Dr. Benjamin G. Ward Profile

Dr. Benjamin G. Ward

Deputy Dept Chief at Defense Threat Reduction Agency

SPIE Involvement:

Author

Publications (20)

Proceedings Article | 5 March 2021 Presentation + Paper

BPM study of pump modulation effects on mode instability

Benjamin Ward

Proceedings Volume 11665, 1166510 (2021) https://doi.org/10.1117/12.2577755

KEYWORDS: Modulation, Beam propagation method, Fiber amplifiers, Optical amplifiers, Phase shift keying, Optical simulations, Laser optics

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Proceedings Article | 21 February 2020 Paper

Mode Instability in coiled fiber amplifiers

Benjamin Ward

Proceedings Volume 11260, 1126016 (2020) https://doi.org/10.1117/12.2541977

KEYWORDS: Optical amplifiers, Fiber amplifiers, Cladding, Amplifiers, Beam propagation method, Signal processing, Optical filters, Signal attenuation, Polarization, Absorption

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Proceedings Article | 26 February 2018 Paper

Finite element BPM fiber modal instability modeling

Benjamin Ward

Proceedings Volume 10512, 1051220 (2018) https://doi.org/10.1117/12.2290312

KEYWORDS: Amplifiers, Beam propagation method, Chemical elements, Fiber amplifiers, Optical amplifiers, Step index fibers, Fourier transforms, Photonic crystal fibers, Waveguides, Absorption

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Proceedings Article | 22 February 2017 Paper

Power scaling of a hybrid microstructured Yb-doped fiber amplifier

Cody Mart, Benjamin Pulford, Benjamin Ward, Iyad Dajani, Thomas Ehrenreich, Brian Anderson, Khanh Kieu, Tony Sanchez

Proceedings Volume 10083, 100830X (2017) https://doi.org/10.1117/12.2249863

KEYWORDS: Fiber amplifiers, Photonic crystals, Silica, Scattering, Photonic crystal fibers, Amplifiers, Optical amplifiers, Ytterbium, Diagnostics, Polarization, Structured optical fibers, Cladding

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Proceedings Article | 9 March 2016 Paper

Accurate modeling of rod-type photonic crystal fiber amplifiers

Benjamin Ward

Proceedings Volume 9728, 97280F (2016) https://doi.org/10.1117/12.2214477

KEYWORDS: Amplifiers, Photonic crystal fibers, Fiber lasers, Fiber amplifiers, Structured optical fibers, Laser amplifiers, Chaos, Rayleigh scattering, Thermal optics, Feedback loops, Absorption, Doping, Waveguides, Distortion, Ions

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Proceedings Article | 7 March 2014 Paper

Numerical analysis of modal instability onset in fiber amplifiers

Benjamin Ward

Proceedings Volume 8961, 89611U (2014) https://doi.org/10.1117/12.2038648

KEYWORDS: Optical amplifiers, Fiber amplifiers, Thermography, Beam propagation method, Cladding, Numerical analysis, Photons, Fiber lasers, Rayleigh scattering, Wave propagation

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Proceedings Article | 22 March 2013 Paper

Numerical studies of modal instabilities in high-power fiber amplifiers

Shadi Naderi, Iyad Dajani, Timothy Madden, Bemjamin Ward, Craig Robin, Jake Grosek

Proceedings Volume 8601, 86013F (2013) https://doi.org/10.1117/12.2006571

KEYWORDS: Fiber amplifiers, Ytterbium, Thermal effects, Optical simulations, Optical amplifiers, Polarization, High power fiber amplifiers, Near field, Refraction, Absorption

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Proceedings Article | 15 March 2013 Paper

Experimental and theoretical investigations of single-frequency Raman fiber amplifiers operating at 1178 nm

Iyad Dajani, Christopher Vergien, Benjamin Ward, Craig Robin, Shadi Naderi, Angel Flores, Jean-Claude Diels

Proceedings Volume 8604, 86040N (2013) https://doi.org/10.1117/12.2006946

KEYWORDS: Radiofrequency ablation, Raman spectroscopy, Fiber amplifiers, Wavelength division multiplexing, Phase modulation, Fiber lasers, Sodium, Second-harmonic generation, Amplifiers, Optical amplifiers

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Proceedings Article | 8 November 2012 Paper

Monolithic eye-safer photonic crystal fiber lasers and amplifiers

Chad Carlson, Benjamin Ward, Donald Sipes, Jason Tafoya

Proceedings Volume 8547, 85470P (2012) https://doi.org/10.1117/12.974668

KEYWORDS: Optical fibers, Optical amplifiers, Amplifiers, Fiber amplifiers, Cladding, Photonic crystal fibers, Phase modulation, Diodes, Erbium, Semiconductor lasers

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Proceedings Article | 23 February 2012 Paper

Advanced components for multi-kW fiber lasers

Donald Sipes, Jason Tafoya, Daniel Schulz, Benjamin Ward, Chad Carlson

Proceedings Volume 8237, 82370P (2012) https://doi.org/10.1117/12.909337

KEYWORDS: Fiber amplifiers, Fiber lasers, Semiconductor lasers, Optical amplifiers, Amplifiers, Phase modulation, Fiber couplers, High power fiber amplifiers, Diffraction, Signal attenuation

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Proceedings Article | 23 February 2012 Paper

1.5-micron MOPA deep space downlink transmitter

Donald Sipes, Jason Tafoya, Daniel Schulz, Benjamin Ward, Chad Carlson

Proceedings Volume 8246, 82460J (2012) https://doi.org/10.1117/12.909444

KEYWORDS: Optical amplifiers, Transmitters, Erbium, Fiber amplifiers, Fiber lasers, Absorption, High power fiber amplifiers, Photonic crystal fibers, Modulation, High power lasers

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Proceedings Article | 16 February 2012 Paper

Gain-tailored SBS suppressing photonic crystal fibers for high power applications

Craig Robin, Iyad Dajani, Clint Zeringue, Benjamin Ward, Ann Lanari

Proceedings Volume 8237, 82371D (2012) https://doi.org/10.1117/12.910324

KEYWORDS: Fiber amplifiers, Optical amplifiers, Acoustics, Photonic crystal fibers, Absorption, Phase modulation, Cladding, Amplifiers, Laser applications, Laser scattering

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Proceedings Article | 17 February 2010 Paper

A monolithic pump signal multiplexer for air-clad photonic crystal fiber amplifiers

Benjamin Ward, Donald Sipes, Jason Tafoya

Proceedings Volume 7580, 75801C (2010) https://doi.org/10.1117/12.845769

KEYWORDS: Photonic crystal fibers, Cladding, Signal attenuation, Multiplexers, Polarization, Fiber lasers, Capillaries, Signal processing, Fiber amplifiers, Refractive index

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Proceedings Article | 17 February 2010 Paper

Photonic crystal fiber with resonant-coupling higher-order-mode suppression

Benjamin Ward, Dallas Wright, Casey Eicholt, Chad Carlson

Proceedings Volume 7580, 758011 (2010) https://doi.org/10.1117/12.845599

KEYWORDS: Optical fibers, Photonic crystal fibers, Fiber lasers, Cladding, Step index fibers, Scattering, Superluminescent sources, Near field optics, Laser applications, Laser scattering

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Proceedings Article | 19 February 2009 Paper

Brillouin gain in optical fibers with inhomogeneous acoustic velocity

Benjamin Ward, Justin Spring

Proceedings Volume 7195, 71951J (2009) https://doi.org/10.1117/12.812882

KEYWORDS: Acoustics, Wave propagation, Reflectivity, Oscillators, Scattering, Fiber amplifiers, Optical fibers, Nonlinear optics, Step index fibers, Glasses

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Proceedings Article | 20 February 2007 Paper

Photonic crystal fiber designs for power scaling of single-polarization amplifiers

Benjamin Ward, Craig Robin, Marc Culpepper

Proceedings Volume 6453, 645307 (2007) https://doi.org/10.1117/12.717326

KEYWORDS: Photonic crystal fibers, Chemical elements, Photonic crystals, Birefringence, Refractive index, Refraction, Cladding, Optical fibers, Polarization, Fiber amplifiers

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Proceedings Article | 6 September 2006 Paper

First experimental demonstration of self-synchronous locking of optical coherence by single-detector electronic-frequency tagging of fiber amplifiers

T. Shay, Vincent Benham, J. Baker, Benjamin Ward, Anthony Sanchez, Mark Culpepper, D. Pilkington, Justin Spring, Douglas Nelson, Chunte Lu

Proceedings Volume 6304, 63040W (2006) https://doi.org/10.1117/12.678425

KEYWORDS: Phase shift keying, Optical components, Mode locking, Fiber amplifiers, Phase measurement, Modulation, Photodetectors, Phase modulation, Signal processing, Optical arrays

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Proceedings Article | 23 February 2006 Paper

The effect of macro-bending on phasing in 6 and 7-core large mode area photonic crystal fibers

Benjamin Ward

Proceedings Volume 6102, 61021D (2006) https://doi.org/10.1117/12.646273

KEYWORDS: Photonic crystal fibers, Polarization, Photonic crystals, Fiber lasers, Amplifiers, Laser applications, Refraction, Mode locking, Analytical research, Continuous wave operation

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Proceedings Article | 23 February 2006 Paper

Self-referenced locking of optical coherence by single-detector electronic-frequency tagging

T. Shay, Vincent Benham, Justin Spring, Benjamin Ward, F. Ghebremichael, Mark Culpepper, Anthony Sanchez, J. Baker, D. Pilkington, Richard Berdine

Proceedings Volume 6102, 61020V (2006) https://doi.org/10.1117/12.646634

KEYWORDS: Photodetectors, Mode locking, Modulation, Phase shift keying, Phase measurement, Optical components, Phased array optics, Optical arrays, Modulators, Fiber lasers

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Proceedings Article | 22 April 2005 Paper

Comparison of stimulated Brillouin scattering thresholds and spectra in nonpolarization-maintaining and polarization-maintaining passive fibers

Justin Spring, Timothy Russell, Thomas Shay, Richard Berdine, Anthony Sanchez, Benjamin Ward, Won Roh

Proceedings Volume 5709, (2005) https://doi.org/10.1117/12.591035

KEYWORDS: Optical fibers, Polarization, Phase modulation, Birefringence, Signal attenuation, Manufacturing, Scattering, Fiber amplifiers, Wave plates, Single mode fibers

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Showing 5 of 20 publications

Conference Committee Involvement (3)

Fiber Lasers VII: Technology, Systems, and Applications

25 January 2010 | San Francisco, California, United States

Fiber Lasers VI: Technology, Systems, and Applications

26 January 2009 | San Jose, California, United States

Fiber Lasers V: Technology, Systems, and Applications

21 January 2008 | San Jose, California, United States

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