Dr. Linh Ngo Phong Profile

Dr. Linh Ngo Phong

at Canadian Space Agency

SPIE Involvement:

Author

Publications (29)

Proceedings Article | 18 September 2018 Paper

A low resource imaging radiometer for nanosatellite based fire diagnosis

Linh Ngo Phong, Denis Dufour, Joshua Johnston, Claude Chevalier, Patrice Côté, Bruno Fisette, Min Wang, François Châteauneuf

Proceedings Volume 10765, 1076502 (2018) https://doi.org/10.1117/12.2320661

KEYWORDS: Sensors, Telescopes, Mid-IR, Long wavelength infrared, Cameras, Transmittance, Radiometry, Microbolometers

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Proceedings Article | 21 November 2017 Open Access

Radiometric packaging of uncooled bolometric infrared focal plane arrays

Sonia García-Blanco, Timothy Pope, Patrice Côté, Mélanie Leclerc, Linh Ngo Phong, François Châteauneuf

Proceedings Volume 10566, 105662V (2017) https://doi.org/10.1117/12.2308275

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Proceedings Article | 21 November 2017 Open Access

Miniature high-performance infrared spectrometer for space applications

Roman Kruzelecky, Emile Haddad, Brian Wong, Denis Lafrance, Wes Jamroz, Asoke Ghosh, Wanping Zheng, Linh Phong

Proceedings Volume 10568, 105680Q (2017) https://doi.org/10.1117/12.2307999

KEYWORDS: Spectroscopy, Infrared spectroscopy, Signal to noise ratio, Sensors, FT-IR spectroscopy, Camera shutters, Detector arrays, Transmittance, Integrated optics, Spectral resolution

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Proceedings Article | 29 August 2017 Paper

BiPbSrCaCuO detectors for laser power metering

Linh Ngo Phong

Proceedings Volume 10313, 1031346 (2017) https://doi.org/10.1117/12.2283946

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Proceedings Article | 20 February 2017 Paper

Uncooled midwave infrared sensors for spaceborne assessment of fire characteristics

Linh Ngo Phong, Francis Picard, Jacques-Edmond Paultre, Francis Généreux, Denis Dufour, François Châteauneuf

Proceedings Volume 10116, 101160N (2017) https://doi.org/10.1117/12.2250968

KEYWORDS: Mid-IR, Bolometers, Infrared sensors, Remote sensing, Microbolometers, Resistance, Semiconducting wafers, Wheatstone bridges, Readout integrated circuits

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Spaceborne assessment of fire characteristics relies on radiance measurement of fire pixels and non-fire pixels mainly in the midwave infrared (MWIR). Because ambient temperature non-fire pixels have low thermal emission in this spectral range, it remains a challenge to retrieve fire characteristics with the desired accuracy. This paper reports on uncooled microbolometers specially designed with low noise equivalent power (NEP) to enable fire diagnosis at MWIR wavelengths. Each microbolometer forming a 512x3 format array includes a Wheatstone bridge of one active, one blind, and two thermally shunted pixels followed by its own signal chain. Design analyses suggest the conditions for achieving the best NEP performance are: (i) the active, blind, and one shunt pixel have equal electrical resistances while the other shunt pixel has a larger resistance; (ii) the temperature difference between the active pixel and heat sink corresponds to about one-third the heat sink temperature; and (iii) the active and blind pixels have low thermal mass and conductance. Hardwired devices having different structural layouts were prepared for the validation of physical parameters and performance so that the suitable designs could be identified. After this, focal planes of 512x3 microbolometers were fabricated on readout electronics to allow further performance evaluation and development of staggered 1017x3 format arrays for a planned mission. The active pixel designs on the fabricated arrays exhibit a MWIR absorptance as high as 0.83 through implementation of a Salisbury screen absorber, a thermal conductance of ~ 67 nW/K, and a response time shorter than 10 ms. Their responsivities are found to be in good agreement with predictions of the design analysis. The effectiveness of an Al shield platform erected above the blind pixel was investigated, showing that certain designs are capable of attenuating the incident power by up to 24 times. Under optimal operating conditions an NEP of ~ 64 pW was derived from measurements in the spectral range of 3.4-4.2 um, which was corroborated by the probing results obtained on the on-wafer focal plane arrays. When using these arrays with an F/1 telescope to retrieve scenes of 400 K from low Earth orbits, a noise equivalent temperature difference of ~ 320 mK can be achieved.

Proceedings Article | 14 September 2016 Paper

Design and instrumentation of an airborne far infrared radiometer for in-situ measurements of ice clouds

Christian Proulx, Linh Ngo Phong, Frédéric Lamontagne, Min Wang, Bruno Fisette, Louis Martin, François Châteauneuf

Proceedings Volume 9973, 99730F (2016) https://doi.org/10.1117/12.2237927

KEYWORDS: Far infrared, Clouds, Microbolometers, Sensors, Telescopes, Black bodies, Mirrors, Optical filters, Cameras, Signal detection

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Proceedings Article | 27 February 2015 Paper

Far infrared microbolometers for radiometric measurements of ice cloud

Linh Ngo Phong, Christian Proulx, El-Hassane Oulachgar, François Châteauneuf

Proceedings Volume 9375, 93750G (2015) https://doi.org/10.1117/12.2076219

KEYWORDS: Microbolometers, Data acquisition, Staring arrays, Far infrared, Clouds, Temperature metrology, Bridges, Reflectivity, Semiconducting wafers, Coating

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Proceedings Article | 7 March 2014 Paper

Design and fabrication of net flux radiometers for Mars exploration

Christian Proulx, Linh Ngo Phong, François Châteauneuf

Proceedings Volume 8975, 897504 (2014) https://doi.org/10.1117/12.2040030

KEYWORDS: Sensors, Radiometry, Prototyping, Microbolometers, Temperature metrology, Domes, Mars, Infrared radiation, Data acquisition, Solar radiation

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Proceedings Article | 7 March 2014 Paper

Heterogeneous MEMS device assembly and integration

Patrice Topart, Francis Picard, Samir Ilias, Christine Alain, Claude Chevalier, Bruno Fisette, Jacques Paultre, Francis Généreux, Mathieu Legros, Jean-François Lepage, Christian Laverdière, Linh Ngo Phong, Jean-Sol Caron, Yan Desroches

Proceedings Volume 8975, 89750E (2014) https://doi.org/10.1117/12.2041576

KEYWORDS: Mirrors, Bolometers, Electrodes, Microelectromechanical systems, Semiconducting wafers, Sensors, Dysprosium, Assembly equipment, Staring arrays, Nickel

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Proceedings Article | 9 March 2013 Paper

Spaceborne linear arrays of 512x3 microbolometers

Linh Ngo Phong, Ovidiu Pancrati, Linda Marchese, François Châteauneuf

Proceedings Volume 8614, 86140N (2013) https://doi.org/10.1117/12.2004641

KEYWORDS: Microbolometers, Calibration, Mid-IR, Cameras, Sensors, Long wavelength infrared, Infrared radiation, Electronic filtering, Bandpass filters, Space operations

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Proceedings Article | 16 February 2012 Paper

Net flux sensors for the measurement of Mars surface radiation budget

Linh Ngo Phong, Anas Alazzam, Michael Daly, Christian Proulx, Francois Châteauneuf

Proceedings Volume 8252, 82520A (2012) https://doi.org/10.1117/12.909167

KEYWORDS: Sensors, Microbolometers, Domes, Gold, Mars, Sensor networks, Environmental sensing, Coating, Bolometers, Radiometry

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Proceedings Article | 15 February 2012 Paper

Performance prediction and characterization of highly insulated microbolometers for space applications

Zhiqiang Xu, Linh Ngo Phong, Timothy Pope

Proceedings Volume 8250, 82500K (2012) https://doi.org/10.1117/12.909573

KEYWORDS: Microbolometers, Bolometers, Vanadium, Modulation, Sensors, Silicon, Carbon dioxide lasers, Microfabrication, Helium neon lasers, Mirrors

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SPIE Journal Paper | 1 November 2010

Design, manufacturing, and qualification of an uncooled microbolometer focal plane array-based radiometric package for space applications

Sonia García-Blanco, Patrice Côté, Melanie Leclerc, Nathalie Blanchard, Yan Desroches, Jean-Sol Caron, Linh Ngo Phong, François Châteauneuf, Timothy Pope

JM3, Vol. 9, Issue 04, 041105, (November 2010) https://doi.org/10.1117/12.10.1117/1.3492413

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Proceedings Article | 2 September 2009 Paper

Performances of the SAC-D NIRST flight model radiometer

Mélanie Leclerc, Linda Marchese, Patrice Côté, François Châteauneuf, Claude Chevalier, Hugo Marraco, Linh Ngo Phong

Proceedings Volume 7453, 745308 (2009) https://doi.org/10.1117/12.828044

KEYWORDS: Cameras, Mid-IR, Microbolometers, Temperature metrology, Sensors, Staring arrays, Long wavelength infrared, Manufacturing, Finite element methods, Indium oxide

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Proceedings Article | 7 May 2009 Paper

Space qualification of a 512x3 pixel uncooled microbolometer FPA

Timothy Pope, Fabien Dupont, Sonia Garcia Blanco, Fraser Williamson, Claude Chevalier, Linda Marchese, Francois Chateauneuf, Hubert Jerominek, Ngo-Phong Linh, Robert Bouchard

Proceedings Volume 7298, 729826 (2009) https://doi.org/10.1117/12.819922

KEYWORDS: Staring arrays, Sensors, Temperature metrology, Long wavelength infrared, Microbolometers, Cameras, Mid-IR, Radio optics, Stray light, Black bodies

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Proceedings Article | 24 February 2009 Paper

Nanosatellite distributed far infrared radiometers

L. Ngo Phong, F. Châteauneuf

Proceedings Volume 7208, 72080L (2009) https://doi.org/10.1117/12.814248

KEYWORDS: Radiometry, Sensors, Far infrared, Microbolometers, Space operations, Radio optics, Satellites, Data acquisition, Active sensors, Electronics

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Proceedings Article | 24 February 2009 Paper

Advanced microbolometer detectors for a next-generation uncooled FPA for space-based thermal remote sensing

Fraser Williamson, Linda Marchese, Georges Baldenberger, François Châteauneuf, Francis Provencal, Jean-Sol Caron, Fabien Dupont, Jocelyne Osouf, Patrick Couture, Linh Ngo Phong, Tim Pope

Proceedings Volume 7208, 72080J (2009) https://doi.org/10.1117/12.810026

KEYWORDS: Sensors, Microbolometers, Staring arrays, Long wavelength infrared, Clouds, Readout integrated circuits, Sensor performance, Thermal remote sensing, Detector development, Mid-IR

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Proceedings Article | 10 February 2009 Paper

Radiometric packaging of uncooled microbolometer FPA arrays for space applications

S. García-Blanco, P. Cote, M. Leclerc, N. Blanchard, Y. Desroches, J.-S. Caron, L. Ngo Phong, F. Chateauneuf, T. Pope

Proceedings Volume 7206, 720604 (2009) https://doi.org/10.1117/12.810025

KEYWORDS: Sensors, Copper, Temperature metrology, Aluminum, Stray light, Staring arrays, Indium oxide, Microbolometers, Radiation effects, Long wavelength infrared

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INO has extensive experience in the design and fabrication of focal plane arrays (FPAs) of uncooled microbolometers. In particular, the FPA of 512×3 microbolometers, developed in collaboration with the Canadian Space Agency (CSA), has been selected for use in the NIRST (New Infrared Sensor Technology) radiometer of the SAC-D Aquarius mission. The FPA has been designed for pushbroom scanning of the Earth to provide radiometric data in the mid- and long-wave infrared for the monitoring of fires as well as thermal mapping of ocean temperature. Uncooled microbolometer detectors are suited for space applications due to their low power consumption while still exhibiting adequate performance. Furthermore, the spectral range of their response could be tuned from the mid- to the far-infrared to meet different mission requirements. In order to ensure that the detector receives only the thermal contribution from the desired target and to minimize radiometric error due to variation of the temperature of the surrounding during the measurements, a radiometric package is required. In a radiometric package the detector environment is thermally stabilized by means of a temperature controlled radiation shield. The radiation shield should also be designed to prevent stray radiation from reaching the detector. Under the Space Technology Development Program of the CSA, INO has designed, assembled and tested a radiometric package in order to characterize its performance and compatibility with the space environment. The operating spectral band is defined by the spectral characteristics of a bandpass filter placed in front of the FPA. For typical space missions, the package must pass standard environmental tests without degradation of its performance (thermal cycling from -55 to +85 °C according to MIL-STD-810, random acceleration up to 14 G RMS from 20-2000 Hz and shock up to 75 G). In order to ensure reliability in those conditions while maintaining optimum performance, an adequate selection of materials is necessary. In this paper, INO's radiometric packaging technology for uncooled microbolometer FPA's will be presented. The selection of materials will be discussed and the final choices presented based on thermal simulations and experimental data. The effects of different design parameters on the performance, such as material, shape and thickness of radiation shield and choice of adhesive have been studied. An instantaneous noise equivalent temperature difference (NETD) of ~ 20 mK was obtained under the measurement conditions (broadband LWIR, 140 ms integration time, f/1 optics, characterization in flood exposure). The design of the package reduced the contribution of environmental temperature variations on the offset of the sensor. The equivalent response of the package varied less than 0.08 °C per degree of variation of the temperature of the package. The package also showed low sensitivity to stray radiation as a result of the effectiveness of the radiation shield design. The device successfully passed the prescribed environmental tests without degradation of performance.

Proceedings Article | 26 September 2007 Paper

Design of the SAC-D/NIRST camera module

Jonny Gauvin, François Châteauneuf, Linda Marchese, Patrice Coté, Mélanie Leclerc, Claude Chevalier, Hugo Marraco, Linh Phong

Proceedings Volume 6678, 667814 (2007) https://doi.org/10.1117/12.734649

KEYWORDS: Cameras, Mid-IR, Electronics, Staring arrays, Temperature metrology, Sensors, Microbolometers, Indium oxide, Infrared sensors, Infrared radiation

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Proceedings Article | 24 May 2006 Paper

NIRST: a satellite-based IR instrument for fire and sea surface temperature measurement

Hugo Marraco, Linh Ngo Phong

Proceedings Volume 6213, 62130J (2006) https://doi.org/10.1117/12.666925

KEYWORDS: Microbolometers, Satellites, Cameras, Long wavelength infrared, Mid-IR, Sensors, Reflection, Temperature metrology, Readout integrated circuits, Detection and tracking algorithms

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Proceedings Article | 17 May 2006 Paper

Linear microbolometer arrays for space and terrestrial imaging

Timothy Pope, Alain Bergeron, Pascal Bourqui, Christine Alain, Fraser Williamson, Hubert Jerominek, Carol Grenier, Bruno Tremblay, Felix Cayer, Sylvain Garant, Linh Ngo Phong

Proceedings Volume 6206, 62061P (2006) https://doi.org/10.1117/12.667204

KEYWORDS: Sensors, Microbolometers, Detector arrays, Satellites, Electronics, Imaging systems, Staring arrays, Inspection, Infrared radiation, Readout integrated circuits

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Proceedings Article | 10 October 2001 Paper

Nonimaging applications for microbolometer arrays

Francis Picard, Hubert Jerominek, Timothy Pope, Rose Zhang, Linh Ngo, Bruno Tremblay, Nick Tasker, Carol Grenier, Ghislain Bilodeau, Felix Cayer, Mario Lehoux, Christine Alain, Carl Larouche, Simon Savard

Proceedings Volume 4369, (2001) https://doi.org/10.1117/12.445296

KEYWORDS: Bolometers, Microbolometers, Sensors, Temperature metrology, Cameras, Black bodies, Beam analyzers, Laser damage threshold, Infrared lasers, Readout integrated circuits

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Proceedings Article | 7 May 1999 Paper

Resistive YBaCuO microbolometers for infrared imaging applications

Linh Ngo, S. Qiu, Bruno Tremblay

Proceedings Volume 3740, (1999) https://doi.org/10.1117/12.347719

KEYWORDS: Bolometers, Semiconducting wafers, Bridges, Silicon, Gold, Infrared imaging, Molecular bridges, Resistance, Thin films, Bulk micromachining

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Proceedings Article | 26 October 1998 Paper

128x128 pixel uncooled bolometric FPA for IR detection and imaging

Hubert Jerominek, Timothy Pope, Christine Alain, Rose Zhang, Mario Lehoux, Francis Picard, R. Wayne Fuchs, Carol Grenier, Yves Rouleau, Felix Cayer, Simon Savard, Ghislain Bilodeau, Jean-Francois Couillard, Carl Larouche, Linh Ngo

Proceedings Volume 3436, (1998) https://doi.org/10.1117/12.328058

KEYWORDS: Staring arrays, Sensors, Cameras, Infrared cameras, Electronics, Readout integrated circuits, Indium oxide, Video, Infrared detection, Infrared bolometers

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Proceedings Article | 26 October 1998 Paper

Low-temperature thermoelectric coolers for infrared detectors

Linh Phong, I. Shih

Proceedings Volume 3436, (1998) https://doi.org/10.1117/12.328029

KEYWORDS: Thermoelectric materials, Temperature metrology, Computer simulations, Performance modeling, Infrared detectors, Heat treatments, Chemical elements, Resistance, Data modeling, Mathematical modeling

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Proceedings Article | 13 August 1997 Paper

64 x 64, 128 x 128, 240 x 320 pixel uncooled IR bolometric detector arrays

Hubert Jerominek, Timothy Pope, Martin Renaud, Nicholas Swart, Francis Picard, Mario Lehoux, Simon Savard, Ghislain Bilodeau, Danick Audet, Linh Phong, Chu Qiu

Proceedings Volume 3061, (1997) https://doi.org/10.1117/12.280342

KEYWORDS: Sensors, Detector arrays, Metals, Readout integrated circuits, Infrared bolometers, Infrared detectors, Thin films, Vanadium, Silicon, Resistance

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Proceedings Article | 13 August 1997 Paper

Optically coated dual sensors for wavelength detection

Linh Phong, Ishiang Shih

Proceedings Volume 3061, (1997) https://doi.org/10.1117/12.280332

KEYWORDS: Sensors, Attenuators, Optical filters, Linear filtering, Germanium, Superconductors, Semiconductors, Spectral resolution, Absorption, Multiplexing

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Proceedings Article | 13 August 1997 Paper

MgO micromachining for superconductor focal plane arrays

Christine Alain, Linh Phong, Ishiang Shih

Proceedings Volume 3061, (1997) https://doi.org/10.1117/12.280317

KEYWORDS: Superconductors, Micromachining, Staring arrays, Wet etching, Gold, Silver, Infrared imaging, Thermography, Infrared radiation, Millimeter wave imaging

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Proceedings Article | 17 October 1994 Paper

Infrared reflectance and responsivity of PbBiSrCaCuO films

Linh Ngo, Ishiang Shih, Philips Laou

Proceedings Volume 2269, (1994) https://doi.org/10.1117/12.188630

KEYWORDS: Reflectivity, Transmittance, Infrared radiation, Temperature metrology, Sensors, Signal detection, Composites, Mirrors, Infrared photography, Infrared technology

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Showing 5 of 29 publications

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