Dr. John D. Downie Profile

Dr. John D. Downie

Principal Research Scientist at Corning Research & Development Corp

SPIE Involvement:

Author

Publications (27)

Proceedings Article | 15 March 2023 Presentation + Paper

Power-efficient undersea SDM systems

John Downie

Proceedings Volume 12429, 124290A (2023) https://doi.org/10.1117/12.2648465

KEYWORDS: Optical amplifiers, Signal attenuation, Data modeling, Signal to noise ratio, Power consumption, Quadrature amplitude modulation, Design and modelling, Transceivers, Power supplies

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Proceedings Article | 5 March 2021 Presentation + Paper

Modified DSP with reduced complexity in adaptive equalization for DCI systems

Xiaojun Liang, John Downie, Jason Hurley

Proceedings Volume 11711, 117110D (2021) https://doi.org/10.1117/12.2584624

KEYWORDS: Digital signal processing, Filtering (signal processing), Digital filtering, Transceivers, Receivers, Polarization, Electronic filtering, Transmitters, Signal detection, Optical fibers

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Proceedings Article | 31 January 2020 Presentation + Paper

DCI systems with ultra-low loss and low dispersion fiber

Xiaojun Liang, John Downie, Ming-Jun Li, Hui Su, Jason Hurley, James Himmelreich, Hao Dong, Sergejs Makovejs

Proceedings Volume 11309, 113090A (2020) https://doi.org/10.1117/12.2543074

KEYWORDS: Transceivers, Signal attenuation, Digital signal processing, Signal to noise ratio, Digital filtering, Monte Carlo methods, Data centers, Single mode fibers, Quadrature amplitude modulation, Wavelength division multiplexing

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Proceedings Article | 31 January 2020 Paper

Frequency offset estimation algorithm for a multi-subcarrier coherent fiber optical system

Ryan Ramdial, Xiaojun Liang, Shiva Kumar, John Downie, William Wood

Proceedings Volume 11309, 113090K (2020) https://doi.org/10.1117/12.2549280

KEYWORDS: Transmitters, Edge detection, Signal detection, Digital signal processing, Dispersion, Fiber optics, Heterodyning, Oscillators, Modulation, Modulators

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Proceedings Article | 29 January 2018 Presentation + Paper

G.654.E optical fibers for high-data-rate terrestrial transmission systems with long reach

John Downie, Sergejs Makovejs, Jason Hurley, Michal Mlejnek, Hector De Pedro

Proceedings Volume 10561, 105610N (2018) https://doi.org/10.1117/12.2297683

KEYWORDS: Systems modeling, Signal attenuation, Optical amplifiers, Optical fibers, Single mode fibers, Signal to noise ratio, Fiber characterization

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Proceedings Article | 7 March 2016 Paper

Power penalties for multi-level PAM modulation formats at arbitrary bit error rates

Nikolay Kaliteevskiy, William Wood, John Downie, Jason Hurley, Petr Sterlingov

Proceedings Volume 9775, 977508 (2016) https://doi.org/10.1117/12.2213113

KEYWORDS: Forward error correction, Modulation, Standards development, Monte Carlo methods, Amplitude modulation, Optical communications, Data centers, Network architectures, Computer architecture, Eye, Mathematical modeling, Signal detection, Sensors, Statistical analysis, Linear filtering

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Proceedings Article | 25 January 2012 Open Access

112 Gb/s PM-QPSK transmission systems with reach lengths enabled by optical fibers with ultra-low loss and very large effective area

John Downie

Proceedings Volume 8284, 828403 (2012) https://doi.org/10.1117/12.906838

KEYWORDS: Signal attenuation, Optical amplifiers, Optical fibers, Raman spectroscopy, Forward error correction, Modulation, Polarization, Receivers, Tolerancing, Optical filters

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Proceedings Article | 25 January 2012 Paper

Performance of PM QPSK and PM 16-QAM coherent optical fiber communication systems

J. Cartledge, J. Downie, J. Hurley, A. Karar, J. H. Ke, I. Roudas, K. Roberts

Proceedings Volume 8284, 82840C (2012) https://doi.org/10.1117/12.910847

KEYWORDS: Phase modulation, Signal processing, Optical amplifiers, Polarization, Receivers, Digital filtering, Digital signal processing, Telecommunications, Multiplexing, Optical filters

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SPIE Journal Paper | 1 January 2007 Open Access

Impact of uncompensated dispersion on non-Gaussian statistics in duobinary transmission

Sergey Lobanov, Srikanth Raghavan, John Downie, Yihong Mauro, Michael Sauer, Jason Hurley

OE, Vol. 46, Issue 01, 010501, (January 2007) https://doi.org/10.1117/12.10.1117/1.2430507

KEYWORDS: Statistical analysis, Receivers, Dense wavelength division multiplexing, Modulation, Multiplexing, Error analysis, Linear filtering, Optical amplifiers, Numerical simulations, Transmitters

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Proceedings Article | 30 April 2004 Paper

Large effective area nonzero dispersion-shifted fiber in metro/provincial network environments

John Downie, Frank Annunziata, Adam Filios, Tim Kennedy, Donghyun Kim, Seung Oh

Proceedings Volume 5279, (2004) https://doi.org/10.1117/12.520568

KEYWORDS: Single mode fibers, Modulation, Transmitters, Laser sintering, Fiber lasers, Modulators, Coarse wavelength division multiplexing, Receivers, Lithium niobate, Eye

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Proceedings Article | 8 July 2002 Paper

Balancing filter distortion and crosstalk impairments in optical networks

John Downie, Alranzo Ruffin

Proceedings Volume 4872, (2002) https://doi.org/10.1117/12.475128

KEYWORDS: Optical filters, Electronic filtering, Distortion, Optical networks, Multiplexers, Channel projecting optics, Modulation, Eye, Signal detection, Wavelength division multiplexing

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Proceedings Article | 5 November 1998 Paper

Bit-error-rate issues for holographic data storage in bacteriorhodopsin films

John Downie, Dogan Timucin, Charles Gary, Meric Oezcan, Daniel Smithey, Marshall Crew

Proceedings Volume 3468, (1998) https://doi.org/10.1117/12.330418

KEYWORDS: Holograms, Data storage, Diffraction, Holography, Glasses, Binary data, Information operations, Polymers, Optical storage, Signal to noise ratio

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Proceedings Article | 9 October 1998 Paper

Photoinduced anisotropy in bacteriorhodopsin films

Qi Wang Song, Yu-He Zhang, Robert Birge, John Downie

Proceedings Volume 3470, (1998) https://doi.org/10.1117/12.326865

KEYWORDS: Dichroic materials, Birefringence, Absorption, Refractive index, Anisotropy, Polarizers, Polarization, Molecules, Absorbance, Statistical analysis

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Proceedings Article | 1 April 1998 Paper

Gaussian beam propagation in a bacteriorhodopsin film

Qi Wang Song, Xu-Ming Wang, Robert Birge, John Downie, Dogan Timucin, Charles Gary, John Malowicki, Serey Thai

Proceedings Volume 3402, (1998) https://doi.org/10.1117/12.304988

KEYWORDS: Absorption, Gaussian beams, Modulation, Optical simulations, Phase modulation, Beam propagation method, Light wave propagation, Wave propagation, Computer simulations, Fourier transforms

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Proceedings Article | 20 November 1996 Paper

Measuring the spatial frequency transfer function of phase-measuring interferometers for laser optics

C. Robert Wolfe, John Downie, Janice Lawson

Proceedings Volume 2870, (1996) https://doi.org/10.1117/12.259943

KEYWORDS: Wavefronts, Interferometers, Spatial frequencies, Modulation, Phase interferometry, National Ignition Facility, Sensors, Laser optics, Calibration, Optical components

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SPIE Journal Paper | 1 June 1994

Design of ternary correlation filters to reduce probability of error

John Downie

OE, Vol. 33, Issue 06, (June 1994) https://doi.org/10.1117/12.10.1117/12.171600

KEYWORDS: Image filtering, Algorithms, Signal to noise ratio, Image processing, Composites, Optical filters, Algorithm development, Distortion, Correlation function, Computer simulations

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Proceedings Article | 9 November 1993 Paper

Reduced classification error probability with ternary correlation filters

John Downie

Proceedings Volume 2026, (1993) https://doi.org/10.1117/12.163573

KEYWORDS: Image filtering, Algorithms, Image processing, Composites, Spatial light modulators, Correlation function, Modulation, Signal to noise ratio, Optical filters, Phase only filters

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SPIE Journal Paper | 1 August 1993

Optimal binary phase and amplitude correlation filters for polarization-rotating spatial light modulators

John Downie

OE, Vol. 32, Issue 08, (August 1993) https://doi.org/10.1117/12.10.1117/12.145602

KEYWORDS: Signal to noise ratio, Polarizers, Optical filters, Image filtering, Binary data, Phase only filters, Spatial light modulators, Optimal filtering, Polarization, Transmittance

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SPIE Journal Paper | 1 March 1993

Case study of binary and ternary synthetic discriminant function filters with similar in-class and out-of-class images

John Downie

OE, Vol. 32, Issue 03, (March 1993) https://doi.org/10.1117/12.10.1117/12.61203

KEYWORDS: Image filtering, Signal to noise ratio, Distortion, Binary data, Optical filters, Chlorine, Phase only filters, Image processing, Spatial light modulators, Optimal filtering

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Proceedings Article | 24 August 1992 Paper

Error analysis of optical correlators

Paul Ma, Max Reid, John Downie

Proceedings Volume 1704, (1992) https://doi.org/10.1117/12.139900

KEYWORDS: Signal to noise ratio, Optical correlators, Image filtering, Tolerancing, Fourier transforms, Phase measurement, Optical filters, Error analysis, Spatial light modulators, Correlation function

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Proceedings Article | 1 July 1992 Paper

Optimizing binary phase and amplitude filters for PCE, SNR, and discrimination

John Downie

Proceedings Volume 1701, (1992) https://doi.org/10.1117/12.138321

KEYWORDS: Signal to noise ratio, Optical filters, Polarizers, Binary data, Image filtering, Phase only filters, Spatial light modulators, Optical pattern recognition, Polarization, Magneto-optics

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Proceedings Article | 1 November 1991 Paper

Optical correlator techniques applied to robotic vision

Butler Hine, Max Reid, John Downie

Proceedings Volume 1564, (1991) https://doi.org/10.1117/12.49702

KEYWORDS: Optical correlators, Databases, Optical filters, Image filtering, Robotic systems, Optical signal processing, Robot vision, Digital electronics, Spatial light modulators, Algorithm development

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Proceedings Article | 1 November 1991 Paper

Correction of magneto-optic device phase errors in optical correlators through filter design modifications

John Downie, Max Reid, Butler Hine

Proceedings Volume 1564, (1991) https://doi.org/10.1117/12.49721

KEYWORDS: Image filtering, Spatial light modulators, Optical correlators, Optical filters, Polarizers, Phase measurement, Spatial filters, Error analysis, Phase only filters, Computer simulations

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Proceedings Article | 1 September 1990 Paper

Rapid traversal of an image database using binary synthetic discriminant filters

Max Reid, Maria Bualat, Paul Ma, John Downie

Proceedings Volume 1296, (1990) https://doi.org/10.1117/12.21260

KEYWORDS: Databases, Optical filters, Image filtering, Binary data, Spatial light modulators, Linear filtering, Optical correlators, Optical signal processing, Modulation, Multiplexing

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Proceedings Article | 1 September 1990 Paper

Accuracy requirements of optical linear algebra processors in adaptive optics imaging systems

John Downie

Proceedings Volume 1296, (1990) https://doi.org/10.1117/12.21280

KEYWORDS: Mirrors, Adaptive optics, Wavefronts, Error analysis, Imaging systems, Actuators, Atmospheric optics, Optical signal processing, Computer programming, Linear algebra

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Proceedings Article | 1 September 1990 Paper

Efficient optical architecture for sparsely connected neural networks

Butler Hine, John Downie, Max Reid

Proceedings Volume 1296, (1990) https://doi.org/10.1117/12.21283

KEYWORDS: Holograms, Neural networks, Sensors, Diffraction gratings, Spatial frequencies, Holography, Neurons, Imaging systems, Network architectures, Diffraction

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Proceedings Article | 1 July 1990 Paper

Adaptive holographic implementation of a neural network

John Downie, Butler Hine, Max Reid

Proceedings Volume 1247, (1990) https://doi.org/10.1117/12.19617

KEYWORDS: Holograms, Holography, Neurons, Neural networks, Optical networks, Network architectures, Spatial light modulators, Diffraction, Computer generated holography, Cameras

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