Dr. Brett H. Hokr Profile

Dr. Brett H. Hokr

CTO/Owner

SPIE Involvement:

Conference Program Committee | Author

Publications (16)

Proceedings Article | 9 March 2020 Presentation

Machine learning estimations of tissue optical properties for a multi-layered model (Conference Presentation)

Joel Bixler, Brett Hokr

Proceedings Volume 11238, 112380Q (2020) https://doi.org/10.1117/12.2546816

KEYWORDS: Optical properties, Tissue optics, Machine learning, Monte Carlo methods, Tissues, Neural networks, Laser tissue interaction, In vivo imaging, Optical testing, Absorption

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Proceedings Article | 20 February 2020 Presentation + Paper

Neural network generation for estimation of tissue optical properties

Eddie Gil, Brett Hokr, Joel Bixler

Proceedings Volume 11238, 1123809 (2020) https://doi.org/10.1117/12.2546068

KEYWORDS: Monte Carlo methods, Optical properties, Neural networks, Backscatter, Convolution, Tissue optics, Photon transport, Scattering, Tissues, Matrices, Machine learning

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Proceedings Article | 3 January 2019 Paper

Optically pumped rare gas lasers

J. Han, C. Sanderson, B. Hokr, C. Ballmann, A. Clark, M. Heaven

Proceedings Volume 11042, 1104202 (2019) https://doi.org/10.1117/12.2522346

KEYWORDS: Xenon, Optical pumping, Argon, Roentgenium, Continuous wave operation, Semiconductor lasers, Pulsed laser operation, Electrodes, Gas lasers, Laser optics

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Proceedings Article | 14 May 2018 Paper

A dual wave infrared imaging polarimeter

J. Larry Pezzaniti, Brett Hokr, Jenny Niles, Rich Edmondson, Michael Roche, Lisa Blackwell

Proceedings Volume 10655, 106550X (2018) https://doi.org/10.1117/12.2309973

KEYWORDS: Polarization, Thermography, Long wavelength infrared, Water, Polarimetry, Mid-IR, Infrared imaging, Infrared radiation, Infrared signatures, Sensors

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Proceedings Article | 14 May 2018 Presentation + Paper

Acquisition sensor technologies for improved performance in adverse weather conditions

Greg Finney, Christopher Persons, Brett Hokr

Proceedings Volume 10655, 106550P (2018) https://doi.org/10.1117/12.2306072

KEYWORDS: Sensors, Polarimetry, Clouds, Mid-IR, Long wavelength infrared, Calibration, Atmospheric propagation, Visibility through fog, Visibility

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Proceedings Article | 19 September 2017 Paper

Polarized photon transport through fog

Jonathan Farmer, Christopher Persons, Robert DeSilva, James Kirkland, Greg Finney, Kirk Fuller, Brett Hokr

Proceedings Volume 10408, 104080I (2017) https://doi.org/10.1117/12.2282813

KEYWORDS: Fiber optic gyroscopes, Mie scattering, Light scattering, Scattering, Monte Carlo methods, Atmospheric particles, Photon transport, Atmospheric propagation, Air contamination, Visibility through fog

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Proceedings Article | 23 February 2017 Presentation + Paper

Improved light injection and enhanced Raman scattering in microfabricated opaque structures

Jonathan Thompson, Brett Hokr, Vladislav Yakovlev

Proceedings Volume 10112, 101120S (2017) https://doi.org/10.1117/12.2252775

KEYWORDS: Light scattering, Laser scattering, Raman scattering, Scattering, Raman spectroscopy, Microfabrication, Signal detection, Molecules, Optical testing, Beam splitters

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Proceedings Article | 21 February 2017 Presentation + Paper

Towards an optical "black hole": surface reshaping for an optimal optical coupling into turbid medium

Jonathan Thompson, Brett Hokr, Vladislav Yakovlev

Proceedings Volume 10073, 100730W (2017) https://doi.org/10.1117/12.2252632

KEYWORDS: Geometrical optics, Light scattering, Beam shaping, Light wave propagation, Wavefront sensors, Tissue optics, Optical imaging, Scattering, Tissues, Wavefronts, Diffusion, Laser scattering, Biomedical optics, Charge-coupled devices, Picosecond phenomena, Raman scattering

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Proceedings Article | 27 April 2016 Presentation

Novel approach for non-invasive glucose sensing using vibrational contrast CD absorption measurements (Conference Presentation)

Vladislav Yakovlev, Carlos Tovar, Brett Hokr, Georgi Petrov

Proceedings Volume 9723, 97230J (2016) https://doi.org/10.1117/12.2213604

KEYWORDS: Glucose, Absorption, Light scattering, Dichroic materials, Short wave infrared radiation, Infrared radiation, Molecules, Scattering, Monte Carlo methods, Ultrasonography

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Proceedings Article | 15 March 2016 Presentation + Paper

Enhanced second-harmonic-generation detection of collagen by means of optical wavefront shaping

Jonathan Thompson, Graham Throckmorton, Brett Hokr, Vladislav Yakovlev

Proceedings Volume 9717, 97170N (2016) https://doi.org/10.1117/12.2213644

KEYWORDS: Laser scattering, Nonlinear crystals, Signal detection, Optimization (mathematics)

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Proceedings Article | 15 March 2016 Presentation + Paper

Optical wavefront shaping for the enhancement of Raman signal in scattering media

Jonathan Thompson, Graham Throckmorton, Brett Hokr, Vladislav Yakovlev

Proceedings Volume 9717, 97170M (2016) https://doi.org/10.1117/12.2213625

KEYWORDS: Titanium dioxide, Light scattering, Tissue optics, Wavefronts, Raman scattering, Scattering, Raman spectroscopy, Scattering media, Microscopy, Tissues, Nanotechnology, Laser scattering, Molecules

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Proceedings Article | 9 March 2016 Paper

Lighting up microscopy with random Raman lasing

Brett Hokr, Dawson Nodurft, Jonathan Thompson, Joel Bixler, Gary Noojin, Brandon Redding, Robert Thomas, Hui Cao, Benjamin Rockwell, Marlan Scully, Vladislav Yakovlev

Proceedings Volume 9732, 973208 (2016) https://doi.org/10.1117/12.2212886

KEYWORDS: Raman spectroscopy, Microscopy, Light sources, Spatial coherence, Laser spectroscopy, Light sources and illumination, Microscopes, Mercury, Lamps, Temporal resolution, Speckle, Laser induced damage, Charge-coupled devices, Laser scattering

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Proceedings Article | 7 March 2016 Presentation + Paper

Methods for variance reduction in Monte Carlo simulations

Joel Bixler, Brett Hokr, Aidan Winblad, Gabriel Elpers, Byron Zollars, Robert Thomas

Proceedings Volume 9706, 970612 (2016) https://doi.org/10.1117/12.2213470

KEYWORDS: Monte Carlo methods, Diffraction, Photons, Gaussian optics, Geometrical optics, Computer simulations, Chemical analysis, Gold, Ranging, Multiphoton fluorescence microscopy, Scattering, Error analysis, Statistical analysis, Tissue optics, Ray tracing, Scattering media

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Proceedings Article | 7 March 2016 Presentation + Paper

Accurately modeling Gaussian beam propagation in the context of Monte Carlo techniques

Brett Hokr, Aidan Winblad, Joel Bixler, Gabriel Elpers, Byron Zollars, Marlan Scully, Vladislav Yakovlev, Robert Thomas

Proceedings Volume 9706, 970614 (2016) https://doi.org/10.1117/12.2213653

KEYWORDS: Monte Carlo methods, Photons, Diffraction, Optical simulations, Gaussian optics, Laser tissue interaction, Gaussian beams, Beam propagation method, Microscopy, Tissue optics, Tissues, Natural surfaces, Scattering, Absorption, Laser scattering

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Proceedings Article | 4 March 2016 Paper

Evidence of Anderson localization effects in random Raman lasing

Brett Hokr, Alexander Cerjan, Jonathan Thompson, Luqi Yuan, Seng Fatt Liew, Joel Bixler, Gary Noojin, Robert Thomas, Hui Cao, A. Douglas Stone, Benjamin Rockwell, Marlan Scully, Vladislav Yakovlev

Proceedings Volume 9731, 973110 (2016) https://doi.org/10.1117/12.2212911

KEYWORDS: Raman spectroscopy, Diffusion, Absorption, Raman scattering, Monte Carlo methods, Photons, Picosecond phenomena, Statistical modeling, Nonlinear dynamics, Nonlinear optics, Speckle, Laser applications, Charge-coupled devices, Wave propagation, Laser scattering

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Proceedings Article | 5 March 2015 Paper

Modeling of tissue heating under tunable near IR radiation

Joel Bixler, Brett Hokr, Chad Oian, Aaron Hoffman, Vladislav Yakovlev, Robert Thomas

Proceedings Volume 9321, 93210D (2015) https://doi.org/10.1117/12.2079979

KEYWORDS: Tissues, Tissue optics, Laser tissue interaction, Radiation effects, Laser damage threshold, Thermal modeling, Infrared radiation, Near infrared, Optical parametric oscillators, Thermography

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Showing 5 of 16 publications

Conference Committee Involvement (2)

Unconventional Imaging, Sensing, and Adaptive Optics 2024

19 August 2024 | San Diego, California, United States

Unconventional Imaging, Sensing, and Adaptive Optics 2023

21 August 2023 | San Diego, California, United States

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