Dr. Joshua E. Rothenberg Profile

Dr. Joshua E. Rothenberg

Chief Scientist Directed Energy at Northrop Grumman Corp

SPIE Involvement:

Author

Publications (26)

Proceedings Article | 12 March 2024 Presentation + Paper

High-power coherent diode arrays

Joshua Rothenberg, Gregory Goodno

Proceedings Volume 12867, 128670J (2024) https://doi.org/10.1117/12.3009692

KEYWORDS: Diodes, Sensors, Diffractive optical elements, Phased arrays, Lens arrays, Phased array optics, Semiconductor lasers

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Proceedings Article | 11 March 2020 Presentation

Spectral brightness scaling of kW fiber amplifiers via nonlinear linewidth narrowing (Conference Presentation)

Gregory Goodno, Joshua Rothenberg

Proceedings Volume 11260, 1126004 (2020) https://doi.org/10.1117/12.2546728

KEYWORDS: Fiber amplifiers

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Proceedings Article | 13 February 2012 Paper

Coherent and spectral beam combining of fiber lasers

S. Augst, S. Redmond, C. Yu, D. Ripin, T. Fan, G. Goodno, P. Thielen, J. Rothenberg, A. Sanchez-Rubio

Proceedings Volume 8237, 823704 (2012) https://doi.org/10.1117/12.905759

KEYWORDS: Fiber lasers, Diffractive optical elements, Fiber amplifiers, Amplifiers, Near field, Diffraction gratings, Microlens array, Laser systems engineering, Phase measurement, Defense and security

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SPIE Journal Paper | 1 November 2011

Narrow linewidth power scaling and phase stabilization of 2-μm thulium fiber lasers

Gregory Goodno, Lewis Book, Joshua Rothenberg, Mark Weber, Stanley Weiss

OE, Vol. 50, Issue 11, 111608, (November 2011) https://doi.org/10.1117/12.10.1117/1.3631869

KEYWORDS: Thulium, Fiber lasers, Optical amplifiers, Fiber amplifiers, Absorption, Thin film coatings, Coating, Ytterbium, Cladding, Diodes

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Proceedings Article | 4 May 2010 Paper

Advances and limitations in beam combination of kilowatt fiber amplifiers

Joshua Rothenberg, Gregory Goodno

Proceedings Volume 7686, 768613 (2010) https://doi.org/10.1117/12.849488

KEYWORDS: Diffractive optical elements, Fiber amplifiers, Diffraction gratings, Beam splitters, Tolerancing, Diffraction, Optical amplifiers, Absorption, Dielectrics, Silica

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Proceedings Article | 19 February 2009 Paper

600-W single-mode single-frequency thulium fiber laser amplifier

Gregory Goodno, Lewis Book, Joshua Rothenberg

Proceedings Volume 7195, 71950Y (2009) https://doi.org/10.1117/12.809765

KEYWORDS: Fiber lasers, Amplifiers, Fiber amplifiers, Thin film coatings, Absorption, Optical amplifiers, Visibility, Coating, YAG lasers, Single mode fibers

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Proceedings Article | 25 February 2008 Paper

Passive coherent phasing of fiber laser arrays

Joshua Rothenberg

Proceedings Volume 6873, 687315 (2008) https://doi.org/10.1117/12.774569

KEYWORDS: Fiber amplifiers, Fiber lasers, Phase shifts, Optical amplifiers, Laser resonators, Phased arrays, Amplifiers, Complex systems, Fiber coupled lasers, Statistical analysis

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Proceedings Article | 22 February 2008 Paper

Suppression of stimulated Brillouin scattering in single-frequency multi-kilowatt fiber amplifiers

Joshua Rothenberg, Peter Thielen, Michael Wickham, Charles Asman

Proceedings Volume 6873, 68730O (2008) https://doi.org/10.1117/12.774714

KEYWORDS: Fiber amplifiers, Scattering, Fiber Bragg gratings, Acousto-optics, Amplifiers, Fiber lasers, Lead, Acoustics, Waveguides, Reliability

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Proceedings Article | 20 January 2006 Paper

Near field diffraction of phase-shifted phase grating for side-writing fiber Bragg gratings

Yunlong Sheng, Li Sun, Joshua Rothenberg, Hongpu Li, Ying Wang

Proceedings Volume 6027, 602707 (2006) https://doi.org/10.1117/12.667703

KEYWORDS: Fiber Bragg gratings, Phase shifts, Photomasks, Diffraction gratings, Phase shift keying, Near field diffraction, Finite-difference time-domain method, Modulation, Diffraction, Binary data

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Proceedings Article | 7 February 2005 Paper

Split of phase shifts in phase mask for proximity side-writing fiber Bragg gratings

Yunlong Sheng, Joshua Rothenberg, Hongpu Li, Ying Wang

Proceedings Volume 5636, (2005) https://doi.org/10.1117/12.569024

KEYWORDS: Phase shifts, Fiber Bragg gratings, Photomasks, Near field, Phase shift keying, Optical design, Binary data, Error analysis, Diffraction, Finite-difference time-domain method

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Proceedings Article | 11 January 2005 Paper

Design and fabrication of complex fiber Bragg gratings using diffractive optics technology

Yunlong Sheng, Joshua Rothenberg, Hongpu Li

Proceedings Volume 5642, (2005) https://doi.org/10.1117/12.569816

KEYWORDS: Fiber Bragg gratings, Phase shift keying, Phase shifts, Optical design, Modulation, Near field optics, Reflectivity, Fourier transforms, Diffraction, Binary data

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Proceedings Article | 7 June 2002 Paper

FBG-based widely tunable multichannel chromatic dispersion compensation for DWDM communications systems

Yao Li, Joshua Rothenberg

Proceedings Volume 4653, (2002) https://doi.org/10.1117/12.469648

KEYWORDS: Fiber Bragg gratings, Dispersion, Reflectivity, Modulation, Temperature metrology, Wavelength division multiplexing, Dense wavelength division multiplexing, Telecommunications, Interferometers, Picosecond phenomena

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Proceedings Article | 8 November 2001 Paper

Fiber Bragg gratings for tunable compensation of chromatic dispersion and slope in broadband WDM communication systems

Joshua Rothenberg

Proceedings Volume 4534, (2001) https://doi.org/10.1117/12.448002

KEYWORDS: Fiber Bragg gratings, Wavelength division multiplexing, Telecommunications, Optical communications, Dispersion, Modulation, Transmitters, Single mode fibers, Multiplexing, Reflectivity

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Proceedings Article | 11 January 2000 Paper

Mercury and beyond: diode-pumped solid state lasers for inertial fusion energy

Camille Bibeau, Raymond Beach, Andy Bayramian, Jean-Christophe Chanteloup, Christopher Ebbers, Mark Emanuel, Charles Orth, Joshua Rothenberg, Kathleen Schaffers, Jay Skidmore, Steven Sutton, Luis Zapata, Stephen Payne, Howard Powell

Proceedings Volume 3886, (2000) https://doi.org/10.1117/12.375148

KEYWORDS: Crystals, Diodes, Mercury, Semiconductor lasers, Fusion energy, Head, Diode pumped solid state lasers, Laser systems engineering, Laser crystals, Optical amplifiers

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Proceedings Article | 23 July 1999 Paper

Issue of FM to AM conversion on the National Ignition Facility

Joshua Rothenberg, Donald Browning, Russell Wilcox

Proceedings Volume 3492, (1999) https://doi.org/10.1117/12.354253

KEYWORDS: Frequency modulation, Amplitude modulation, National Ignition Facility, Fermium, Phase modulation, Modulation, Laser scattering, Scattering, Laser optics, Speckle pattern

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Proceedings Article | 23 July 1999 Paper

Polarization smoothing for the National Ignition Facility

Joshua Rothenberg

Proceedings Volume 3492, (1999) https://doi.org/10.1117/12.354250

KEYWORDS: Polarization, Picosecond phenomena, Speckle pattern, Spatial frequencies, Speckle, Birefringence, Modulation, Near field, National Ignition Facility, Solids

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Proceedings Article | 23 July 1999 Paper

Implementation of smoothing by spectral dispersion on Beamlet and NIF

Joshua Rothenberg, Jerome Auerbach, Bryan Moran, James Murray, Timothy Weiland, Paul Wegner

Proceedings Volume 3492, (1999) https://doi.org/10.1117/12.354249

KEYWORDS: Modulators, Near field, National Ignition Facility, Spatial filters, Modulation, Speckle pattern, Fermium, Frequency modulation, Solids, Phase matching

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Proceedings Article | 23 July 1999 Paper

Integrated operations of the National Ignition Facility (NIF) optical pulse generation development system

John Crane, Russell Wilcox, N. Hopps, Donald Browning, Mikael Martinez, Bryan Moran, Frank Penko, Joshua Rothenberg, Mark Henesian, C. Brent Dane, Lloyd Hackel

Proceedings Volume 3492, (1999) https://doi.org/10.1117/12.354218

KEYWORDS: Optical amplifiers, National Ignition Facility, Beam shaping, Fermium, Frequency modulation, Amplifiers, Modulators, Spatial filters, Laser systems engineering, Modulation

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