Mr. Russell B. Wilcox Profile

Russell B. Wilcox

Engineer at Lawrence Berkeley National Lab

SPIE Involvement:

Author

Publications (20)

Proceedings Article | 13 March 2024 Presentation

Presentation

Ultra-broadband coherent pulse stacking of Yb fiber amplified ultrashort pulses

Tong Zhou, Lauren Cooper, Qiang Du, Dan Wang, Mathew Whittlesey, John Ruppe, Siyun Chen, Deepak Sapkota, Mahek Logantha, Jean-Luc Vay, Derun Li, Carl Schroeder, Jeroen van Tilborg, Eric Esarey, Russell Wilcox, Almantas Galvanauskas, Cameron Geddes

Proceedings Volume PC12865, PC1286503 (2024) https://doi.org/10.1117/12.3003174

KEYWORDS: Ultrafast phenomena, Fiber amplifiers, Ytterbium, Fiber lasers, Beam path, Mirrors, Laser applications, Interferometers, Commercial off the shelf technology

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Proceedings Article | 9 March 2023 Presentation

Presentation

All-fiber integrated 85um core chirally-coupled core fiber high energy amplifiers for compact coherently combined laser arrays

Mingshu Chen, Alexander Rainville, Manoj Kanskar, Jim Zhang, Ossi Kimmelma, Arto Nieminen, Donald Sipes, Brian Schulz, Carson Shollenbarger, Tong Zhou, Russell Wilcox, Almantas Galvanauskas

Proceedings Volume 12400, 124000I (2023) https://doi.org/10.1117/12.2650915

KEYWORDS: Fiber amplifiers, Current controlled current source, Fiber lasers, Optical amplifiers, Ultrafast phenomena, Structured optical fibers, Pulsed laser operation, Prototyping, Plasma generation, Plasma

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Proceedings Article | 9 March 2023 Presentation

Presentation

55-fs pulses from a spectrally combined fiber laser system via coherent spectral synthesis of two pulse shapers

Siyun Chen, Qiang Du, Dan Wang, Antonio Gilardi, Lauren Cooper, Mahek Logantha, Jeroen van Tilborg, Carl Schroeder, Eric Esarey, Derun Li, Cameron Geddes, Russell Wilcox, Tong Zhou

Proceedings Volume 12400, 124000D (2023) https://doi.org/10.1117/12.2649471

KEYWORDS: Fiber lasers, Laser systems engineering, Mirrors, Fiber amplifiers, Amplifiers, Ytterbium, Pulse shaping, Photonic crystal fibers, Phase measurement, Oscillators

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Proceedings Article | 4 March 2022 Presentation + Paper

Presentation + Paper

Diffractive combining and control of femtosecond pulse beam arrays

Russell Wilcox, Tong Zhou, Qiang Du, Dan Wang, Antonio Gilardi, Siyun Chen, Derun Li

Proceedings Volume 11981, 119810G (2022) https://doi.org/10.1117/12.2614781

KEYWORDS: Diffractive optical elements, Beam splitters, Ultrafast phenomena, Spatial light modulators, Diffraction gratings, Control systems, Machine learning

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Proceedings Article | 5 March 2021 Presentation

Presentation

Demonstration of complete gain-narrowing compensation for 100fs duration pulses with ~30nm bandwidth in Yb-doped fiber amplifier system with up to 150dB of total multi-stage gain

Siyun Chen, Mathew Whittlesey, Yifan Cui, Russell Wilcox, Almantas Galvanauskas

Proceedings Volume 11665, 1166514 (2021) https://doi.org/10.1117/12.2583328

KEYWORDS: Fiber amplifiers, Ultrafast phenomena, Optical filters, Amplifiers, Linear polarizers, Linear filtering, Electronic filtering, Control systems

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Proceedings Article | 14 March 2018 Presentation

Presentation

Near-complete stored energy extraction from fiber amplifiers in ultrashort >10mJ energy pulses using coherent pulse stacking amplification (Conference Presentation)

Hanzhang Pei, John Ruppe, Siyun Chen, Morteza Sheikhsofla, John Nees, Yawei Yang, Russell Wilcox, Wim Leemans, Almantas Galvanauskas

Proceedings Volume 10512, 1051209 (2018) https://doi.org/10.1117/12.2291303

KEYWORDS: Fiber amplifiers, Femtosecond phenomena, Modulation, Mode locking, Oscillators, Electrooptic modulators, Multiplexing, Ultrafast phenomena

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Proceedings Article | 14 March 2018 Presentation

Presentation

Scalable coherent beam combination of femtosecond pulses using a diffractive optic pair (Conference Presentation)

Tong Zhou, Tyler Sano, Dar Dahlen, Russell Wilcox

Proceedings Volume 10512, 105120A (2018) https://doi.org/10.1117/12.2291147

KEYWORDS: Diffractive optical elements, Fiber amplifiers, Coherent beam combination, Ultrafast lasers, Fiber lasers, High power lasers

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Proceedings Article | 21 April 2017 Presentation

Presentation

Multi-mJ energy extraction using Yb-fiber based coherent pulse stacking amplification of fs pulses (Conference Presentation)

John Ruppe, Hanzhang Pei, Siyun Chen, Morteza Sheikhsofla, Russell Wilcox, John Nees, Almantas Galvanauskas

Proceedings Volume 10083, 1008303 (2017) https://doi.org/10.1117/12.2253464

KEYWORDS: Current controlled current source, Standards development, Fiber amplifiers, Mode locking, Electrooptic modulators, Amplifiers, Multiplexing, Oscillators, Diffraction gratings, Modulation

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Proceedings Article | 18 February 2010 Paper

Paper

A 20fs synchronization system for lasers and cavities in accelerators and FELs

R. Wilcox, J. Byrd, L. Doolittle, G. Huang, J. Staples

Proceedings Volume 7581, 75810O (2010) https://doi.org/10.1117/12.846253

KEYWORDS: Receivers, Free electron lasers, Signal detection, Transmitters, Modulation, Interferometers, Continuous wave operation, Fiber lasers, Laser stabilization, Laser systems engineering

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Proceedings Article | 20 February 2007 Paper

Paper

A high-average power femtosecond laser for synchrotron light source applications

R. Wilcox, R. Schoenlein

Proceedings Volume 6451, 64510W (2007) https://doi.org/10.1117/12.708685

KEYWORDS: Crystals, Optical amplifiers, Mirrors, Synchrotrons, Laser crystals, Femtosecond phenomena, Light sources, Amplifiers, Oscillators, Diffraction gratings

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Proceedings Article | 10 November 2004 Paper

Paper

LUX: a design study for a linac-/laser-based ultrafast x-ray source

John Corlett, William Barletta, Stefano DeSantis, Larry Doolittle, William Fawley, Philip Heimann, Stephen Leone, Steven Lidia, Derun Li, Gregory Penn, Alex Ratti, Matheus Reinsch, Robert Schoenlein, John Staples, Gregory Stover, Steve Virostek, Weishi Wan, Russell Wells, Russell Wilcox, Andy Wolski, Jonathan Wurtele, Alexander Zholents

Proceedings Volume 5534, (2004) https://doi.org/10.1117/12.555946

KEYWORDS: X-rays, Free electron lasers, Ultrafast phenomena, Hard x-rays, Electron beams, Superconductors, Pulsed laser operation, Helium, X-ray optics, X-ray sources

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Proceedings Article | 23 July 1999 Paper

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

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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Proceedings Article | 23 July 1999 Paper

Paper

Optimization of the alignment sensitivity and energy stability of the NIF regenerative amplifier cavity

N. Hopps, Russell Wilcox, Mark Hermann, Mikael Martinez, Ernesto Padilla, John Crane

Proceedings Volume 3492, (1999) https://doi.org/10.1117/12.354251

KEYWORDS: Switches, National Ignition Facility, Diodes, Data modeling, Amplifiers, Iris, Head, Absorption, Temperature metrology, Optical amplifiers

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Proceedings Article | 8 December 1997 Paper

Paper

Amplitude and phase modulation with waveguide optics

Scott Burkhart, Russell Wilcox, Donald Browning, Frank Penko

Proceedings Volume 3047, (1997) https://doi.org/10.1117/12.294351

KEYWORDS: Oscillators, Modulators, Phase modulation, National Ignition Facility, Laser scattering, Microwave radiation, Electro optics, Electrooptic modulators, Optical amplifiers, Modulation

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Proceedings Article | 13 May 1997 Paper

Paper

Integrated optic modulator and splitter damage at 1053 nm

Russell Wilcox, Donald Browning

Proceedings Volume 2966, (1997) https://doi.org/10.1117/12.274274

KEYWORDS: Modulators, National Ignition Facility, Integrated optics, Epoxies, Fusion energy, Manufacturing, Single mode fibers, Fiber lasers, Fiber couplers, Waveguides

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Proceedings Article | 8 December 1995 Paper

Paper

National Ignition Facility front-end laser system

Scott Burkhart, Raymond Beach, John Crane, James Davin, Michael Perry, Russell Wilcox

Proceedings Volume 2633, (1995) https://doi.org/10.1117/12.228290

KEYWORDS: Optical amplifiers, Fiber amplifiers, Oscillators, National Ignition Facility, Fusion energy, Glasses, Laser systems engineering, Amplifiers, Modulation, Semiconductor lasers

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Proceedings Article | 8 December 1995 Paper

Paper

Four-color beam smoothing irradiation system for laser-plasma interaction experiments at LLNL

Deanna Pennington, Mark Henesian, Russell Wilcox, Timothy Weiland, David Eimerl, Robert Ehrlich, Curt Laumann, John Miller

Proceedings Volume 2633, (1995) https://doi.org/10.1117/12.228255

KEYWORDS: Fermium, Frequency modulation, Speckle, Picosecond phenomena, Diagnostics, Frequency conversion, Laser systems engineering, National Ignition Facility, Speckle pattern, Crystals

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A novel four-color beam smoothing scheme with a capability similar to that planned for the proposed National Ignition Facility has been deployed on the Nova laser, and has been successfully used for laser fusion experiments. Wavefront aberrations in high power laser systems produce nonuniformities in the energy distribution of the focal spot that can significantly degrade the coupling of energy into a fusion target, driving various plasma instabilities. The introduction of temporal and spatial incoherence over the face of the beam using techniques such as smoothing by spectral dispersion (SSD) can reduce these variations in the focal irradiance when averaged over a finite time interval. One of the limitations of beam smoothing techniques used to date with solid state laser systems has been the inability to efficiently frequency convert broadband pulses to the third harmonic (351 nm). To obtain high conversion efficiency, we developed a multiple frequency source that is spatially separated into four quadrants, each containing a different central frequency. Each quadrant is independently converted to the third harmonic in a four-segment Type I/Type II KDP crystal array with independent phase-matching for efficient frequency conversion. Up to 2.3 kJ of third harmonic light is generated in a 1 ns pulse, corresponding to up to 65% intrinsic conversion efficiency. SSD is implemented by adding limited frequency modulated bandwidth to each frequency component. This improves smoothing without significant impact on the frequency conversion process. The measured far field irradiance shows 25% rms intensity variation with four colors alone, and is calculated to reach this level within 3 ps. Smoothing by spectral dispersion is implemented during the spatial separation of the FM modulated beams to provide additional smoothing, reaching a 16% rms intensity variation level. Following activation the four-color system was successfully used to probe NIF-like plasmas, producing less than 1% SBS backscatter at greater than 2 multiplied by 10¹⁵ W/cm². This paper discusses the detailed implementation and performance of the segmented four-color system on the Nova laser system.

Proceedings Article | 1 May 1993 Paper

Paper

Fusion laser oscillator and pulse-forming system using integrated optics

Russell Wilcox, William Behrendt, Donald Browning, David Speck, Bruno Van Wonterghem

Proceedings Volume 1870, (1993) https://doi.org/10.1117/12.154489

KEYWORDS: Modulators, Oscillators, Optical amplifiers, Signal to noise ratio, Integrated optics, Modulation, Fiber amplifiers, Semiconductor lasers, Interference (communication), Fiber optics

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Proceedings Article | 1 May 1993 Paper

Paper

Compact and versatile pulse generation and shaping subsystem for high-energy laser systems

Bruno Van Wonterghem, David Speck, M. Norman, Russell Wilcox, Victor Karpenko, James Richards

Proceedings Volume 1870, (1993) https://doi.org/10.1117/12.154490

KEYWORDS: Optical amplifiers, Beam shaping, Fiber amplifiers, Spatial filters, Amplifiers, Oscillators, Pulsed laser operation, Polarizers, Modulation, Laser systems engineering

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Showing 5 of 20 publications

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