Dr. Jeffrey E. Ungar Profile

Dr. Jeffrey E. Ungar

President & CEO at QPC Lasers Inc

SPIE Involvement:

Author

Publications (18)

Proceedings Article | 15 February 2012 Paper

Crystalline fiber Ho3+:YAG laser resonantly pumped by high-spectral-brightness laser diodes

Antoine Berrou, Thierry Ibach, Martin Schellhorn, Wentao Hu, Robert Lammert, Laurent Vaissié, Jeff Ungar, Marc Eichhorn

Proceedings Volume 8235, 823518 (2012) https://doi.org/10.1117/12.906657

KEYWORDS: Diodes, Crystals, Laser crystals, Semiconductor lasers, Fiber lasers, Output couplers, Reflectivity, Absorption, Mirrors, YAG lasers

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Proceedings Article | 9 February 2012 Paper

High-efficiency high-brightness diode lasers at 1470 nm/1550 nm for medical and defense applications

Kendra Gallup, Jeff Ungar, Laurent Vaissie, Rob Lammert, Wentao Hu

Proceedings Volume 8241, 82410R (2012) https://doi.org/10.1117/12.905274

KEYWORDS: Semiconductor lasers, Laser vision correction, Laser therapeutics, Surgery, Laser applications, Defense and security, Laser development, Diodes, Veins, High power lasers

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Proceedings Article | 3 April 2010 Paper

A GPU-based full-chip inverse lithography solution for random patterns

Ilhami Torunoglu, Ahmet Karakas, Erich Elsen, Curtis Andrus, Brandon Bremen, Boris Dimitrov, Jeffrey Ungar

Proceedings Volume 7641, 764115 (2010) https://doi.org/10.1117/12.846638

KEYWORDS: Photomasks, Lithography, Manufacturing, Process modeling, Semiconducting wafers, Logic, Optimization (mathematics), 3D modeling, Algorithm development, Light sources

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Proceedings Article | 7 May 2009 Paper

Ultracompact visible R-G-B lasers for defense applications

Wentao Hu, Xiaodong Yang, Chun Wang, Yossi Gewirtz, Mark Osowski, Robert Lammert, Se Oh, Victor Elarde, Laurent Vaissie, Falgun Patel, Paul Rudy, Jeffrey Ungar

Proceedings Volume 7325, 73250Q (2009) https://doi.org/10.1117/12.818072

KEYWORDS: Semiconductor lasers, Diodes, Laser applications, High power lasers, Defense and security, Crystals, Continuous wave operation, Laser marking, RGB color model, Laser development

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Proceedings Article | 7 May 2009 Paper

High-power semiconductor lasers at eye-safe wavelengths

Mark Osowski, Yossi Gewirtz, Robert Lammert, Se Oh, Chameli Panja, Victor Elarde, Laurent Vaissie, Falgun Patel, Jeffrey Ungar

Proceedings Volume 7325, 73250V (2009) https://doi.org/10.1117/12.818067

KEYWORDS: Semiconductor lasers, High power lasers, Diodes, Laser applications, Fiber lasers, Fabry–Perot interferometers, Collimation, Weapons, LIDAR

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Proceedings Article | 24 February 2009 Paper

Reliability of single-mode and multi-mode high-power semiconductor lasers at eye-safe wavelengths

T. Stakelon, J. Lucas, M. Osowski, R. Lammert, S. Moon, C. Panja, V. Elarde, K. Gallup, W. Hu, J. Ungar

Proceedings Volume 7198, 719819 (2009) https://doi.org/10.1117/12.807881

KEYWORDS: Semiconductor lasers, Reliability, High power lasers, Diodes, Fabry–Perot interferometers, High power fiber amplifiers, Optical amplifiers, Absorption, Semiconductor optical amplifiers, Laser applications

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Proceedings Article | 24 February 2009 Paper

High-spectral brightness pump sources for diode-pumped solid state lasers

Wentao Hu, Falgun Patel, Mark Osowski, Robert Lammert, Se Oh, Chameli Panja, Victor Elarde, Laurent Vaissié, Jeffrey Ungar

Proceedings Volume 7198, 71981R (2009) https://doi.org/10.1117/12.805096

KEYWORDS: Diodes, Semiconductor lasers, Diode pumped solid state lasers, Solid state lasers, Fiber lasers, Absorption, High power lasers, Continuous wave operation, Laser systems engineering

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Proceedings Article | 7 October 2008 Paper

High-power single-mode eye-safe wavelength semiconductor lasers

M. Osowski, W. Hu, R. Lammert, S. Oh, P. Rudy, R. Boehm, T. Stakelon, L. Vaissie, J. Ungar

Proceedings Volume 7114, 71140Q (2008) https://doi.org/10.1117/12.800820

KEYWORDS: Semiconductor lasers, Fiber couplers, Diodes, High power lasers, Nonabsorbing mirrors, Fabry–Perot interferometers, Fiber lasers, Waveguides, Second-harmonic generation, Near infrared

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Proceedings Article | 14 April 2008 Paper

Advances in high-brightness semiconductor lasers

M. Osowski, W. Hu, R. Lammert, S. Oh, P. Rudy, T. Stakelon, L. Vaissie, J. Ungar

Proceedings Volume 6952, 695208 (2008) https://doi.org/10.1117/12.777065

KEYWORDS: Semiconductor lasers, Fiber couplers, Diodes, High power lasers, Nonabsorbing mirrors, Laser applications, Fabry–Perot interferometers, Fiber lasers, Waveguides, Second-harmonic generation

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Proceedings Article | 13 February 2008 Paper

Advances in high-brightness semiconductor lasers

M. Osowski, W. Hu, R. Lammert, S. Oh, P. Rudy, T. Stakelon, J. Ungar

Proceedings Volume 6876, 68761E (2008) https://doi.org/10.1117/12.763434

KEYWORDS: Semiconductor lasers, Fiber couplers, Diodes, High power lasers, Fiber coupled lasers, Fiber lasers, Nonabsorbing mirrors, Fabry–Perot interferometers, Waveguides, Second-harmonic generation

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Proceedings Article | 10 May 2007 Paper

High brightness semiconductor lasers at 1300-1600 nm

M. Osowski, R. Lammert, S. Oh, W. Hu, C. Panja, P. Rudy, T. Stakelon, J. Ungar

Proceedings Volume 6552, 655213 (2007) https://doi.org/10.1117/12.719396

KEYWORDS: Semiconductor lasers, High power lasers, Laser development, Diodes, Fabry–Perot interferometers, Fiber couplers, Er:YAG lasers, Laser optics, Fiber coupled lasers, Optical design

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Proceedings Article | 10 May 2007 Paper

High brightness semiconductor lasers from 780-1064-nm

R. Lammert, W. Hu, S. Oh, M. Osowski, C. Panja, P. Rudy, T. Stakelon, J. Ungar

Proceedings Volume 6552, 655212 (2007) https://doi.org/10.1117/12.719367

KEYWORDS: Semiconductor lasers, Fiber couplers, High power lasers, Diodes, High power diode lasers, Waveguides, Nonabsorbing mirrors, Fiber lasers, Near infrared, Semiconductors

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Proceedings Article | 14 February 2007 Paper

High-brightness semiconductor lasers

M. Osowski, W. Hu, R. Lammert, T. Liu, Y. Ma, S. Oh, C. Panja, P. Rudy, T. Stakelon, J. Ungar

Proceedings Volume 6456, 64560D (2007) https://doi.org/10.1117/12.701331

KEYWORDS: Semiconductor lasers, Fabry–Perot interferometers, High power lasers, Fiber couplers, Waveguides, Diodes, Near infrared, Laser development, Laser optics, Fiber Bragg gratings

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Proceedings Article | 12 May 2006 Paper

Advances in high-brightness high-power semiconductor lasers

R. Lammert, S. Oh, M. Osowski, C. Panja, P. Rudy, T. Stakelon, J. Ungar

Proceedings Volume 6216, 62160B (2006) https://doi.org/10.1117/12.666259

KEYWORDS: Semiconductor lasers, High power lasers, Diodes, Fiber Bragg gratings, Fabry–Perot interferometers, Mirrors, Laser systems engineering, Laser applications, Reliability, Waveguides

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Proceedings Article | 12 May 2006 Paper

Monolithic semiconductor mid-IR optical parametric oscillators with modal phase matching

R. Lammert, S. Oh, M. Osowski, C. Panja, P. Rudy, T. Stakelon, J. Ungar

Proceedings Volume 6216, 62160P (2006) https://doi.org/10.1117/12.666294

KEYWORDS: Mid-IR, Optical parametric oscillators, Waveguides, Semiconductor lasers, Semiconductors, Continuous wave operation, Optical semiconductors, Nonlinear crystals, Phase matching

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Proceedings Article | 15 February 2006 Paper

Advances in high brightness semiconductor lasers

R. Lammert, S. Oh, M. Osowski, C. Panja, P. Rudy, T. Stakelon, J. Ungar

Proceedings Volume 6104, 61040I (2006) https://doi.org/10.1117/12.651148

KEYWORDS: Semiconductor lasers, High power lasers, Diodes, Fiber Bragg gratings, Fabry–Perot interferometers, Mirrors, Reliability, Waveguides, High power diode lasers, Materials processing

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Proceedings Article | 10 September 2005 Paper

Advances in semiconductor laser bars and arrays

R. Lammert, S. Oh, M. Osowski, C. Panja, D. Qian, P. Rudy, T. Stakelon, J. Ungar

Proceedings Volume 5887, 58870B (2005) https://doi.org/10.1117/12.620400

KEYWORDS: Semiconductor lasers, Diodes, High power lasers, Mirrors, Laser development, Reliability, Waveguides, High power diode lasers, Materials processing, Solid state lasers

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Proceedings Article | 26 June 1992 Paper

High-power single-mode strained-layer lasers emitting at 980 nm

Hal Zarem, Joel Paslaski, Michael Mittelstein, Jeffrey Ungar, Israel Ury

Proceedings Volume 1634, (1992) https://doi.org/10.1117/12.59146

KEYWORDS: High power lasers, Fiber lasers, Laser development, Fiber amplifiers, Single mode fibers, Semiconductor lasers, Indium gallium arsenide, Laser applications, Reflectivity, GRIN lenses

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Showing 5 of 18 publications

Conference Committee Involvement (2)

Semiconductor Lasers and Applications IV

18 October 2010 | Beijing, China

Semiconductor Lasers and Applications III

12 November 2007 | Beijing, China

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