Dr. Floyd E. Hovis Profile

Dr. Floyd E. Hovis

SPIE Involvement:

Author

Publications (32)

Proceedings Article | 9 September 2019 Presentation + Paper

Dual-pulse pump laser for trace gas detection

Floyd Hovis, Christopher Lin, William Rudd

Proceedings Volume 11107, 111070M (2019) https://doi.org/10.1117/12.2532028

KEYWORDS: Optical amplifiers, Oscillators, Diodes, Laser development, Laser applications, Semiconductor lasers, Q switching, Gas lasers, Pulsed laser operation, Near field

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Proceedings Article | 9 September 2019 Presentation

Laser transmitter development for a methane DIAL system (Conference Presentation)

Fran Fitzpatrick, Joe Hansell, Tim Shuman, Jeremy Young

Proceedings Volume 11105, 111050U (2019) https://doi.org/10.1117/12.2532032

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Proceedings Article | 24 October 2018 Paper

Lifetime testing of a 355-nm, space-qualifiable laser

Fran Fitzpatrick, Joe Rudd, Michael Albert, Kent Puffenburger, Tom Schum, Slava Litvinovitch, Darrell Jones, Floyd Hovis

Proceedings Volume 10779, 1077908 (2018) https://doi.org/10.1117/12.2325015

KEYWORDS: Ultraviolet radiation, LIDAR, Diodes, Contamination, Laser applications, Laser development, UV optics

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Proceedings Article | 9 October 2018 Presentation + Paper

Development of a Mars lidar (MARLI) for measuring wind and aerosol profiles from orbit

Daniel Cremons, James Abshire, Graham Allan, Xiaoli Sun, Haris Riris, Michael Smith, Scott Guzewich, Anthony Yu, Floyd Hovis

Proceedings Volume 10791, 1079106 (2018) https://doi.org/10.1117/12.2325408

KEYWORDS: Wind measurement, Doppler effect, Mars, Aerosols, Telescopes, LIDAR, Atmospheric particles, Clouds, Fabry–Perot interferometers, Backscatter

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Our understanding of the Mars atmosphere and the coupled atmospheric processes that drive its seasonal cycles is limited by a lack of observation data, particularly measurements that capture diurnal and seasonal variations on a global scale. As outlined in the 2011 Planetary Science Decadal Survey and the recent Mars Exploration Program Analysis Group (MEPAG) Goals Document, near-polar-orbital measurements of height-resolved aerosol backscatter and wind profiles are a high-priority for the scientific community and would be valuable science products as part of a next-generation orbital science package. To address these needs, we have designed and tested a breadboard version of a direct detection atmospheric wind lidar for Mars orbit. It uses a single-frequency, seeded Nd:YAG laser ring oscillator operating at 1064 nm (4 kHz repetition rate), with a 30-ns pulse duration amplified to 4 mJ pulse energy. The receiver uses a Fabry-Perot etalon as part of a dual-edge optical discrimination technique to isolate the Doppler-induced frequency shift of the backscattered photons. To detect weak aerosol backscatter profiles, the instrument uses a 4x4 photon-counting HgCdTe APD detector with a 7 MHz bandwidth and < 0.4 fW/Hz^1/2noise equivalent power. With the MARLI lidar breadboard instrument, we were able to measure Doppler shifts continuously between 1 and 30 m/s by using a rotating chopper wheel to impart a Doppler shift to incident laser pulses. We then coupled the transmitter and receiver systems to a laser ranging telescope at the Goddard Geophysical and Astronomical Observatory (GGAO) to measure backscatter and Doppler wind profiles in the atmosphere from the ground. We measured a 5.3 ± 0.8 m/s wind speed from clouds in the planetary boundary layer at a range of 4 to 6 km. This measurement was confirmed with a range-over-time measurement to the same clouds as well as compared to EMC meteorological models. Here we describe the lidar approach and the breadboard instrument, and report some early results from ongoing field experiments.

Proceedings Article | 30 August 2017 Presentation + Paper

Stabilized diode seed laser for flight and space-based remote lidar sensing applications

Shirley McNeil, Pushkar Pandit, Philip Battle, Joe Rudd, Floyd Hovis

Proceedings Volume 10406, 104060F (2017) https://doi.org/10.1117/12.2275559

KEYWORDS: Semiconductor lasers, Laser applications, LIDAR, Laser stabilization, Fiber lasers, Laser development, Diodes, Nd:YAG lasers, Waveguides, Fiber coupled lasers

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Proceedings Article | 13 May 2016 Paper

Three-year aging of prototype flight laser at 10 kHz and 1 ns pulses with external frequency doubler for ICESat-2 mission

Oleg Konoplev, Furqan Chiragh, Aleksey Vasilyev, Ryan Edwards, Mark Stephen, Elisavet Troupaki, Anthony Yu, Michael Krainak, Nick Sawruk, Floyd Hovis, Charles Culpepper, Kathy Strickler

Proceedings Volume 9834, 98340A (2016) https://doi.org/10.1117/12.2225985

KEYWORDS: Crystals, Prototyping, Contamination, Laser crystals, Second-harmonic generation, Reliability, Diagnostics, Laser crystals, Control systems, Laser systems engineering, Laser applications

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Proceedings Article | 5 May 2016 Paper

UV lifetime demonstrator for space-based applications

Michael Albert, Kent Puffenburger, Tom Schum, Fran Fitzpatrick, Slava Litvinovitch, Darrell Jones, Joseph Rudd, Floyd Hovis

Proceedings Volume 9879, 987909 (2016) https://doi.org/10.1117/12.2228371

KEYWORDS: Ultraviolet radiation, LIDAR, Laser development, Semiconductor lasers, Laser applications, Clouds, Aerosols, Ozone, Contamination control, Process control, Semiconductor lasers, Laser applications, Optical amplifiers, Diodes, Oscillators, Amplifiers

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Proceedings Article | 2 September 2015 Paper

UV lifetime laser demonstrator for space-based applications

Michael Albert, Kent Puffenburger, Tom Schum, Fran Fitzpatrick, Slava Litvinovitch, Darrell Jones, Joseph Rudd, Floyd Hovis

Proceedings Volume 9612, 961209 (2015) https://doi.org/10.1117/12.2191188

KEYWORDS: Ultraviolet radiation, LIDAR, Optical amplifiers, Laser applications, Laser development, Oscillators, Diodes, Semiconductor lasers, Ozone, Interfaces

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Proceedings Article | 20 February 2015 Paper

ICESat-2 laser technology readiness level evolution

Nicholas Sawruk, Patrick Burns, Ryan Edwards, Theodore Wysocki, Andre VanTuijl, Viatcheslav Litvinovitch, Edward Sullivan, Floyd Hovis

Proceedings Volume 9342, 93420L (2015) https://doi.org/10.1117/12.2080531

KEYWORDS: Laser applications, Laser systems engineering, Pulsed laser operation, Laser optics, Neodymium, Electronics, Reliability, Electromagnetic coupling, Laser development, Diodes

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Proceedings Article | 26 September 2014 Paper

Design validation for ICESat2 space-based laser transmitter

Patrick Burns, Nicholas Sawruk, Andre VanTuijl, Slava Litvinovitch, Ti Chuang, Ryan Edwards, William Rudd, Elias Fakhoury, Theodore Wysocki, Floyd Hovis

Proceedings Volume 9218, 92181G (2014) https://doi.org/10.1117/12.2062323

KEYWORDS: Laser development, Electromagnetic coupling, Transmitters, Laser applications, Space telescopes, Laminated object manufacturing, Fiber amplifiers, Near field optics, Fourier transforms, Reliability

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Proceedings Article | 17 September 2013 Paper

Approach to space-qualification of the ICESat-2 laser transmitter

Floyd Hovis, Nick Sawruk, Mark Stephen, Joel Edelman, Slava Litvinovitch, Ryan Edwards, Joe Rudd, Jim Bautch, Elias Fakhoury

Proceedings Volume 8872, 887203 (2013) https://doi.org/10.1117/12.2026269

KEYWORDS: Laser applications, Laser development, Transmitters, Optical filters, Clouds, Aerosols, LIDAR, Electronics, Distortion, Oscillators

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Proceedings Article | 17 September 2013 Paper

Space certification and qualification programs for laser diode modules on the NASA ICESat-2 Mission

Nicholas Sawruk, Mark Stephen, Kevin Bruce, Thomas Eltringham, Franklin Nash, Alfonso Piccirilli, Walter Slusark, Floyd Hovis

Proceedings Volume 8872, 887204 (2013) https://doi.org/10.1117/12.2026253

KEYWORDS: Semiconductor lasers, Reliability, Transmitters, Fiber coupled lasers, Statistical analysis, Commercial off the shelf technology, Failure analysis, Fiber couplers, Laser applications

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Proceedings Article | 17 September 2013 Paper

Development of a TRL-5 conductively-cooled 2-micron laser transmitter for coherent doppler wind lidar system

Timothy Shuman, Floyd Hovis, Upendra Singh, Mulugeta Petros, Jirong Yu, Michael Kavaya

Proceedings Volume 8872, 887205 (2013) https://doi.org/10.1117/12.2024358

KEYWORDS: Laser applications, LIDAR, Laser development, Diodes, Transmitters, Laser resonators, Doppler effect, Solid state lasers, Resonators, Solid state electronics

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Proceedings Article | 17 September 2013 Paper

ICESat-2 laser technology development

Ryan Edwards, Nick Sawruk, Floyd Hovis, Patrick Burns, Theodore Wysocki, Joe Rudd, Brooke Walters, Elias Fakhoury, Vincent Prisciandaro

Proceedings Volume 8872, 88720S (2013) https://doi.org/10.1117/12.2024326

KEYWORDS: Diodes, Laser development, Optical amplifiers, Oscillators, Laser applications, Neodymium lasers, Laser systems engineering, Transmitters, Laser damage threshold, Hardware testing

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Proceedings Article | 6 March 2013 Paper

Space qualified laser transmitter for NASA's ICESat-2 mission

Nicholas Sawruk, Mark Stephen, Slava Litvinovitch, Joel Edelman, Michael Albert, Ryan Edwards, Charles Culpepper, William Rudd, Elias Fakhoury, Floyd Hovis

Proceedings Volume 8599, 85990O (2013) https://doi.org/10.1117/12.2005590

KEYWORDS: Transmitters, Laser applications, Pulsed laser operation, Laser optics, Neodymium, Thermography, Optical amplifiers, Thermal modeling, Laser systems engineering, Tunable lasers

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Proceedings Article | 6 March 2013 Paper

Space-based, multi-wavelength solid-state lasers for NASA's Cloud Aerosol Transport System for International Space Station (CATS-ISS)

Ti Chuang, Patrick Burns, E. Brooke Walters, Ted Wysocki, Tim Deely, Andy Losse, Khoa Le, Bill Drumheller, Tom Schum, Mark Hart, Kent Puffenburger, Bill Ziegler, Floyd Hovis

Proceedings Volume 8599, 85990N (2013) https://doi.org/10.1117/12.2005545

KEYWORDS: Computed tomography, Laminated object manufacturing, Semiconductor lasers, Oscillators, Laser systems engineering, Optical amplifiers, Laser applications, Transmitters, Mirrors, Modes of laser operation

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Proceedings Article | 14 September 2011 Paper

High efficiency laser designs for airborne and space-based lidar remote sensing systems

F. Hovis, R. Burnham, M. Storm, R. Edwards, P. Burns, E. Sullivan, J. Edelman, K. Andes, B. Walters, K. Le, C. Culpepper, J. Rudd, T. Chuang, X. Dang, J. Hwang, T. Wysocki

Proceedings Volume 8159, 815903 (2011) https://doi.org/10.1117/12.896106

KEYWORDS: Laser development, Transmitters, LIDAR, Oscillators, Pulsed laser operation, Prototyping, Optical amplifiers, Diodes, Remote sensing, Semiconductor lasers

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Proceedings Article | 14 February 2008 Paper

Recent progress on single frequency lasers for space and high altitude aircraft applications

F. Hovis, J. Edelman, T. Schum, J. Rudd, K. Andes

Proceedings Volume 6871, 68710E (2008) https://doi.org/10.1117/12.768278

KEYWORDS: Oscillators, Optical amplifiers, LIDAR, Transmitters, Laser development, Airborne laser technology, Electronics, Signal detection, Diodes, Laser applications

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Proceedings Article | 26 September 2007 Paper

Development of an airborne molecular direct detection Doppler lidar for tropospheric wind profiling

Bruce Gentry, Matthew McGill, Geary Schwemmer, Michael Hardesty, Alan Brewer, Thomas Wilkerson, Robert Atlas, Marcos Sirota, Scott Lindemann, Floyd Hovis

Proceedings Volume 6681, 66810B (2007) https://doi.org/10.1117/12.739379

KEYWORDS: LIDAR, Doppler effect, Fabry–Perot interferometers, Receivers, Holographic optical elements, Telescopes, Wind measurement, Aerosols, Space telescopes, Signal detection

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Proceedings Article | 24 September 2007 Paper

Development and testing of a risk reduction high energy laser transmitter for high spectral resolution lidar and Doppler winds lidar

Jinxue Wang, Victor Leyva, Floyd Hovis

Proceedings Volume 6681, 668107 (2007) https://doi.org/10.1117/12.736039

KEYWORDS: LIDAR, Aerosols, Laser energy, Transmitters, Doppler effect, Wind energy, Optical amplifiers, Spectral resolution, Nd:YAG lasers, Laser scattering

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Proceedings Article | 3 May 2007 Paper

High-efficiency UV laser for space-based wind lidar

Floyd Hovis, Jinxue Wang

Proceedings Volume 6555, 655504 (2007) https://doi.org/10.1117/12.720251

KEYWORDS: Diodes, Oscillators, Optical amplifiers, LIDAR, Semiconductor lasers, Transmitters, Electronics, Nd:YAG lasers, Control systems, Ultraviolet radiation

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Proceedings Article | 19 May 2006 Paper

High energy single-mode all-solid-state, tunable UV laser transmitter

Narasimha Prasad, Upendra Singh, Floyd Hovis, Darrell Armstrong

Proceedings Volume 6214, 62140T (2006) https://doi.org/10.1117/12.666879

KEYWORDS: Optical amplifiers, Ultraviolet radiation, Optical parametric oscillators, Diodes, Nd:YAG lasers, Amplifiers, Oscillators, Crystals, Wind energy, Ferroelectric materials

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Proceedings Article | 28 February 2006 Paper

Qualification of the laser transmitter for the CALIPSO aerosol lidar mission

Floyd Hovis

Proceedings Volume 6100, 61001X (2006) https://doi.org/10.1117/12.659748

KEYWORDS: Prototyping, Semiconductor lasers, Transmitters, Laser optics, Laser development, Optical benches, LIDAR, Laser resonators, Electronics, Optical fabrication

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Proceedings Article | 19 May 2005 Paper

Conductively cooled lasers for space-based applications

Floyd Hovis, Nigel Martin, Ralph Burnham

Proceedings Volume 5798, (2005) https://doi.org/10.1117/12.607011

KEYWORDS: Optical amplifiers, Diodes, Oscillators, Head, Semiconductor lasers, Transmitters, Nd:YAG lasers, Prisms, Diffraction, Beam propagation method

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Proceedings Article | 12 January 2005 Paper

Single-frequency 355 nm source for direct detection wind lidar

Floyd Hovis, Charles Culpepper, Tom Schum, Greg Witt

Proceedings Volume 5653, (2005) https://doi.org/10.1117/12.578771

KEYWORDS: Oscillators, Optical amplifiers, Transmission electron microscopy, Resonators, Head, Reflectivity, LIDAR, Wave plates, Laser development, Telescopes

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Proceedings Article | 8 July 2004 Paper

Single-frequency lasers for remote sensing

Floyd Hovis, Michael Rhoades, Ralph Burnham, Jason Force, T. Schum, Bruce Gentry, Huailin Chen, Steven Li, Johnathan Hair, Anthony Cook, Chris Hostetler

Proceedings Volume 5332, (2004) https://doi.org/10.1117/12.538772

KEYWORDS: LIDAR, Oscillators, Pulsed laser operation, Optical amplifiers, Doppler effect, Semiconductor lasers, Laser stabilization, Laser optics, Aerosols, Diodes

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Proceedings Article | 27 May 1996 Paper

Contamination damage in pulsed 1-um lasers

Floyd Hovis, Bart Shepherd, Christopher Radcliffe, Henry Maliborski

Proceedings Volume 2714, (1996) https://doi.org/10.1117/12.240348

KEYWORDS: Contamination, Silicon, Nitrogen, Optical damage, Oxygen, Laser systems engineering, Laser development, Nd:YAG lasers, Laser induced damage, Polymers

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Proceedings Article | 14 July 1995 Paper

Mechanisms of contamination-induced optical damage in lasers

Floyd Hovis, Bart Shepherd, Christopher Radcliffe, Henry Maliborski

Proceedings Volume 2428, (1995) https://doi.org/10.1117/12.213736

KEYWORDS: Silicon, Contamination, Optical damage, Nitrogen, Oxygen, Laser induced damage, Semiconductor lasers, Scanning electron microscopy, Deposition processes, Absorption

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Proceedings Article | 13 October 1994 Paper

Solid state dye laser

William Moreshead, Jean-Luc Nogues, Floyd Hovis

Proceedings Volume 2288, (1994) https://doi.org/10.1117/12.189001

KEYWORDS: Dye lasers, Sol-gels, Rhodamine, Glasses, Luminescence, Solid state physics, Solid state lasers, Nd:YAG lasers, Silica, Polymethylmethacrylate

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Proceedings Article | 28 July 1994 Paper

Optical damage at the part per million level: the role of trace contamination in laser-induced optical damage

Floyd Hovis, Bart Shepherd, Christopher Radcliffe, Andrew Bailey, William Boswell

Proceedings Volume 2114, (1994) https://doi.org/10.1117/12.180872

KEYWORDS: Contamination, Optical damage, Nitrogen, Laser optics, Laser induced damage, Gases, Laser development, Carbon, Laser systems engineering, Sensors

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Proceedings Article | 28 July 1994 Paper

Beyond perfection: the need for understanding contamination effects on real-world optics

Steven Guch, Floyd Hovis

Proceedings Volume 2114, (1994) https://doi.org/10.1117/12.180900

KEYWORDS: Optical coatings, Contamination, Optical damage, Laser optics, Silicon, Laser development, Laser applications, Visualization, Laser systems engineering, Space operations

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Proceedings Article | 1 May 1991 Paper

Removal of small particles from surfaces by pulsed laser irradiation: observations and a mechanism

J. Kelley, Michael Stuff, Floyd Hovis, Gary Linford

Proceedings Volume 1415, (1991) https://doi.org/10.1117/12.43701

KEYWORDS: Particles, Tungsten, Pulsed laser operation, Laser irradiation, Epoxies, Modeling and simulation, Laser systems engineering, Absorption, Nd:YAG lasers, Atmospheric particles

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