Dr. Alan D. Kersey Profile

Dr. Alan D. Kersey

CEO at CytoVeris Inc

SPIE Involvement:

Author | Instructor

Publications (68)

Proceedings Article | 5 March 2021 Presentation

Raman spectroscopy based molecular bar coding: realizing the value of high wavenumber region in breast cancer detection

Rishikesh Pandey, Gary Root, Machele Riccio, Michael Sapack, Noel Daigneault, David Fournier, Patrick Curry, Alan Kersey

Proceedings Volume 11631, 1163105 (2021) https://doi.org/10.1117/12.2578933

KEYWORDS: Breast cancer, Raman spectroscopy, Tissues, Surgery, Molecular spectroscopy, Breast, Error analysis, Tissue optics, Statistical analysis, Pathology

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Proceedings Article | 28 September 2015 Paper

Very high sensor-density multiplexing using a wavelength-to-time domain reflectometry approach based on a rapidly swept akinetic laser

M. Minneman, E. Hoover, P. Boschert, J. Ensher, M. Crawford, D. Derrickson, A. Kersey

Proceedings Volume 9634, 96342B (2015) https://doi.org/10.1117/12.2205455

KEYWORDS: Fiber Bragg gratings, Sensors, Reflectometry, Pulsed laser operation, Multiplexing, Reflectivity, Sensing systems, Optical design, Fiber lasers, Time division multiplexing

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Proceedings Article | 17 October 2012 Paper

Fiber optic sensors shine bright: industrial applications where FOS bring differentiated performance/value

Alan Kersey

Proceedings Volume 8421, 84210F (2012) https://doi.org/10.1117/12.2008245

KEYWORDS: Fiber optics sensors, Sensors, Fiber Bragg gratings, Sensing systems, Interferometry, Raman scattering, Patents, Acoustics, Fiber optics, Rayleigh scattering

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Proceedings Article | 9 November 2000 Paper

Precision tunable grating devices for sensing and communication networks

A. Kersey

Proceedings Volume 4185, 41850L (2000) https://doi.org/10.1117/12.2302164

KEYWORDS: Networks, Bragg gratings, Telecommunications, Optical networks

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Proceedings Article | 9 December 1999 Paper

CiDRA: leveraging mulitchannel telecommunications technology for enhanced downhole monitoring capabilities in the oil and gas industry

Alan Kersey, F. Didden

Proceedings Volume 3860, (1999) https://doi.org/10.1117/12.372966

KEYWORDS: Sensors, Fiber Bragg gratings, Telecommunications, Fiber optics, Fiber optics sensors, Networks, Internet, Wavelength division multiplexing, Phase measurement, Video

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Proceedings Article | 1 September 1999 Paper

Optical fiber sensors for downwell monitoring applications in the oil and gas industry

Alan Kersey

Proceedings Volume 3746, 37463Y (1999) https://doi.org/10.1117/12.2302132

KEYWORDS: Sensors, Fiber optics sensors, Transducers, Acoustics, Gas sensors, Raman spectroscopy, Temperature sensors, Profiling, High temperature raman spectroscopy, Bragg gratings

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Proceedings Article | 6 June 1997 Paper

Ultrahigh-sensitivity strain sensing using fiber cavity etalons

E. Friebele, Martin Putnam, Alan Kersey, A. Greenblatt, Gregory Ruthven, Michael Krim, Kenneth Gottschalck

Proceedings Volume 3042, (1997) https://doi.org/10.1117/12.275728

KEYWORDS: Sensors, ZBLAN, Fiber optics sensors, Capacitance, Silica, Fabry–Perot interferometers, Optical fibers, Fused quartz, Single mode fibers, Glasses

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Proceedings Article | 6 June 1997 Paper

Transient load monitoring on a composite hull ship using distributed fiber optic Bragg grating sensors

Alan Kersey, Michael Davis, Timothy Berkoff, Anthony Dandridge, R. Jones, Tsung-Ein Tsai, Gary Cogdell, Gunnar Wang, G. Havsgaard, Karianne Pran, Sverre Knudsen

Proceedings Volume 3042, (1997) https://doi.org/10.1117/12.275763

KEYWORDS: Sensors, Composites, Fiber Bragg gratings, Fiber optics sensors, Interferometers, Fiber optics, Interferometry, Skin, Phase shifts, Lead

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Proceedings Article | 23 May 1997 Paper

Dynamic strain monitoring of an in-use interstate bridge using fiber Bragg grating sensors

Michael Davis, Alan Kersey, Timothy Berkoff, R. Jones, Rola Idriss, M. Kodinduma

Proceedings Volume 3043, (1997) https://doi.org/10.1117/12.274634

KEYWORDS: Sensors, Fiber Bragg gratings, Bridges, Chlorine, Wavelength division multiplexing, Multiplexers, Multiplexing, Optical fibers, Dynamical systems, Optical filters

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Proceedings Article | 17 February 1997 Paper

Fiber Bragg grating based systems for transportation infrastructure monitoring

Michael Davis, Alan Kersey

Proceedings Volume 2902, (1997) https://doi.org/10.1117/12.267146

KEYWORDS: Fiber Bragg gratings, Sensors, Bridges, Dynamical systems, Optical fibers, Switches, Wavelength division multiplexing, Signal detection, Optical filters, Multiplexing

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Proceedings Article | 27 November 1996 Paper

Fiber Bragg grating sensor demodulation system using in-fiber long period grating filters

Heather Patrick, Alan Kersey, J. Pedrazzani, Ashish Vengsarkar

Proceedings Volume 2838, (1996) https://doi.org/10.1117/12.259816

KEYWORDS: Fiber Bragg gratings, Sensors, Optical filters, Demodulation, Linear filtering, Temperature metrology, Actuators, Electronic filtering, Cladding, Structured optical fibers

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Proceedings Article | 27 November 1996 Paper

Simultaneous measurement of temperature and strain using fiber Bragg gratings and Brillouin scattering

Michael Davis, Alan Kersey

Proceedings Volume 2838, (1996) https://doi.org/10.1117/12.259789

KEYWORDS: Fiber Bragg gratings, Scattering, Sensors, Temperature metrology, Optical fibers, Interferometers, Laser beam diagnostics, Signal detection, Sensing systems, Fiber optics sensors

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Proceedings Article | 27 November 1996 Paper

Experimental verification of cantilever plate deformation magnitudes using wavelength division multiplexed Bragg grating sensors

R. Jones, David Bellemore, Timothy Berkoff, James Sirkis, Martin Putnam, E. Friebele, Alan Kersey

Proceedings Volume 2838, (1996) https://doi.org/10.1117/12.259818

KEYWORDS: Sensors, Fiber Bragg gratings, Actuators, Multiplexing, Algorithm development, Error analysis, Analytical research, Wavelength division multiplexing, Sensor performance, Optical filters

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Proceedings Article | 13 November 1996 Paper

Fiber optic sensor system for bridge monitoring with both static load and dynamic modal sensing capabilities

Michael Davis, David Bellemore, Timothy Berkoff, Alan Kersey, Martin Putnam, Rola Idriss, M. Kodinduma

Proceedings Volume 2946, (1996) https://doi.org/10.1117/12.259140

KEYWORDS: Sensors, Fiber Bragg gratings, Bridges, Optical fibers, Chlorine, Fiber optics sensors, Wavelength division multiplexing, Switches, Signal detection, Multiplexing

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Proceedings Article | 25 October 1996 Paper

Progress toward the development of practical fiber Bragg grating instrumentation systems

Alan Kersey, Michael Davis, Timothy Berkoff, David Bellemore, Kee Koo, R. Jones

Proceedings Volume 2839, (1996) https://doi.org/10.1117/12.255381

KEYWORDS: Fiber Bragg gratings, Sensors, Interferometers, Signal detection, Optical filters, Bridges, Interferometry, Glasses, Fiber lasers, Absorption

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Fiber Bragg gratings (FBGs) are simple intrinsic sensing elements which can be 'photo-imprinted' into fiber and represent one of the most exciting developments in the area of fiber optic sensing, probably since the inception of the all-fiber interferometer. These devices are based on the photosensitivity of optical fibers: Conventional tele- communications grade germanium-doped (Ge) optical fiber has been shown to exhibit a significant photosensitive response when illuminated with UV light in the region of 248 nm, a wavelength which corresponds to an absorption band, or 'color center,' in the glass associated with the Ge/SiO₂ bonding. Absorption of the UV light in the glass breaks bonds creating changes in color centers which modify the absorption characteristics of the glass. This change in absorption results in a shift in the index of the glass at wavelengths removed from the absorption region through the Krammers-Kronig relationship. As the Ge dopant is usually confined only to the core (light guiding) region of the fiber, the effect is observed only in the core. The required UV light can be readily produced by various sources: KrF excimer lasers, dye lasers, frequency doubled Ar lasers and quadrupled Nd:YAG lasers. The optical power levels produced by these sources vary, and the most common source used is the KrF laser which can produce intense pulses at 10 to 50 Hz repetition rates. Changes in index are generally on the order of 10^-3 or less, although recent work on fibers with enhanced photosensitive response (hydrogen- loaded fiber), index shifts of approximately 10^-2 have been reported. The advent of the holographic side- exposure and phase-mask techniques for writing gratings has made the devices readily available for widespread usage in fiber optic systems. Although the primary application area for Bragg gratings appears to be in the fiber communications field, there has been strong interest in FBG-based sensing, and progress in this area has been rapid with many significant developments over the past 5 years.

Proceedings Article | 30 May 1996 Paper

High-sensor-count Bragg grating instrumentation system for large-scale structural monitoring applications

Michael Davis, David Bellemore, Alan Kersey, Martin Putnam, E. Friebele, Rola Idriss, M. Kodindouma

Proceedings Volume 2718, (1996) https://doi.org/10.1117/12.240900

KEYWORDS: Sensors, Fiber Bragg gratings, Bridges, Switches, Signal detection, Data centers, Structural monitoring, Optical filters, Fourier transforms, Optical components

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Proceedings Article | 30 May 1996 Paper

Separating the temperature and strain effects on fiber Bragg grating sensors using stimulated Brillouin scattering

Michael Davis, Alan Kersey

Proceedings Volume 2718, (1996) https://doi.org/10.1117/12.240868

KEYWORDS: Fiber Bragg gratings, Scattering, Optical fibers, Sensors, Temperature metrology, Sensing systems, Chlorine, Laser scattering, Fiber lasers, Interferometers

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Proceedings Article | 30 May 1996 Paper

Cantilever plate deformation monitoring using wavelength division multiplexed fiber Bragg grating sensors

R. Jones, Timothy Berkoff, David Bellemore, D. Early, James Sirkis, Martin Putnam, E. Friebele, Alan Kersey

Proceedings Volume 2718, (1996) https://doi.org/10.1117/12.240899

KEYWORDS: Sensors, Fiber Bragg gratings, Finite element methods, Multiplexing, Chemical elements, Data modeling, Algorithm development, Frequency division multiplexing, Aluminum, Data acquisition

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Proceedings Article | 30 May 1996 Paper

Fiber optic velocity sensor for monitoring of structural vibrations

Larry Fabiny, Alan Kersey

Proceedings Volume 2718, (1996) https://doi.org/10.1117/12.240872

KEYWORDS: Sensors, Fiber optics sensors, Fiber optics, Doppler effect, Interferometers, Fiber optics tests, Velocity measurements, Interferometry, Magnetic sensors, Fiber lasers

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Proceedings Article | 1 May 1996 Paper

High-strain monitoring in composite-wrapped concrete cylinders using embedded fiber Bragg grating arrays

Michael Davis, David Bellemore, Martin Putnam, Alan Kersey, Kerry Slattery, Kelli Corona, Mindy Schowengerdt

Proceedings Volume 2721, (1996) https://doi.org/10.1117/12.239121

KEYWORDS: Composites, Fiber Bragg gratings, Sensors, Electronic filtering, Fabry–Perot interferometers, Optical filters, Sensing systems, Structured optical fibers, Switches, Chlorine

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Proceedings Article | 1 May 1996 Paper

Strain-displacement mapping for a precision truss using Bragg gratings and identified mode shapes

Albert Bosse, George Kirby, David Bellemore, Alan Kersey, Tsung-Ein Tsai, E. Friebele

Proceedings Volume 2717, (1996) https://doi.org/10.1117/12.239037

KEYWORDS: Sensors, Fiber Bragg gratings, Interferometers, Digital signal processing, Laser systems engineering, Antennas, Data acquisition, Associative arrays, Analytical research, Global Positioning System

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Proceedings Article | 22 April 1996 Paper

Damage assessment of a full-scale bridge using an optical fiber monitoring system

M. Kodindouma, Rola Idriss, Alan Kersey, Michael Davis, David Bellemore, E. Friebele, Martin Putnam

Proceedings Volume 2719, (1996) https://doi.org/10.1117/12.238849

KEYWORDS: Bridges, Sensors, Fiber Bragg gratings, Optical fibers, Lanthanum, Analytical research, Fiber optics sensors, Fourier transforms, Finite element methods, 3D modeling

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Proceedings Article | 19 May 1995 Paper

Development of fiber sensors for structural monitoring

Alan Kersey, Michael Davis, David Bellemore

Proceedings Volume 2456, (1995) https://doi.org/10.1117/12.209771

KEYWORDS: Fiber Bragg gratings, Sensors, Fiber optics sensors, Structural monitoring, Optical filters, Chlorine, Prototyping, Structured optical fibers, Electronic filtering, Signal detection

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Proceedings Article | 12 May 1995 Paper

Fabrication and application of low-cost optical fiber sensor arrays for industrial and commercial applications

E. Friebele, Charles Askins, Martin Putnam, Glen Williams, Alan Kersey, A. Fosha, J. Florio, R. Donti, R. Blosser

Proceedings Volume 2447, (1995) https://doi.org/10.1117/12.209344

KEYWORDS: Fiber Bragg gratings, Composites, Sensors, Fiber optics sensors, Reflectivity, Optical fibers, Smart structures, Excimer lasers, Polymers, Finite element methods

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Proceedings Article | 20 April 1995 Paper

Hybrid time- and wavelength-division multiplexed fiber Bragg grating sensor array

Timothy Berkoff, Michael Davis, David Bellemore, Alan Kersey, Glen Williams, Martin Putnam

Proceedings Volume 2444, (1995) https://doi.org/10.1117/12.207684

KEYWORDS: Sensors, Fiber Bragg gratings, Multiplexing, Optical components, Fabry–Perot interferometers, Composites, Wavelength division multiplexing, Time division multiplexing, Reflectivity, Fabry–Perot interferometry

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Proceedings Article | 20 April 1995 Paper

Location and magnitude of impact detection in composite plates using neural networks

Richard Jones, James Sirkis, E. Friebele, Alan Kersey

Proceedings Volume 2444, (1995) https://doi.org/10.1117/12.207697

KEYWORDS: Neural networks, Sensors, Data modeling, Composites, Damage detection, Aluminum, Error analysis, Analytical research, Computer simulations, Coastal modeling

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Proceedings Article | 20 April 1995 Paper

Serially configured matched filter interrogation technique for Bragg grating arrays

Michael Davis, Alan Kersey

Proceedings Volume 2444, (1995) https://doi.org/10.1117/12.207685

KEYWORDS: Fiber Bragg gratings, Sensors, Optical filters, Signal detection, Receivers, Electronic filtering, Demodulation, Signal attenuation, Optical components, Multiplexing

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Proceedings Article | 20 April 1995 Paper

Design and performance of a fiber Bragg grating distributed strain sensor system

Michael Davis, David Bellemore, Timothy Berkoff, Alan Kersey

Proceedings Volume 2446, (1995) https://doi.org/10.1117/12.207731

KEYWORDS: Fiber Bragg gratings, Sensors, Optical filters, Computing systems, Multiplexing, Optical design, Prototyping, Demodulation, Optical fibers, Distributed computing

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Proceedings Article | 20 April 1995 Paper

Optimal sensor layout for shape estimation from strain sensors

George Kirby, Douglas Lindner, Michael Davis, Alan Kersey

Proceedings Volume 2444, (1995) https://doi.org/10.1117/12.207709

KEYWORDS: Sensors, Fiber Bragg gratings, Error analysis, Beam shaping, Associative arrays, Shape analysis, Analytical research, Smart materials, Damage detection, Fiber optics sensors

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Proceedings Article | 1 November 1994 Paper

Fiber optic Bragg grating laser sensors

Alan Kersey, Kee Koo, Michael Davis

Proceedings Volume 2292, (1994) https://doi.org/10.1117/12.191824

KEYWORDS: Fiber Bragg gratings, Sensors, Fiber lasers, Fiber optics sensors, Fiber optics, Laser optics, Interferometers, Reflectors, Interferometry, Erbium

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Proceedings Article | 4 October 1994 Paper

Fiber optic sensors for distributed vibration monitoring

Timothy Berkoff, Michael Davis, Alan Kersey

Proceedings Volume 2264, (1994) https://doi.org/10.1117/12.188868

KEYWORDS: Sensors, Fiber Bragg gratings, Interferometers, Interferometry, Fiber optics sensors, Modulation, Multiplexing, Light, Phase shift keying, Phase shifts

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Proceedings Article | 21 September 1994 Paper

Visibility-tuning technique for addressing fiber sensor networks

Michael Davis, Alan Kersey

Proceedings Volume 2294, (1994) https://doi.org/10.1117/12.187390

KEYWORDS: Sensors, Modulation, Interferometers, Visibility, Multiplexing, Phase shift keying, Phase modulation, Interferometry, Modulators, Frequency modulation

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Proceedings Article | 21 September 1994 Paper

Subcarrier-based path-integrating strain sensor array utilizing fiber Bragg gratings

Michael Davis, Alan Kersey, Timothy Berkoff, David Bellemore

Proceedings Volume 2294, (1994) https://doi.org/10.1117/12.187387

KEYWORDS: Fiber Bragg gratings, Sensors, Phase shift keying, Modulation, Wave propagation, Electronic filtering, Optical components, Fiber optics sensors, Optical fibers, Phase measurement

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Proceedings Article | 21 September 1994 Paper

Source-structure-induced measurement errors in fiber Bragg grating sensor arrays

Timothy Berkoff, Michael Davis, Alan Kersey

Proceedings Volume 2294, (1994) https://doi.org/10.1117/12.187401

KEYWORDS: Modulation, Fiber Bragg gratings, Sensors, Light, Analytical research, Structured optical fibers, Coastal modeling, Tunable filters, Error analysis, Optical filters

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