Dr. Michael G. Wickham Profile

Dr. Michael G. Wickham

Staff Scientist at Northrop Grumman Space Technology

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Author

Publications (12)

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 | 23 February 2006 Paper

Coherently coupled high-power fiber arrays

Jesse Anderegg, Stephen Brosnan, Eric Cheung, Paul Epp, Dennis Hammons, Hiroshi Komine, Mark Weber, Michael Wickham

Proceedings Volume 6102, 61020U (2006) https://doi.org/10.1117/12.650138

KEYWORDS: Fiber amplifiers, Phase measurement, Phased arrays, Optical amplifiers, Laser applications, Heterodyning, Modulators, Electronics, Clocks, Fiber couplers

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Proceedings Article | 3 July 2003 Paper

8-W coherently phased 4-element fiber array

Jesse Anderegg, Stephen Brosnan, Mark Weber, Hiroshi Komine, Michael Wickham

Proceedings Volume 4974, (2003) https://doi.org/10.1117/12.478311

KEYWORDS: Phased arrays, Phase measurement, Fiber amplifiers, Electronics, Heterodyning, Optical amplifiers, Sensors, Interferometers, Modulators, Semiconductor lasers

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Proceedings Article | 7 September 2000 Paper

Precise adaptive photonic rf filters realized with adaptive Bragg gratings

Michael Wickham, Eric Upton

Proceedings Volume 4112, (2000) https://doi.org/10.1117/12.399383

KEYWORDS: Signal processing, Filtering (signal processing), Fiber Bragg gratings, Control systems, Optical filters, Electronic filtering, Servomechanisms, Linear filtering, Digital filtering, Modulators

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Proceedings Article | 3 November 1998 Paper

Evaluation of optical channelizers in terms of rf performance

Robert Lodenkamper, Richard Davis, Lawrence Lembo, Michael Wickham, John Brock

Proceedings Volume 3463, (1998) https://doi.org/10.1117/12.330387

KEYWORDS: Channel projecting optics, Sensors, Heterodyning, Detector arrays, Diffraction gratings, Signal detection, Optical filters, Fabry–Perot interferometers, Filtering (signal processing), Signal attenuation

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Proceedings Article | 2 October 1998 Paper

Some significant communications processing realized with adaptive Bragg gratings

Eric Upton, Michael Wickham, Martin Smith, James Hart, Robert Flynn, Steven Havstad, Paul Nachman

Proceedings Volume 3461, (1998) https://doi.org/10.1117/12.325721

KEYWORDS: Signal processing, Fiber Bragg gratings, Filtering (signal processing), Control systems, Linear filtering, Digital signal processing, Optical filters, Servomechanisms, Modulators, Electronic filtering

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Proceedings Article | 24 June 1998 Paper

Diode-array-pumped kilowatt laser

Randall St. Pierre, David Mordaunt, Hagop Injeyan, Jacqueline Berg, Rodger Hilyard, Mark Weber, Michael Wickham, George Harpole

Proceedings Volume 3264, (1998) https://doi.org/10.1117/12.311900

KEYWORDS: Diffraction, Nd:YAG lasers, Diode pumped solid state lasers, Ferroelectric materials, Semiconductor lasers, Optical amplifiers, Diffusion, Oscillators, Reflectivity, Laser scattering

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Proceedings Article | 22 November 1996 Paper

Fiber optic Bragg grating true-time-delay generator for broadband rf applications

Michael Wickham, Lawrence Lembo, Lawrence Dozal, John Brock

Proceedings Volume 2844, (1996) https://doi.org/10.1117/12.259002

KEYWORDS: Antennas, Phased array optics, Fiber optics, Fiber Bragg gratings, Phase shifts, Nulling interferometry, Phased arrays, Signal attenuation, Beam steering, Switching

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Proceedings Article | 1 October 1995 Paper

Fiber optic Bragg grating true-time-delay generator for broadband rf applications

Michael Wickham, Lawrence Dozal, Lawrence Lembo, John Brock

Proceedings Volume 2560, (1995) https://doi.org/10.1117/12.218519

KEYWORDS: Phased array optics, Antennas, Fiber Bragg gratings, Fiber optics, Modulation, Signal attenuation, Reflectivity, Prisms, Single mode fibers, Switching

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Proceedings Article | 10 June 1994 Paper

Low-loss fiber optic time-delay element for phased-array antennas

Lawrence Lembo, Terry Holcomb, Michael Wickham, Philip Wisseman, John Brock

Proceedings Volume 2155, (1994) https://doi.org/10.1117/12.177398

KEYWORDS: Fiber optics, Optical components, Fiber optic components, Antennas, Phased array optics, Fiber Bragg gratings, Optical networks, Phased arrays, Holography, Single mode fibers

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Proceedings Article | 16 June 1993 Paper

One joule per pulse, 100-W, diode-pumped, near-diffraction-limited, phase-conjugated Nd:YAG master oscillator power amplifier

Randall St. Pierre, Hagop Injeyan, Rodger Hilyard, Mark Weber, Jacqueline Berg, Michael Wickham, Carolyn Hoefer, Jason Machan

Proceedings Volume 1865, (1993) https://doi.org/10.1117/12.146935

KEYWORDS: Optical amplifiers, Oscillators, Diodes, Nd:YAG lasers, Pulsed laser operation, Phase conjugation, Diffraction, Energy efficiency, Semiconductor lasers, Reflectivity

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Proceedings Article | 1 May 1991 Paper

CCD holographic phase and intensity measurement of laser wavefront

Michael Wickham, Jesper Munch

Proceedings Volume 1414, (1991) https://doi.org/10.1117/12.43665

KEYWORDS: Holograms, Phase measurement, Charge-coupled devices, Laser beam diagnostics, Holography, Fourier transforms, Received signal strength, Phase conjugation, Diagnostics, Frame grabbers

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Showing 5 of 12 publications

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