Dr. Tamer F. Refaat Profile

Dr. Tamer F. Refaat

Sr Research Scientist at NASA Langley Research Ctr

SPIE Involvement:

Conference Program Committee | Author

Publications (41)

Proceedings Article | 24 October 2018 Paper

Paper

Airborne, direct-detection, 2-um triple-pulse IPDA lidar for simultaneous and independent atmospheric water vapor and carbon dioxide active remote sensing

Tamer Refaat, Mulugeta Petros, Upendra Singh, Charles Antill, Teh-Hwa Wong, Ruben Remus, Karl Reithmaier, Jane Lee, Stephen Bowen, Bryant Taylor, Angela Welters, Anna Noe, Syed Ismail

Proceedings Volume 10779, 1077902 (2018) https://doi.org/10.1117/12.2324785

KEYWORDS: LIDAR, Carbon monoxide, Transmitters, Pulsed laser operation, Atmospheric modeling, Data acquisition, Telescopes, Absorption, Sensors, Receivers

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Proceedings Article | 24 October 2018 Paper

Paper

Laser energy monitor for triple-pulse 2-um IPDA lidar application

Tamer Refaat, Mulugeta Petros, Jane Lee, Teh-Hwa Wong, Ruben Remus, Upendra Singh

Proceedings Volume 10779, 1077905 (2018) https://doi.org/10.1117/12.2324782

KEYWORDS: Laser energy, Calibration, Signal to noise ratio, LIDAR, Sensors, Analog electronics, Pulsed laser operation, Absorption, Carbon monoxide, Signal detection

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Proceedings Article | 21 November 2017 Open Access

Open Access

Paper

Development and evaluation of a high sensitivity dial system for profiling atmospheric CO2

S. Ismail, G. Koch, T. Refaat, M. N. Abedin, J. Yu, U. Singh

Proceedings Volume 10566, 105661I (2017) https://doi.org/10.1117/12.2308246

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Proceedings Article | 17 November 2017 Open Access

Open Access

Paper

Column Co2 measurement from an airborne solid state double-pulsed 2-micron integrated path differential absorption lidar

U. Singh, J. Yu, M. Petros, T. Refaat, R. Remus, J. Fay, K. Reithmaier

Proceedings Volume 10563, 105630C (2017) https://doi.org/10.1117/12.2304210

KEYWORDS: Carbon monoxide, LIDAR, Transmitters, Sensors, Absorption, Gas lasers, Pulsed laser operation, Atmospheric modeling, Telescopes, Global Positioning System

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Proceedings Article | 25 September 2017 Open Access

Open Access

Paper

Column carbon dioxide and water vapor measurements by an airborne triple-pulse integrated path differential absorption lidar – novel lidar technologies and techniques with path to space

U. Singh, M. Petros, T. Refaat, J. Yu, S. Ismail

Proceedings Volume 10562, 105621R (2017) https://doi.org/10.1117/12.2296219

KEYWORDS: LIDAR, Transmitters, Carbon monoxide, Sensors, Absorption, Pulsed laser operation, Astronomical imaging, Active remote sensing, Aerospace engineering, Space telescopes

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Proceedings Article | 7 September 2017 Paper

Paper

Progress on development of an airborne two-micron IPDA lidar for water vapor and carbon dioxide column measurements

Upendra Singh, Mulugeta Petros, Tamer Refaat, Jirong Yu, Charles Antill, Bryant Taylor, Stephen Bowen, Angela Welters, Ruben Remus, Teh-Hwa Wong, Karl Reithmaier, Jane Lee, Syed Ismail

Proceedings Volume 10406, 1040603 (2017) https://doi.org/10.1117/12.2276206

KEYWORDS: LIDAR, System integration, Active remote sensing, Absorption, Atmospheric laser remote sensing, Carbon dioxide, Transmitters, Packaging, Receivers, Mercury cadmium telluride

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Proceedings Article | 7 December 2016 Presentation

Presentation

Airborne 2-micron IPDA Lidar for atmospheric CO2 measurement (Conference Presentation)

Jirong Yu, Mulugeta Petros, Tamer Refaat, Upendra Singh

Proceedings Volume 9977, 997704 (2016) https://doi.org/10.1117/12.2236705

KEYWORDS: LIDAR, Carbon dioxide, Absorption, Clouds, Remote sensing, Systems engineering, Current controlled current source

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Proceedings Article | 24 October 2016 Paper

Paper

Airborne lidar for simultaneous measurement of column CO2 and water vapor in the atmosphere

Upendra Singh, Mulugeta Petros, Tamer Refaat, Charles Antill, Ruben Remus, Jirong Yu

Proceedings Volume 10006, 1000602 (2016) https://doi.org/10.1117/12.2245509

KEYWORDS: LIDAR, Absorption, Pulsed laser operation, Carbon monoxide, Sensors, Telescopes, Space telescopes, Transmitters, Data acquisition, Receivers

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Proceedings Article | 5 May 2016 Paper

Paper

Wavelength locking to CO2 absorption line-center for 2-um pulsed IPDA lidar application

Tamer Refaat, Mulugeta Petros, Charles Antill, Upendra Singh, Jirong Yu

Proceedings Volume 9879, 987904 (2016) https://doi.org/10.1117/12.2224950

KEYWORDS: Carbon dioxide, LIDAR, Carbon dioxide lasers, Absorption, Semiconductor lasers, Signal detection, Sensors, Modulation, Transmitters, Laser sources

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Proceedings Article | 5 May 2016 Paper

Paper

2-micron triple-pulse integrated path differential absorption lidar development for simultaneous airborne column measurements of carbon dioxide and water vapor in the atmosphere

Upendra Singh, Mulugeta Petros, Tamer Refaat, Jirong Yu

Proceedings Volume 9879, 987902 (2016) https://doi.org/10.1117/12.2223681

KEYWORDS: LIDAR, Absorption, Carbon dioxide lasers, Carbon dioxide, Sensors, Transmitters, Data acquisition, Receivers, Telescopes, Pulsed laser operation

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Proceedings Article | 20 October 2015 Paper

Paper

Double-pulsed 2-micron lidar validation for atmospheric CO2 measurements

Upendra Singh, Tamer Refaat, Jirong Yu, Mulugeta Petros, Ruben Remus

Proceedings Volume 9645, 964502 (2015) https://doi.org/10.1117/12.2196489

KEYWORDS: Carbon dioxide, LIDAR, Sensors, Transmitters, Clouds, Carbon dioxide lasers, Data modeling, Ocean optics, Absorption, Laser energy

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Proceedings Article | 1 September 2015 Paper

Paper

Development of double- and tripled-pulsed 2-micron IPDA Lidars for column CO2 measurement

Upendra Singh, Jirong Yu, Mulugeta Petros, Tamer Refaat, Ruben Remus, Karl Reithmaier

Proceedings Volume 9612, 961204 (2015) https://doi.org/10.1117/12.2191023

KEYWORDS: Carbon dioxide, LIDAR, Carbon dioxide lasers, Absorption, Atmospheric monitoring, Active remote sensing, Sensors, Remote sensing, Transmitters, Carbon monoxide

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Proceedings Article | 23 October 2014 Paper

Paper

Airborne 2-micron double-pulsed integrated path differential absorption lidar for column CO2 measurement

Upendra Singh, Jirong Yu, Mulugeta Petros, Tamer Refaat, Ruben Remus, James Fay, Karl Reithmaier

Proceedings Volume 9246, 924602 (2014) https://doi.org/10.1117/12.2069670

KEYWORDS: Carbon dioxide, LIDAR, Transmitters, Carbon dioxide lasers, Sensors, Absorption, Pulsed laser operation, Telescopes, Global Positioning System, Earth's atmosphere

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Proceedings Article | 20 October 2014 Paper

Paper

Laser energy monitor for double-pulsed 2-um IPDA lidar application

Tamer Refaat, Mulugeta Petros, Ruben Remus, Jirong Yu, Upendra Singh

Proceedings Volume 9246, 924606 (2014) https://doi.org/10.1117/12.2070998

KEYWORDS: Sensors, Laser energy, Pulsed laser operation, LIDAR, Calibration, Signal to noise ratio, Atmospheric laser remote sensing, Signal detection, Carbon dioxide, Absorption

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Proceedings Article | 17 September 2013 Paper

Paper

Efficient 1.6 micron laser source for methane DIAL

Timothy Shuman, Ralph Burnham, Amin Nehrir, Syed Ismail, Johnathan Hair, Tamer Refaat

Proceedings Volume 8872, 88720A (2013) https://doi.org/10.1117/12.2024383

KEYWORDS: Optical parametric oscillators, Methane, Transmitters, Pulsed laser operation, Ferroelectric materials, Output couplers, Laser sources, Resonators, LIDAR, Fiber Bragg gratings

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Proceedings Article | 17 September 2013 Paper

Paper

Development of a pulsed 2-micron integrated path differential absorption lidar for CO2 measurement

Upendra Singh, Jirong Yu, Mulugeta Petros, Tamer Refaat, Karl Reithmaier

Proceedings Volume 8872, 887209 (2013) https://doi.org/10.1117/12.2028245

KEYWORDS: Carbon dioxide, LIDAR, Carbon dioxide lasers, Sensors, Transmitters, Absorption, Atmospheric sensing, Pulsed laser operation, Earth's atmosphere, Active remote sensing

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Proceedings Article | 28 August 2010 Paper

Paper

Infrared detectors overview in the short-wave infrared to far-infrared for CLARREO mission

M. Nurul Abedin, Martin Mlynczak, Tamer Refaat

Proceedings Volume 7808, 78080V (2010) https://doi.org/10.1117/12.863125

KEYWORDS: Sensors, Infrared sensors, Mercury cadmium telluride, Infrared detectors, Infrared radiation, Silicon, Photovoltaics, Far infrared, Pyroelectric detectors, Short wave infrared radiation

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SPIE Journal Paper | 1 August 2007

Infrared phototransistor validation for atmospheric remote sensing application using the Raman-shifted eye-safe aerosol lidar

Tamer Refaat, Syed Ismail, Terry Mack, M. Nurul Abedin, Shane Mayor, Scott Spuler, Upendra Singh

OE, Vol. 46, Issue 08, 086001, (August 2007) https://doi.org/10.1117/12.10.1117/1.2772280

KEYWORDS: Phototransistors, LIDAR, Sensors, Avalanche photodetectors, Atmospheric sensing, Signal to noise ratio, Infrared sensors, Remote sensing, Indium gallium arsenide, Infrared photography

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Proceedings Article | 7 September 2006 Paper

Paper

InGaAsSb/AlGaAsSb heterojunction phototransistors for infrared applications

Tamer Refaat, M. Nurul Abedin, Oleg Sulima, Syed Ismail, Upendra Singh

Proceedings Volume 6295, 629503 (2006) https://doi.org/10.1117/12.680684

KEYWORDS: Sensors, Phototransistors, Signal detection, Quantum efficiency, Infrared sensors, Heterojunctions, Infrared detectors, Signal to noise ratio, Indium gallium arsenide, Infrared radiation

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Proceedings Article | 7 September 2006 Paper

Paper

Bias selective operation of Sb-based two-color photodetectors

M. Abedin, T. Refaat, I. Bhat, Y. Xiao, D. Johnson

Proceedings Volume 6297, 629709 (2006) https://doi.org/10.1117/12.680969

KEYWORDS: Sensors, Photodetectors, Gallium antimonide, Photodiodes, Indium gallium arsenide antimonide, Multilayers, Thin films, Diodes, Lead, Infrared detectors

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Proceedings Article | 1 September 2006 Paper

Paper

Remote pulsed laser Raman spectroscopy system for detecting water, ice, and hydrous minerals

Christopher Garcia, M. Nurul Abedin, Shiv Sharma, Anupam Misra, Syed Ismail, Upendra Singh, Tamer Refaat, Hani Elsayed-Ali, Steve Sandford

Proceedings Volume 6302, 630215 (2006) https://doi.org/10.1117/12.680879

KEYWORDS: Raman spectroscopy, Minerals, Spectrographs, Molecules, Telescopes, Pulsed laser operation, Sensors, Charge-coupled devices, Calcite, Photons

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Proceedings Article | 18 May 2006 Paper

Paper

Room-temperature AlGaAsSb/InGaAsSb heterojunction phototransistors

K. Swaminathan, O. Sulima, T. Refaat, T. Dillon, E. Marchena, N. Faleev, M. Abedin, U. Singh, D. Prather

Proceedings Volume 6232, 62320P (2006) https://doi.org/10.1117/12.664971

KEYWORDS: Diffractive optical elements, Heterojunctions, Phototransistors, Liquid phase epitaxy, Metalorganic chemical vapor deposition, Indium gallium arsenide antimonide, Doping, Glasses, Crystals, Gallium antimonide

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SPIE Journal Paper | 1 April 2006

Modeling of the temperature-dependent spectral response of In_1–χGa_χSb infrared photodetectors

Juan González-Cuevas, Tamer Refaat, M. Nurul Abedin, Hani Elsayed-Ali

OE, Vol. 45, Issue 04, 044001, (April 2006) https://doi.org/10.1117/12.10.1117/1.2192772

KEYWORDS: Diffusion, Photodetectors, Gallium, Antimony, Gallium antimonide, Absorption, Electro optical modeling, Quantum efficiency, Thermal modeling, Infrared radiation

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SPIE Journal Paper | 1 December 2005 Open Access

Open Access

Sb-based two-color photodetector fabrication and characterization

Tamer Refaat, M. Nurul Abedin, Ishwara Bhat, Yegao Xiao

OE, Vol. 44, Issue 12, 120501, (December 2005) https://doi.org/10.1117/12.10.1117/1.2147576

KEYWORDS: Sensors, Gallium antimonide, Indium gallium arsenide antimonide, Photodetectors, Metals, Diodes, Vapor phase epitaxy, Antimony, Multilayers, Signal detection

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Proceedings Article | 29 August 2005 Paper

Paper

Characterization of dual-band infrared detectors for application to remote sensing

M. Nurul Abedin, Tamer Refaat, Yegao Xiao, Ishwara Bhat

Proceedings Volume 5883, 588307 (2005) https://doi.org/10.1117/12.614938

KEYWORDS: Sensors, Photodiodes, Gallium antimonide, Photodetectors, Infrared detectors, Indium gallium arsenide antimonide, Quantum efficiency, Infrared sensors, Photovoltaic detectors, Infrared radiation

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Proceedings Article | 19 August 2005 Paper

Paper

MOVPE of GaSb/InGaAsSb multilayers and fabrication of dual band photodetectors

Yegao Xiao, Ishwara Bhat, Tamer Refaat, M. Abedin, Qinghui Shao

Proceedings Volume 5881, 588101 (2005) https://doi.org/10.1117/12.614208

KEYWORDS: Photodiodes, Photodetectors, Gallium antimonide, Multilayers, Indium gallium arsenide antimonide, Thin films, Antimony, Metals, Diodes, Infrared radiation

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Proceedings Article | 19 August 2005 Paper

Paper

III-V compound detectors for CO2 DIAL measurements

Tamer Refaat, M. Nurul Abedin, Oleg Sulima, Syed Ismail, Upendra Singh

Proceedings Volume 5887, 588706 (2005) https://doi.org/10.1117/12.619705

KEYWORDS: Sensors, Phototransistors, Indium gallium arsenide, Carbon monoxide, Quantum efficiency, Atmospheric monitoring, Signal to noise ratio, Capacitance, Atmospheric sensing, Signal detection

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Proceedings Article | 31 May 2005 Paper

Paper

Characterization of InGaAs linear array for applications to remote sensing

Christopher Garcia, Tamer Refaat, Glenn Farnsworth, M. Abedin, Hani Elsayed-Ali

Proceedings Volume 5783, (2005) https://doi.org/10.1117/12.603491

KEYWORDS: Staring arrays, Interference (communication), Indium gallium arsenide, Sensors, Quantum efficiency, Photodiodes, Cameras, Electrons, Remote sensing, Signal generators

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Proceedings Article | 19 May 2005 Paper

Paper

Characterization of custom-designed charge-coupled devices for applications to gas and aerosols monitoring sensorcraft instrument

Tamer Refaat, M. Nurul Abedin, Glenn Farnsworth, Christopher Garcia, Joseph Zawodny

Proceedings Volume 5798, (2005) https://doi.org/10.1117/12.603529

KEYWORDS: Charge-coupled devices, Interference (communication), Sensors, CCD image sensors, Quantum efficiency, Aerosols, Electronic circuits, Calibration, Tolerancing, Signal to noise ratio

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SPIE Journal Paper | 1 May 2005

Fabrication of Ge/Si quantum-dot infrared photodetector by pulsed laser deposition

Mohammed Hegazy, Tamer Refaat, M. Nurul Abedin, Hani Elsayed-Ali

OE, Vol. 44, Issue 05, 059702, (May 2005) https://doi.org/10.1117/12.10.1117/1.1907563

KEYWORDS: Germanium, Silicon, Photodetectors, Pulsed laser deposition, Infrared radiation, Sensors, Infrared photography, Multilayers, Quantum well infrared photodetectors, Quantum dots

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Proceedings Article | 4 November 2004 Paper

Paper

Progress of multicolor single detector to detector array development for remote sensing

M. Nurul Abedin, Tamer Refaat, Ishwara Bhat, Yegao Xiao, Sumith Bandara, Sarath Gunapala

Proceedings Volume 5543, (2004) https://doi.org/10.1117/12.559917

KEYWORDS: Sensors, Silicon, Gallium antimonide, Indium arsenide, Quantum efficiency, Absorption, Detector development, Remote sensing, Doping, Infrared sensors

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Proceedings Article | 30 August 2004 Paper

Paper

Characterization of InGaSb detectors for 1.0- to 2.4-µm applications

Tamer Refaat, M. Nurul Abedin, Upendra Singh, Vinay Bhagwat, Ishwara Bhat, Partha Dutta

Proceedings Volume 5406, (2004) https://doi.org/10.1117/12.542503

KEYWORDS: Sensors, Gallium antimonide, Semiconducting wafers, Zinc, Binary data, Doping, Remote sensing, Indium, Gallium, Antimony

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SPIE Journal Paper | 1 July 2004

AlGaAsSb/InGaAsSb phototransistors for 2-μm remote sensing applications

Tamer Refaat, M. Nurul Abedin, Oleg Sulima, Syed Ismail, Upendra Singh

OE, Vol. 43, Issue 07, (July 2004) https://doi.org/10.1117/12.10.1117/1.1760085

KEYWORDS: Sensors, Phototransistors, Indium gallium arsenide, Mercury cadmium telluride, Indium gallium arsenide antimonide, LIDAR, Absorption, Quantum efficiency, Remote sensing, Atmospheric sensing

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SPIE Journal Paper | 1 May 2004

Characterization of InGaSb/GaSb p-n photodetectors in the 1.0- to 2.4-µm wavelength range

Tamer Refaat, M. Nurul Abedin, Ishwara Bhat, Partha Dutta, Upendra Singh

OE, Vol. 43, Issue 05, (May 2004) https://doi.org/10.1117/12.10.1117/1.1695566

KEYWORDS: Gallium antimonide, Photodetectors, Sensors, Photodiodes, Quantum efficiency, Temperature metrology, Metals, Vapor phase epitaxy, Laser applications, Semiconducting wafers

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Proceedings Article | 23 December 2003 Paper

Paper

Infrared detector characterization for CO2 DIAL measurement

Tamer Refaat, M. Abedin, Grady Koch, Syed Ismail, Upendra Singh

Proceedings Volume 5154, (2003) https://doi.org/10.1117/12.504893

KEYWORDS: Sensors, Carbon monoxide, Indium gallium arsenide, Infrared detectors, LIDAR, Absorption, Signal detection, Indium gallium arsenide antimonide, Gas lasers, Mercury cadmium telluride

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Proceedings Article | 10 November 2003 Paper

Paper

Multicolor focal plane array detector technology: a review

M. Nurul Abedin, Tamer Refaat, Joseph Zawodny, Steve Sandford, Upendra Singh, Sumith Bandara, Sarath Gunapala, Ishwara Bhat, Norman Barnes

Proceedings Volume 5152, (2003) https://doi.org/10.1117/12.505887

KEYWORDS: Sensors, Quantum well infrared photodetectors, Staring arrays, Mercury cadmium telluride, Quantum efficiency, Long wavelength infrared, Infrared detectors, Infrared sensors, Infrared radiation, Quantum wells

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Proceedings Article | 10 October 2003 Paper

Paper

Characterization and analysis of InGaAsSb detectors

M. Nurul Abedin, Tamer Refaat, Ravindra Joshi, Oleg Sulima, Michael Mauk, Upendra Singh

Proceedings Volume 5074, (2003) https://doi.org/10.1117/12.486345

KEYWORDS: Sensors, Indium gallium arsenide antimonide, Signal detection, Absorption, Doping, Ionization, Carbon monoxide, Temperature metrology, LIDAR, Avalanche photodetectors

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SPIE Journal Paper | 1 September 2001

Drift-diffusion model for reach-through avalanche photodiodes

Tamer Refaat, Hani Elsayed-Ali, Russell DeYoung

OE, Vol. 40, Issue 09, (September 2001) https://doi.org/10.1117/12.10.1117/1.1396655

KEYWORDS: Avalanche photodetectors, Electrons, Diffusion, Instrument modeling, Absorption, Data modeling, Manufacturing, Ionization, Device simulation, Doping

SPIE Journal Paper | 1 October 2000

Comparison between super low ionization ratio and reach through avalanche photodiode structures

Tamer Refaat, Gary Halama, Russell De Young

OE, Vol. 39, Issue 10, (October 2000) https://doi.org/10.1117/12.10.1117/1.1308925

KEYWORDS: Avalanche photodetectors, Sensors, Ionization, Absorption, Calibration, Signal detection, Lasers, Optical engineering, Avalanche photodiodes, LIDAR

Proceedings Article | 20 October 1999 Paper

Paper

Advanced water-vapor lidar detection system for aircraft and space deployment

Tamer Refaat, William Luck, Russell De Young

Proceedings Volume 3756, (1999) https://doi.org/10.1117/12.366419

KEYWORDS: Signal detection, LIDAR, Avalanche photodetectors, Sensors, Analog electronics, Troposphere, Signal to noise ratio, Digital electronics, Lasers, Space telescopes

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Proceedings Article | 31 October 1997 Paper

Paper

Advanced detectors, optics, and waveform digitizers for aircraft DIAL water vapor measurements

Russell De Young, Gary Halama, William Luck, K. Ellis, Stephen Sandford, Edward Browell, Tamer Refaat

Proceedings Volume 3127, (1997) https://doi.org/10.1117/12.279067

KEYWORDS: Sensors, Avalanche photodetectors, Information operations, LIDAR, Receivers, Signal to noise ratio, Telescopes, Signal detection, Analog electronics, Optical design

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Showing 5 of 41 publications

Conference Committee Involvement (4)

Lidar and Optical Remote Sensing for Environmental Monitoring XVII

2 December 2024 | Kaohsiung, Taiwan

Lidar Remote Sensing for Environmental Monitoring XVI

24 September 2018 | Honolulu, Hawaii, United States

Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing

11 September 2018 | Berlin, Germany

Lidar Remote Sensing for Environmental Monitoring XV

4 April 2016 | New Delhi, India

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