Dr. Shamasundar N. Dixit Profile

Dr. Shamasundar N. Dixit

Physicist, Optical Engineer at Lawrence Livermore National Lab

SPIE Involvement:

Author

Publications (30)

Proceedings Article | 28 August 2014 Paper

MOIRE: ground demonstration of a large aperture diffractive transmissive telescope

Paul Atcheson, Jeanette Domber, Kevin Whiteaker, Jerald Britten, Shamasundar Dixit, Brandon Farmer

Proceedings Volume 9143, 91431W (2014) https://doi.org/10.1117/12.2054104

KEYWORDS: Moire patterns, Space telescopes, Telescopes, Diffractive optical elements, Imaging systems, Active optics, Relays, Light emitting diodes, Modulation transfer functions, Aerospace engineering

Read Abstract +

Proceedings Article | 20 February 2013 Paper

The National Ignition Facility: beam area increase

S. Burkhart, A. Awwal, M. Borden, T. Budge, J. Campbell, S. Dixit, M. Henesian , K. Jancaitis, D. Jedlovec, R. Leach, R. Lowe-Webb, B. MacGowan, S. Pratuch, J. Palma, T. Salmon, D. Smauley, L. Smith, S. Sommer, P. Wegner, K. Wilhelmsen, M. Witte, N. Wong

Proceedings Volume 8602, 860203 (2013) https://doi.org/10.1117/12.2009402

KEYWORDS: National Ignition Facility, Relays, Optical amplifiers, Telescopes, Image processing, Fusion energy, Data acquisition, Mirrors, Laser energy, Spatial filters

Read Abstract +

Proceedings Article | 18 February 2013 Paper

Image processing and control of a programmable spatial light modulator for spatial beam shaping

Abdul A. Awwal, Charles Orth, Eddy Tse, JoAnn Matone, Mitanu Paul, Carla Hardy, Gordon Brunton, Mark Hermann, Steve Yang, J. M. DiNicola, Matt Rever, Sham Dixit, John Heebner

Proceedings Volume 8602, 86020A (2013) https://doi.org/10.1117/12.2008542

KEYWORDS: Calibration, Beam shaping, National Ignition Facility, Image processing, Transmittance, Control systems, Liquid crystal on silicon, Spatial light modulators, Process control, Modulation

Read Abstract +

Proceedings Article | 21 September 2012 Paper

MOIRE: initial demonstration of a transmissive diffractive membrane optic for large lightweight optical telescopes

Paul Atcheson, Chris Stewart, Jeanette Domber, Kevin Whiteaker, Jerold Cole, Peter Spuhler, Aaron Seltzer, Jerald Britten, Shamasundar Dixit, Brandon Farmer, Lensey Smith

Proceedings Volume 8442, 844221 (2012) https://doi.org/10.1117/12.925413

KEYWORDS: Space telescopes, Telescopes, Diffractive optical elements, Moire patterns, Wavefronts, Glasses, Imaging systems, Mirrors, Diffraction, Etching

Read Abstract +

Proceedings Article | 19 February 2011 Paper

Programmable beam spatial shaping system for the National Ignition Facility

John Heebner, Michael Borden, Phil Miller, Steve Hunter, Kim Christensen, Michael Scanlan, Chris Haynam, Paul Wegner, Mark Hermann, Gordon Brunton, Eddy Tse, Abdul Awwal, Nan Wong, Lynn Seppala, Mark Franks, Ed Marley, Kevin Williams, Tracy Budge, Mark Henesian, Christopher Stolz, Tayyab Suratwala, Marcus Monticelli, Dan Walmer, Sham Dixit, Clay Widmayer, Justin Wolfe, Jeff Bude, Kelly McCarty, Jean-Michel DiNicola

Proceedings Volume 7916, 79160H (2011) https://doi.org/10.1117/12.875794

KEYWORDS: National Ignition Facility, Liquid crystals, Beam shaping, Liquid crystal on silicon, Laser systems engineering, Optical amplifiers, Light valves, Silicon, Oxides, Relays

Read Abstract +

Proceedings Article | 2 December 2010 Paper

A programmable beam shaping system for tailoring the profile of high fluence laser beams

John Heebner, Michael Borden, Phil Miller, Chris Stolz, Tayyab Suratwala, Paul Wegner, Mark Hermann, Mark Henesian, Christopher Haynam, Steve Hunter, Kim Christensen, Nan Wong, Lynn Seppala, Gordon Brunton, Eddy Tse, Abdul Awwal, Mark Franks, Ed Marley, Kevin Williams, Michael Scanlan, Tracy Budge, Marcus Monticelli, Dan Walmer, Sham Dixit, Clay Widmayer, Justin Wolfe, Jeff Bude, Kelly McCarty, Jean-Michel DiNicola

Proceedings Volume 7842, 78421C (2010) https://doi.org/10.1117/12.867728

KEYWORDS: Adaptive optics, Beam shaping, Liquid crystals, Liquid crystal on silicon, Light valves, Modulation, Wavefront distortions, National Ignition Facility, Custom fabrication, Fusion energy

Read Abstract +

Proceedings Article | 21 February 2005 Paper

Performance of thin borosilicate glass sheets at 351 nm

Pamela Whitman, Douglas Hahn, Thomas Soules, Mary Norton, Sham Dixit, Eugene Donohue, James Folta, William Hollingsworth, Mark Maienschein-Cline

Proceedings Volume 5647, (2005) https://doi.org/10.1117/12.585946

KEYWORDS: Glasses, Iron, Absorption, National Ignition Facility, Borosilicate glass, Transmittance, Near field optics, Pulsed laser operation, Fusion energy, Laser irradiation

Read Abstract +

Proceedings Article | 10 June 2004 Paper

Magnetorheological finishing for imprinting continuous-phase plate structures onto optical surfaces

Joseph Menapace, Sham Dixit, Francois Genin, Wayne Brocious

Proceedings Volume 5273, (2004) https://doi.org/10.1117/12.527822

KEYWORDS: Magnetorheological finishing, Surface finishing, Polishing, Interferometry, Optics manufacturing, Photovoltaics, National Ignition Facility, Silica, Manufacturing, Wavefronts

Read Abstract +

Proceedings Article | 28 May 2004 Paper

NIF final optics system: frequency conversion and beam conditioning

Paul Wegner, Jerome Auerbach, Thomas Biesiada, Sham Dixit, Janice Lawson, Joseph Menapace, Thomas Parham, David Swift, Pamela Whitman, Wade Williams

Proceedings Volume 5341, (2004) https://doi.org/10.1117/12.538481

KEYWORDS: Crystals, National Ignition Facility, Frequency conversion, Diagnostics, Polarization, Optical fiber cables, Speckle, Optical fabrication, Frequency converters, Laser crystals

Read Abstract +

Proceedings Article | 18 December 2002 Paper

Eyeglass: a very large aperture diffractive space telescope

Roderick Hyde, Shamasundar Dixit, Andrew Weisberg, Michael Rushford

Proceedings Volume 4849, (2002) https://doi.org/10.1117/12.460420

KEYWORDS: Space telescopes, Glasses, Telescopes, Eyeglasses, Tolerancing, Silica, Polymers, Space operations, Relays, Optical instrument design

Read Abstract +

Proceedings Article | 6 June 2002 Paper

Design and Installation of a static wavefront correction optic on the HELEN laser

Thomas Bett, N. Hopps, Michael Rushford, Jerald Britten, Curly Hoaglan, Sham Dixit

Proceedings Volume 4629, (2002) https://doi.org/10.1117/12.469497

KEYWORDS: Wavefronts, Optical amplifiers, Optical calibration, Interferometers, Etching, Fringe analysis, Wet etching, Modulation, Glasses, Laser glasses

Read Abstract +

Proceedings Article | 9 April 2002 Paper

Performance of thin borosilicate glass sheets at 351 nm

Pamela Whitman, Michael Staggs, Christopher Carr, Sham Dixit, Walter Sell, David Milam

Proceedings Volume 4679, (2002) https://doi.org/10.1117/12.461722

KEYWORDS: Absorption, Transmittance, Borosilicate glass, Glasses, Fusion energy, Zinc, Laser optics, Ultraviolet radiation, Photodiodes, Gaussian beams

Read Abstract +

Proceedings Article | 27 December 2001 Paper

Wet-etch figuring: optical surfacing by controlled application of etchant solution using the Marangoni effect

Michael Rushford, Jerald Britten, Curly Hoaglan, Ian Thomas, Leslie Summers, Sham Dixit

Proceedings Volume 4451, (2001) https://doi.org/10.1117/12.453623

KEYWORDS: Glasses, Etching, Wavefronts, Liquids, Control systems, Polishing, Surface finishing, Interferometry, Optics manufacturing, Process control

Read Abstract +

Proceedings Article | 9 November 2001 Paper

Fabrication and applications of large-aperture diffractive optics

Sham Dixit, Jerald Britten, Roderick Hyde, Curly Hoaglan, Michael Rushford, Leslie Summers, John Toeppen

Proceedings Volume 4440, (2001) https://doi.org/10.1117/12.448029

KEYWORDS: Diffraction gratings, Space telescopes, Fresnel lenses, Lithography, Photoresist materials, Silica, High power lasers, Coating, Telescopes, Laser induced damage

Read Abstract +

Proceedings Article | 9 November 2001 Paper

Development of static phase control elements for high-power solid state lasers

Thomas Bett, Andrew Barnes, N. Hopps, Mohammad Taghizadeh, Andrew Waddie, P. Rudman, M. Thompson, Michael Rushford, Jerald Britten, Curly Hoaglan, Sham Dixit

Proceedings Volume 4440, (2001) https://doi.org/10.1117/12.448028

KEYWORDS: Wavefronts, Etching, Chemical elements, High power lasers, Optical amplifiers, Wet etching, Process control, Photoresist materials, Solid state lasers, Lithography

Read Abstract +

Proceedings Article | 23 July 1999 Paper

Management of unconverted light for the National Ignition Facility target chamber

Pamela Whitman, Alan Burnham, Mary Norton, Francois Genin, J. Scott, Wilthea Hibbard, K. Bletzer, Andrew Anderson, Sham Dixit

Proceedings Volume 3492, (1999) https://doi.org/10.1117/12.354186

KEYWORDS: Glasses, Silica, X-rays, Laser ablation, National Ignition Facility, Contamination, Laser induced damage, Prototyping, Absorption, Transmittance

Read Abstract +

Proceedings Article | 7 April 1999 Paper

Manufacture, optical performance, and laser damage characteristics of diffractive optics for the National Ignition Facility

Jerald Britten, Steve Herman, Leslie Summers, Michael Rushford, Lun Auyang, I. Barton, Bruce Shore, Sham Dixit, Thomas Parham, Curly Hoaglan, Charles Thompson, Colin Battersby, J. Yoshiyama, Ron Mouser

Proceedings Volume 3578, (1999) https://doi.org/10.1117/12.344461

KEYWORDS: National Ignition Facility, Optics manufacturing, Sol-gels, Etching, Diffraction gratings, Modulation, Diffraction, Optical coatings, Silica, Laser induced damage

Read Abstract +