibers, Fiber lasers, Amplifiers, Atmospheric propagation, Laser amplifiers, Continuous wave operation, Nonlinear optics

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Proceedings Article | 23 February 2010 Paper

Optical spectroscopy approach for the predictive assessment of kidney functional recovery following ischemic injury

Rajesh Raman, Christopher Pivetti, Alexander Rubenchik, Dennis Matthews, Christoph Troppmann, Stavros Demos

Proceedings Volume 7561, 756109 (2010) https://doi.org/10.1117/12.842413

KEYWORDS: Kidney, Injuries, Tissues, Light scattering, Ischemia, Blood, Tissue optics, Atrial fibrillation, Optical spectroscopy, Scattering

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SPIE Journal Paper | 1 March 2009 Open Access

Evaluation of the contribution of the renal capsule and cortex to kidney autofluorescence intensity under ultraviolet excitation

Rajesh Raman, Christopher Pivetti, Alexander Rubenchik, Dennis Matthews, Christoph Troppmann, Stavros Demos

JBO, Vol. 14, Issue 02, 020505, (March 2009) https://doi.org/10.1117/12.10.1117/1.3094948

KEYWORDS: Kidney, Atrial fibrillation, Tissues, Ultraviolet radiation, Signal attenuation, Luminescence, Microscopy, Mode conditioning cables, Blood, Mathematical modeling

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Proceedings Article | 30 December 2008 Paper

Laser damage growth in fused silica with simultaneous 351nm and 1053nm irradiation

Mary Norton, Adra Carr, C. Wren Carr, Eugene Donohue, Michael Feit, William Hollingsworth, Zhi Liao, Raluca Negres, Alexander Rubenchik, P. Wegner

Proceedings Volume 7132, 71321H (2008) https://doi.org/10.1117/12.804432

KEYWORDS: Laser induced damage, Silica, Current controlled current source, Laser optics, Optical damage, High power lasers, Laser systems engineering, Laser irradiation, Laser damage threshold

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Proceedings Article | 18 March 2008 Paper

Analysis of data obtained in clinical trials of optical biopsy system for breast cancer diagnostics

S. Belkov, G. Kochemasov, S. Kulikov, N. Maslov, S. Bondarenko, N. Shakhova, I. Pavlycheva, A. Rubenchik, L. Da Silva

Proceedings Volume 6859, 685920 (2008) https://doi.org/10.1117/12.776835

KEYWORDS: Tissue optics, Diagnostics, Tumors, Tissues, Scattering, Biopsy, Breast, Wavelets, Clinical trials, Optical fibers

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Proceedings Article | 18 December 2007 Paper

Does complex absorption behavior leading to conditioning and damage in KDP/DKDP reflect the electronic structure of initiators?

M. Feit, P. DeMange, R. Negres, A. Rubenchik, S. Demos

Proceedings Volume 6720, 672005 (2007) https://doi.org/10.1117/12.748444

KEYWORDS: Absorption, Laser damage threshold, Laser induced damage, Crystals, Electrons, Laser crystals, Photons, Frequency conversion, Databases, Laser energy

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Proceedings Article | 18 December 2007 Paper

Growth of laser damage in fused silica: diameter to depth ratio

Mary Norton, John Adams, C. Wren Carr, Eugene Donohue, Michael Feit, Richard Hackel, William Hollingsworth, Jeffrey Jarboe, Manyalibo Matthews, Alexander Rubenchik, Mary Spaeth

Proceedings Volume 6720, 67200H (2007) https://doi.org/10.1117/12.748441

KEYWORDS: Laser induced damage, Silica, Laser systems engineering, Scanning electron microscopy, Cameras, Microscopes, Optical microscopes, Beam shaping, CCD cameras, High power lasers

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Proceedings Article | 10 May 2007 Paper

Evolution of a solid state laser

R. Yamamoto, J. Parker, K. Allen, R. Allmon, K. Alviso, C. Barty, B. Bhachu, C. Boley, A. Burnham, R. Combs, K. Cutter, S. Fochs, S. Gonzales, R. Hurd, K. LaFortune, W. Manning, M. McClelland, R. Merrill, L. Molina, C. Parks, P. Pax, A. Posey, M. Rotter, B. Roy, A. Rubenchik, T. Soules, D. Webb

Proceedings Volume 6552, 655205 (2007) https://doi.org/10.1117/12.720965

KEYWORDS: Diodes, Semiconductor lasers, Solid state lasers, Ceramics, Laser development, Laser systems engineering, Nd:YAG lasers, Laser applications, Diffusers, Diode pumped solid state lasers

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Proceedings Article | 15 January 2007 Paper

Importance of free surfaces for damage crater formation

M. Feit, A. Rubenchik

Proceedings Volume 6403, 64030A (2007) https://doi.org/10.1117/12.696343

KEYWORDS: Laser induced damage, Laser energy, Absorption, Reflection, Silica, Plasma, Distance measurement, Ultraviolet radiation, Laser damage threshold, Motion models

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Proceedings Article | 15 January 2007 Paper

Results of sub-nanosecond laser-conditioning of KD2PO4 crystals

J. Adams, J. Jarboe, C. Carr, M. Feit, R. Hackel, J. Halpin, J. Honig, L. Lane, R. Luthi, J. Peterson, D. Ravizza, F. Ravizza, A. Rubenchik, W. Sell, J. Vickers, T. Weiland, T. Wennberg, D. Willard, M. Yeoman

Proceedings Volume 6403, 64031M (2007) https://doi.org/10.1117/12.696086

KEYWORDS: Picosecond phenomena, Crystals, Laser crystals, Pulsed laser operation, Microscopes, Laser induced damage, Laser damage threshold, Laser systems engineering, Bulk lasers, Surface finishing

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Proceedings Article | 15 January 2007 Paper

Growth of laser damage on the input surface of SiO2 at 351 nm

Mary Norton, Eugene Donohue, Michael Feit, Richard Hackel, William Hollingsworth, Alexander Rubenchik, Mary Spaeth

Proceedings Volume 6403, 64030L (2007) https://doi.org/10.1117/12.696085

KEYWORDS: Laser induced damage, Silica, Laser systems engineering, Microscopes, Plasma, Laser optics, Photomicroscopy, Optical testing, Laser damage threshold, Beam shaping

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Proceedings Article | 7 February 2006 Paper

A summary of recent damage-initiation experiments on KDP crystals

C.W. Carr, M.D. Feit, A.M. Rubenchik, J.B. Trenholme, M.L. Spaeth

Proceedings Volume 5991, 59911Q (2006) https://doi.org/10.1117/12.638829

KEYWORDS: Crystals, Absorption, Laser induced damage, Gaussian pulse, Pulsed laser operation, Calibration, Laser crystals, Light scattering, Scatter measurement, Laser scattering

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Proceedings Article | 7 February 2006 Paper

Growth of laser damage in SiO₂ under multiple wavelength irradiation

Mary Norton, Eugene Donohue, Michael Feit, Richard Hackel, William Hollingsworth, Alexander Rubenchik, Mary Spaeth

Proceedings Volume 5991, 599108 (2006) https://doi.org/10.1117/12.638833

KEYWORDS: Laser induced damage, Laser systems engineering, Silica, Laser damage threshold, CCD cameras, Optical components, Frequency converters, Cameras, Frequency conversion, Laser applications

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Proceedings Article | 7 February 2006 Paper

Size-selection initiation model extended to include shape and random factors

John Trenholme, Michael Feit, Alexander Rubenchik

Proceedings Volume 5991, 59910X (2006) https://doi.org/10.1117/12.638834

KEYWORDS: Absorption, Diffusion, Data modeling, Convolution, Laser induced damage, Pulsed laser operation, Laser irradiation, Stochastic processes, Particles, Temperature metrology

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Proceedings Article | 7 February 2006 Paper

Wavelength and pulselength dependence of laser conditioning and bulk damage in doubler-cut KH₂PO₄

J.J. Adams, J.R. Bruere, M. Bolourchi, C.W. Carr, M.D. Feit, R.P. Hackel, D.E. Hahn, J.A. Jarboe, L.A. Lane, R.L. Luthi, J.N. McElroy, A.M. Rubenchik, J.R. Stanley, W.D. Sell, J.L. Vickers, T.L. Weiland, D.A. Willard

Proceedings Volume 5991, 59911R (2006) https://doi.org/10.1117/12.638827

KEYWORDS: Crystals, Laser crystals, Picosecond phenomena, Excimer lasers, Bulk lasers, Digital imaging, Laser scattering, Excimers, Laser induced damage, Image processing

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Proceedings Article | 7 February 2006 Paper

Simple model of laser damage initiation and conditioning in frequency conversion crystals

M.D. Feit, A.M. Rubenchik, J.B. Trenholme

Proceedings Volume 5991, 59910W (2006) https://doi.org/10.1117/12.638830

KEYWORDS: Laser crystals, Crystals, Laser induced damage, Frequency conversion, Absorption, Laser damage threshold, Resistance, Plasma, Data modeling, Bulk lasers

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Proceedings Article | 21 February 2005 Paper

Growth of laser initiated damage in fused silica at 1053 nm

Mary Norton, Eugene Donohue, William Hollingsworth, Michael Feit, Alexander Rubenchik, Richard Hackel

Proceedings Volume 5647, (2005) https://doi.org/10.1117/12.585930

KEYWORDS: Laser induced damage, Silica, Photomicroscopy, Cameras, Laser damage threshold, Laser applications, Plasma, Laser optics, Laser systems engineering, Polishing

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Proceedings Article | 21 February 2005 Paper

The nature of emission from optical breakdown induced by pulses of fs and ns duration

Christopher Carr, Michael Feit, Alexander Rubenchik, Paul DeMange, Sergei Kucheyev, Michael Shirk, Harry Radousky, Stavros Demos

Proceedings Volume 5647, (2005) https://doi.org/10.1117/12.585925

KEYWORDS: Plasma, Laser induced fluorescence, Femtosecond phenomena, Pulsed laser operation, Chromium, Black bodies, Harmonic generation, Ionization, Time metrology, Second-harmonic generation

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Proceedings Article | 21 February 2005 Paper

Effect on scattering of complex morphology of DKDP bulk damage sites

Christopher Carr, Michael Feit, J. Muyco, Alexander Rubenchik

Proceedings Volume 5647, (2005) https://doi.org/10.1117/12.585927

KEYWORDS: Scattering, Raman scattering, Laser scattering, Raman spectroscopy, Crystals, Laser induced damage, Scanning electron microscopy, Photomicroscopy, Laser crystals, Refractive index

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Proceedings Article | 21 February 2005 Paper

Pulse length dependence of laser conditioning and bulk damage in KD2PO4

John Adams, Timothy Weiland, Joel Stanley, Walter Sell, Ronald Luthi, James Vickers, Christopher Carr, Michael Feit, Alexander Rubenchik, Mary Spaeth, Richard Hackel

Proceedings Volume 5647, (2005) https://doi.org/10.1117/12.585904

KEYWORDS: Picosecond phenomena, Crystals, Laser crystals, Pulsed laser operation, Calibration, Bulk lasers, YAG lasers, Excimer lasers, Laser induced damage, Laser optics

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Proceedings Article | 10 June 2004 Paper

Implications of nanoabsorber initiators for damage probability curves, pulselength scaling, and laser conditioning

Michael Feit, Alexander Rubenchik

Proceedings Volume 5273, (2004) https://doi.org/10.1117/12.523862

KEYWORDS: Particles, Absorption, Laser damage threshold, Crystals, Pulsed laser operation, Laser induced damage, Surface finishing, Oxygen, Data modeling, Laser systems engineering

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Proceedings Article | 10 June 2004 Paper

Development of a process model for CO2 laser mitigation of damage growth in fused silica

Michael Feit, Alexander Rubenchik, Charles Boley, Mark Rotter

Proceedings Volume 5273, (2004) https://doi.org/10.1117/12.523867

KEYWORDS: Silica, Process modeling, Beam shaping, Carbon dioxide lasers, Gas lasers, Laser induced damage, Thermal modeling, Laser energy, Absorption, Optical simulations

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Proceedings Article | 10 June 2004 Paper

Influence of subsurface cracks on laser-induced surface damage

Michael Feit, Alexander Rubenchik

Proceedings Volume 5273, (2004) https://doi.org/10.1117/12.523864

KEYWORDS: Laser induced damage, Absorption, Silica, Electrons, Polishing, Reflection, Particles, Surface finishing, Oxygen, Laser damage threshold

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Proceedings Article | 10 November 2003 Paper

Second harmonic generation in collagen

Karen Reiser, Patrick Stoller, Peter Celliers, Alexander Rubenchik, Clay Bratton, Diego Yankelevich

Proceedings Volume 5212, (2003) https://doi.org/10.1117/12.510427

KEYWORDS: Collagen, Second-harmonic generation, Tissues, Cartilage, Liver, In vitro testing, Harmonic generation, Polarization, Modulation, Signal detection

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Proceedings Article | 10 July 2003 Paper

Effect of structural modification on second harmonic generation in collagen

Patrick Stoller, Karen Reiser, Peter Celliers, Alexander Rubenchik

Proceedings Volume 4963, (2003) https://doi.org/10.1117/12.477998

KEYWORDS: Collagen, Second-harmonic generation, Polarization, Modulation, Signal detection, Tissues, Electrooptic modulators, Quartz, Harmonic generation, Calibration

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Proceedings Article | 30 May 2003 Paper

Analysis of raster scanning damage and conditioning experiments

Michael Feit, Alexander Rubenchik

Proceedings Volume 4932, (2003) https://doi.org/10.1117/12.472048

KEYWORDS: Raster graphics, Gaussian beams, National Ignition Facility, Optical testing, Silica, Laser induced damage, Laser optics, Statistical analysis, Chlorine, Atrial fibrillation

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Proceedings Article | 30 May 2003 Paper

Mechanisms of CO2 laser mitigation of laser damage growth in fused silica

Michael Feit, Alexander Rubenchik

Proceedings Volume 4932, (2003) https://doi.org/10.1117/12.472049

KEYWORDS: Silica, Carbon dioxide lasers, Laser induced damage, Laser ablation, Thermal effects, Glasses, Pulsed laser operation, Plasma etching, Resistance, Laser optics

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Proceedings Article | 17 June 2002 Paper

Imaging collagen orientation using polarization-modulated second harmonic generation

Patrick Stoller, Peter Celliers, Karen Reiser, Alexander Rubenchik

Proceedings Volume 4620, (2002) https://doi.org/10.1117/12.470690

KEYWORDS: Tissues, Collagen, Second-harmonic generation, Liver, Harmonic generation, Skin, Modulation, Signal detection, Electrooptic modulators, Image segmentation

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Proceedings Article | 9 April 2002 Paper

Structural modifications in fused silica due to laser-damage-induced shock compression

Alison Kubota, Maria-Jose Caturla, Lilian Davila, James Stolken, Babak Sadigh, A. Quong, Alexander Rubenchik, Michael Feit

Proceedings Volume 4679, (2002) https://doi.org/10.1117/12.461717

KEYWORDS: Silica, Chlorine, Particles, Silicon, Chemical species, Acoustics, Laser induced damage, Ultraviolet radiation, Wave propagation, High power lasers

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Proceedings Article | 9 April 2002 Paper

Engineered defects for investigation of laser-induced damage of fused silica at 355 nm

Alex Hamza, Wigbert Siekhaus, Alexander Rubenchik, Michael Feit, Lloyd Chase, M. Savina, Michael Pellin, Ian Hutcheon, Mike Nostrand, Michael Runkel, Bill Choi, Michael Staggs, Michael Fluss

Proceedings Volume 4679, (2002) https://doi.org/10.1117/12.461716

KEYWORDS: Gold, Particles, Silica, Laser induced damage, Laser damage threshold, Nanoparticles, Microscopy, Coating, Atomic force microscopy, Pulsed laser operation

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Proceedings Article | 9 April 2002 Paper

Initiation, growth, and mitigation of UV-laser-induced damage in fused silica

Alexander Rubenchik, Michael Feit

Proceedings Volume 4679, (2002) https://doi.org/10.1117/12.461680

KEYWORDS: Absorption, Silica, Plasma, Electrons, Polishing, Laser induced damage, Ionization, Nanoparticles, Particles, Glasses

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Proceedings Article | 9 April 2002 Paper

Methods for mitigating surface damage growth in NIF final optics

Lawrence Hrubesh, Mary Norton, William Molander, Eugene Donohue, Stephen Maricle, Bernie Penetrante, Raymond Brusasco, Walter Grundler, Jim Butler, Jeff Carr, R. Hill, Leslie Summers, Michael Feit, Alexander Rubenchik, Michael Key, Paul Wegner, Alan Burnham, Lloyd Hackel, Mark Kozlowski

Proceedings Volume 4679, (2002) https://doi.org/10.1117/12.461723

KEYWORDS: Silica, Carbon dioxide lasers, Etching, National Ignition Facility, Laser induced damage, Plasma, Carbon dioxide, Wet etching, Fluorine, Contamination

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Proceedings Article | 9 April 2002 Paper

Time-resolved spectroscopic investigation of emission observed during damage in the bulk of fused silica and DKDP crystals

Christopher Carr, Harry Radousky, Michael Staggs, Alexander Rubenchik, Michael Feit, Stavros Demos

Proceedings Volume 4679, (2002) https://doi.org/10.1117/12.461714

KEYWORDS: Silica, Mirrors, Spectroscopy, Black bodies, Pulsed laser operation, Crystals, Time resolved spectroscopy, Laser induced damage, Plasma, Off axis mirrors

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SPIE Journal Paper | 1 April 2002 Open Access

Polarization-dependent optical second-harmonic imaging of rat-tail tendon

Patrick Stoller, Beop-Min Kim, Alexander Rubenchik, Karen Reiser, Luiz Da Silva

JBO, Vol. 7, Issue 02, (April 2002) https://doi.org/10.1117/12.10.1117/1.1431967

KEYWORDS: Polarization, Collagen, Second-harmonic generation, Tissues, Backscatter, Data modeling, Harmonic generation, Optical imaging, Biomedical optics, Microscopes

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SPIE Journal Paper | 1 July 2001 Open Access

Influence of pulse duration on ultrashort laser pulse ablation of biological tissues

Beop-Min Kim, Michael Feit, Alexander Rubenchik, E. Joslin, Peter Celliers, Juergen Eichler, Luiz Da Silva

JBO, Vol. 6, Issue 03, (July 2001) https://doi.org/10.1117/12.10.1117/1.1381561

KEYWORDS: Picosecond phenomena, Tissues, Laser ablation, Electrons, Ultrafast phenomena, Plasmas, Absorption, Beam splitters, Ionization, Natural surfaces

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Proceedings Article | 29 May 2001 Paper

Measurement of the second-order nonlinear susceptibility of collagen using polarization modulation and phase-sensitive detection

Patrick Stoller, Beop-Min Kim, Alexander Rubenchik, Karen Reiser, Luiz Da Silva

Proceedings Volume 4276, (2001) https://doi.org/10.1117/12.428013

KEYWORDS: Collagen, Modulation, Polarization, Signal detection, Tissues, Second-harmonic generation, Phase shift keying, Harmonic generation, Phase shifts, Confocal microscopy

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Proceedings Article | 12 April 2001 Paper

Growth of laser-initiated damage in fused silica at 351 nm

Mary Norton, Lawrence Hrubesh, Zhouling Wu, Eugene Donohue, Michael Feit, Mark Kozlowski, David Milam, Kurt Neeb, William Molander, Alexander Rubenchik, Walter Sell, Paul Wegner

Proceedings Volume 4347, (2001) https://doi.org/10.1117/12.425055

KEYWORDS: Laser induced damage, Silica, UV optics, Ultraviolet radiation, Sol-gels, Antireflective coatings, Laser marking

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Proceedings Article | 12 April 2001 Paper

Scaling relations for laser damage initiation craters

Michael Feit, Lawrence Hrubesh, Alexander Rubenchik, Jen Nan Wong

Proceedings Volume 4347, (2001) https://doi.org/10.1117/12.425053

KEYWORDS: Laser induced damage, Silica, National Ignition Facility, Glasses, Absorption, Air contamination, Laser energy, Ultraviolet radiation, Polishing, Liquids

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Proceedings Article | 12 April 2001 Paper

Results of pulse-scaling experiments on rapid-growth DKDP triplers using the Optical Sciences Laser at 351 nm

Michael Runkel, Alan Burnham, David Milam, Walter Sell, Michael Feit, Alexander Rubenchik

Proceedings Volume 4347, (2001) https://doi.org/10.1117/12.425024

KEYWORDS: Laser optics, Photometry, National Ignition Facility, Crystals, Optical microcavities, Microscopes, Inspection, Calibration, Chlorine, Laser crystals

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Proceedings Article | 12 April 2001 Paper

Analysis of bulk DKDP damage distribution, obscuration, and pulse-length dependence

Michael Feit, Alexander Rubenchik, Michael Runkel

Proceedings Volume 4347, (2001) https://doi.org/10.1117/12.425052

KEYWORDS: Particles, Absorption, Diffusion, Laser damage threshold, Spherical lenses, Crystals, Laser induced damage, Pulsed laser operation, Refractive index, National Ignition Facility

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Proceedings Article | 16 August 2000 Paper

Metal processing with ultrashort laser pulses

Paul Banks, M. Felt, Aleksey Komashko, Michael Perry, Alexander Rubenchik, Brent Stuart

Proceedings Volume 4065, (2000) https://doi.org/10.1117/12.407345

KEYWORDS: Absorption, Laser ablation, Aluminum, Metals, Modulation, Polarization, Pulsed laser operation, Plasma, Femtosecond phenomena, Laser energy

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Proceedings Article | 13 June 2000 Paper

Confocal imaging of biological tissues using second harmonic generation

Beop-Min Kim, Patrick Stoller, Karen Reiser, Juergen Eichler, Ming Yan, Alexander Rubenchik, Luiz Da Silva

Proceedings Volume 3914, (2000) https://doi.org/10.1117/12.388066

KEYWORDS: Tissues, Collagen, Confocal microscopy, Signal detection, Second-harmonic generation, Skin, Harmonic generation, Imaging systems, Arteries, Teeth

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Proceedings Article | 13 June 2000 Paper

Analysis of stress waves generated in water using ultrashort laser pulses

Beop-Min Kim, Michael Feit, Alexander Rubenchik, Aleksey Komashko, Ernest Reidt, Juergen Eichler, Luiz Da Silva

Proceedings Volume 3914, (2000) https://doi.org/10.1117/12.388043

KEYWORDS: Ultrafast phenomena, Laser ablation, Mach-Zehnder interferometers, Spherical lenses, Water, Acoustics, Energy transfer, Plasma generation, Plasma, Dye lasers

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Proceedings Article | 23 May 2000 Paper

Femtosecond laser materials processing

Paul Banks, Brent Stuart, Aleksey Komashko, Michael Feit, Alexander Rubenchik, Michael Perry

Proceedings Volume 3934, (2000) https://doi.org/10.1117/12.386356

KEYWORDS: Femtosecond phenomena, Copper, Picosecond phenomena, Laser ablation, Aluminum, Plasma, Metals, Materials processing, Explosives, Laser energy

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Proceedings Article | 14 April 2000 Paper

Confocal imaging of biological tissues using second harmonic generation

Beop-Min Kim, Patrick Stoller, Karen Reiser, Juergen Eichler, Ming Yan, Alexander Rubenchik, Luiz Da Silva

Proceedings Volume 3927, (2000) https://doi.org/10.1117/12.382051

KEYWORDS: Tissues, Collagen, Confocal microscopy, Signal detection, Second-harmonic generation, Skin, Harmonic generation, Imaging systems, Arteries, Teeth

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Proceedings Article | 23 March 2000 Paper

Modeling of long-term behavior of ablation plumes produced with ultrashort laser pulses

Aleksey Komashko, Michael Feit, Alexander Rubenchik

Proceedings Volume 3935, (2000) https://doi.org/10.1117/12.380796

KEYWORDS: Laser ablation, Pulsed laser operation, 3D modeling, Ultrafast phenomena, Clouds, Optical simulations, Laser energy, Absorption, Laser packaging, Aluminum

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Proceedings Article | 23 July 1999 Paper

Modeling of laser knife-edge and pinhole experiments

Charles Boley, Kent Estabrook, Jerome Auerbach, Michael Feit, Alexander Rubenchik

Proceedings Volume 3492, (1999) https://doi.org/10.1117/12.354166

KEYWORDS: Plasma, Tantalum, Iron, Spatial filters, Wavefronts, Laser beam diagnostics, Beam propagation method, Diamond, Wave propagation, Phase shifts

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Proceedings Article | 23 July 1999 Paper

Thin film contamination effects on laser-induced damage of fused silica surfaces at 355 nm

Francois Genin, Alexander Rubenchik, Alan Burnham, Michael Feit, J. Yoshiyama, Anne Fornier, C. Cordillot, Daniel Schirmann

Proceedings Volume 3492, (1999) https://doi.org/10.1117/12.354235

KEYWORDS: Silica, Contamination, Metals, Copper, Absorption, Thin films, Gold, Aluminum, Laser damage threshold, Laser induced damage

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Proceedings Article | 23 July 1999 Paper

Statistical description of laser damage initiation in NIF and LMJ Optics at 355 nm

Michael Feit, Francois Genin, Alexander Rubenchik, Lynn Sheehan, Sheldon Schwartz, Mark Kozlowski, Jean DiJon, Pierre Garrec, Jean Hue

Proceedings Volume 3492, (1999) https://doi.org/10.1117/12.354232

KEYWORDS: National Ignition Facility, Laser induced damage, Laser damage threshold, Silica, Statistical analysis, Glasses, Polishing, Gaussian beams, Raster graphics, Data modeling

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Proceedings Article | 7 April 1999 Paper

Single-beam photothermal microscopy: a new diagnostic tool for optical materials

Zhouling Wu, Michael Feit, Mark Kozlowski, Jean-Yves Natoli, Alexander Rubenchik, Lynn Sheehan, Ming Yan

Proceedings Volume 3578, (1999) https://doi.org/10.1117/12.344423

KEYWORDS: Laser scattering, Scattering, Laser beam diagnostics, Laser induced damage, Signal detection, Microscopy, Modulation, Spatial resolution, Defect detection, Sensors

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Proceedings Article | 7 April 1999 Paper

Laser modulated scattering as a nondestructive evaluation tool for optical surfaces and thin film coatings

Zhouling Wu, Michael Feit, Mark Kozlowski, Alexander Rubenchik, Lynn Sheehan

Proceedings Volume 3578, (1999) https://doi.org/10.1117/12.344422

KEYWORDS: Laser scattering, Scattering, Laser beam diagnostics, Absorption, Modulation, Laser induced damage, Nondestructive evaluation, Signal detection, Optical coatings, Surface finishing

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Proceedings Article | 7 April 1999 Paper

Extrapolation of damage test data to predict performance of large-area NIF optics at 355 nm

Michael Feit, Alexander Rubenchik, Mark Kozlowski, Francois Genin, Sheldon Schwartz, Lynn Sheehan

Proceedings Volume 3578, (1999) https://doi.org/10.1117/12.344413

KEYWORDS: National Ignition Facility, Laser induced damage, Statistical analysis, Laser damage threshold, Gaussian beams, Silica, Beam shaping, Raster graphics, Analytical research, Polishing

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Proceedings Article | 18 May 1998 Paper

Plasma luminescence feedback control system for precise ultrashort pulse laser tissue ablation

Beop-Min Kim, Michael Feit, Alexander Rubenchik, David Gold, Christopher Darrow, John Marion, Luiz Da Silva

Proceedings Volume 3255, (1998) https://doi.org/10.1117/12.308212

KEYWORDS: Luminescence, Bone, Spinal cord, Plasma, Tissues, Laser ablation, Ultrafast phenomena, Pulsed laser operation, Signal detection, Feedback control

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Proceedings Article | 13 May 1998 Paper

Ultrashort-pulse laser ablation of biological tissue

Beop-Min Kim, Michael Feit, Alexander Rubenchik, David Gold, Brent Stuart, Luiz Da Silva

Proceedings Volume 3254, (1998) https://doi.org/10.1117/12.308165

KEYWORDS: Picosecond phenomena, Laser ablation, Plasma, Laser tissue interaction, Tissues, Ultrafast phenomena, Wave propagation, Pulsed laser operation, Teeth, Ionization

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Proceedings Article | 20 April 1998 Paper

Thin film contamination effects on laser-induced damage of fused silica surfaces at 355 nm

Anne Fornier, C. Cordillot, D. Schirman, Francois Genin, Alan Burnham, Pamela Whitman, Michael Feit, Alexander Rubenchik, J. Yoshiyama

Proceedings Volume 3244, (1998) https://doi.org/10.1117/12.307038

KEYWORDS: Thin films, Contamination, Silica, Laser induced damage, Laser damage threshold, Sputter deposition, Optical components, Nd:YAG lasers, Optical microscopy, Scanning electron microscopy

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Proceedings Article | 20 April 1998 Paper

Modeling of laser-induced surface cracks in silica at 355 nm

Michael Feit, Jack Campbell, Douglas Faux, Francois Genin, Mark Kozlowski, Alexander Rubenchik, Robert Riddle, Alberto Salleo, J. Yoshiyama

Proceedings Volume 3244, (1998) https://doi.org/10.1117/12.307035

KEYWORDS: Silica, Absorption, Laser energy, Nanoparticles, Optical simulations

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Proceedings Article | 20 April 1998 Paper

Pulse-shape and pulse-length scaling of ns pulse laser damage threshold due to rate limiting by thermal conduction

Michael Feit, Alexander Rubenchik, Alberto Salleo, David Eimerl

Proceedings Volume 3244, (1998) https://doi.org/10.1117/12.306987

KEYWORDS: Laser damage threshold

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Proceedings Article | 8 December 1997 Paper

Development of long-lifetime low-contamination beam dumps for NIF

Mary Norton, James Murray, Charles Boley, David Milam, Walter Sell, Michael Feit, Alexander Rubenchik

Proceedings Volume 3047, (1997) https://doi.org/10.1117/12.294302

KEYWORDS: National Ignition Facility, Laser ablation, Glasses, Reflection, Laser damage threshold, Spatial filters, Metals, Tantalum, Optical amplifiers, Tungsten

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Proceedings Article | 8 December 1997 Paper

Surface-contamination-initiated laser damage

Michael Feit, Alexander Rubenchik, Douglas Faux, Robert Riddle, Arthur Shapiro, David Eder, Bernie Penetrante, David Milam, Francois Genin, Mark Kozlowski

Proceedings Volume 3047, (1997) https://doi.org/10.1117/12.294335

KEYWORDS: Particles, Plasma, Laser induced damage, Absorption, Aluminum, Diffraction, Atmospheric particles, Ionization, Contamination, Plasma generation

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Proceedings Article | 8 December 1997 Paper

Laser intensity modulation by nonabsorbing defects

Michael Feit, Alexander Rubenchik

Proceedings Volume 3047, (1997) https://doi.org/10.1117/12.294285

KEYWORDS: Refractive index, Modulation, Spherical lenses, Optical spheres, Laser induced damage, Lenses, Phase shifts, Glasses, Microlens, Silica

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Proceedings Article | 8 December 1997 Paper

Spatial filter issues

James Murray, Kent Estabrook, David Milam, Walter Sell, Bruno Van Wonterghem, Michael Feit, Alexander Rubenchik

Proceedings Volume 3047, (1997) https://doi.org/10.1117/12.294305

KEYWORDS: Spatial filters, National Ignition Facility, Plasma, Diagnostics, Near field, Distortion, Electrons, Interferometry, Pulsed laser operation, Interferometers

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Proceedings Article | 16 June 1997 Paper

Extended Rayleigh model of bubble evolution with material strength compared to detailed dynamic simulations

Michael Glinsky, Peter Amendt, David Bailey, Richard London, Alexander Rubenchik, Moshe Strauss

Proceedings Volume 2975, (1997) https://doi.org/10.1117/12.275496

KEYWORDS: Interfaces, Performance modeling, Acoustics, Solids, Picosecond phenomena, Fiber lasers, Wave propagation, Spherical lenses, Computer simulations, Optical simulations

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Proceedings Article | 13 May 1997 Paper

Laser intensity modulation by nonabsorbing defects

Michael Feit, Alexander Rubenchik

Proceedings Volume 2966, (1997) https://doi.org/10.1117/12.274235

KEYWORDS: Refractive index, Spherical lenses, Modulation, Lenses, Microlens, Optical spheres, Laser induced damage, Phase shifts, Glasses, Geometrical optics

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Proceedings Article | 13 May 1997 Paper

Modeling of laser damage initiated by surface contamination

Michael Feit, Alexander Rubenchik, Douglas Faux, Robert Riddle, Arthur Shapiro, David Eder, Bernie Penetrante, David Milam, Francois Genin, Mark Kozlowski

Proceedings Volume 2966, (1997) https://doi.org/10.1117/12.274234

KEYWORDS: Particles, Plasma, Laser induced damage, Absorption, Diffraction, Contamination, Atmospheric particles, Ionization, Aluminum, Atmospheric propagation

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We are engaged in a comprehensive effort to understand and model the initiation and growth of laser damage initiated by surface contaminants. This includes, for example, the initial absorption by the contaminant, heating and plasma generation, pressure and thermal loading of the transparent substrate, and subsequent shockwave propagation, 'splashing' of molten material and possible spallation, optical propagation and scattering, and treatment of material fracture. The integration use of large radiation hydrodynamics codes, optical propagation codes and material strength codes enables a comprehensive view of the damage process. On the entrance optical surface, small particles can ablate nearly completely. In this case, only relatively weak shockwaves are launched into the substrate, but some particulate materials may be left on the surface to act as a diffraction mask and cause further absorption. DIffraction by wavelength scale scattering centers can lead to significant intensity modulation. Larger particles will not be completely vaporized. The shockwave generated in this case is larger and can lead to spallation of contaminant material which then may be deposited in the substrate. A gaseous atmosphere can lead to radiation trapping with concomitant increases in temperature and pressure near the surface. In addition, supersonic ionization waves in air may be generated which greatly extend the plasma plume spatially and temporally. Contaminants on the exit optical surface behave differently. They tend to heat and pop off completely in which case significant damage may not occur. Since plasma formed at the interface of the optic and absorbing particle is confined, much stronger pressures are generated in this case. Imaging of contaminants resulting in 'writing' a diffraction pattern on the exit surface due to contamination on the entrance surface has been observed experimentally and predicted theoretically. Such imprinted damage regions can seed damage from subsequent pulses.

Proceedings Article | 27 May 1996 Paper

Ultrashort-pulse optical damage

Brent Stuart, Michael Feit, Steve Herman, Alexander Rubenchik, Bruce Shore, Michael Perry

Proceedings Volume 2714, (1996) https://doi.org/10.1117/12.240404

KEYWORDS: Electrons, Laser damage threshold, Dielectrics, Picosecond phenomena, Gold, Ionization, Plasma, Diffraction gratings, Multilayers, Pulsed laser operation

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Proceedings Article | 17 May 1996 Paper

Applications of ultrashort pulse lasers for hard tissue surgery

Joseph Neev, William Carrasco, William Armstrong, Luiz Da Silva, Michael Feit, Dennis Matthews, Michael Perry, Alexander Rubenchik, Brent Stuart

Proceedings Volume 2671, (1996) https://doi.org/10.1117/12.239993

KEYWORDS: Laser ablation, Laser tissue interaction, Pulsed laser operation, Laser dentistry, Laser applications, Bone, Natural surfaces, Tissues, Ultrafast phenomena, Laser drilling

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Proceedings Article | 7 May 1996 Paper

Computational modeling of ultrashort-pulse ablation of enamel

Richard London, David Bailey, David Young, W. Alley, Michael Feit, Alexander Rubenchik, Joseph Neev

Proceedings Volume 2681, (1996) https://doi.org/10.1117/12.239580

KEYWORDS: Absorption, Laser ablation, Teeth, Tissues, Optical simulations, Laser tissue interaction, Plasma, Motion models, Computer simulations, Solids

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Proceedings Article | 7 May 1996 Paper

Comparison of soft and hard tissue ablation with sub-ps and ns pulse lasers

Luiz Da Silva, Brent Stuart, Peter Celliers, T. Chang, Michael Feit, Michael Glinsky, Nicholas Heredia, Steve Herman, Stephen Lane, Richard London, Dennis Matthews, Joseph Neev, Michael Perry, Alexander Rubenchik

Proceedings Volume 2681, (1996) https://doi.org/10.1117/12.239573

KEYWORDS: Laser ablation, Picosecond phenomena, Pulsed laser operation, Laser tissue interaction, Tissues, Plasma, Laser dentistry, Collagen, Ultrafast phenomena, Temperature metrology

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