Dr. Michael Tchagaspanian Profile

Dr. Michael Tchagaspanian

Engineer at CEA-LETI

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Publications (13)

Proceedings Article | 15 February 2012 Paper

A low-noise 15-µm pixel-pitch 640x512 hybrid InGaAs image sensor for night vision

Fabrice Guellec, Sébastien Dubois, Eric de Borniol, Pierre Castelein, Sébastien Martin, Romain Guiguet, Michaël Tchagaspanian, Anne Rouvié, Philippe Bois

Proceedings Volume 8298, 82980C (2012) https://doi.org/10.1117/12.912105

KEYWORDS: Cadmium sulfide, Sensors, Indium gallium arsenide, Capacitance, Night vision, Photodiodes, Image sensors, Readout integrated circuits, Amplifiers, Electrons

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Proceedings Article | 28 October 2010 Paper

A 25µm pitch LWIR staring focal plane array with pixel-level 15-bit ADC ROIC achieving 2mK NETD

Sylvette Bisotto, Eric de Borniol, Laurent Mollard, Fabrice Guellec, Arnaud Peizerat, Michaël Tchagaspanian, Pierre Castelein, Patrick Maillart

Proceedings Volume 7834, 78340J (2010) https://doi.org/10.1117/12.865062

KEYWORDS: Signal to noise ratio, Long wavelength infrared, Staring arrays, Prototyping, Readout integrated circuits, Electrons, High dynamic range imaging, Photodiodes, Mercury cadmium telluride, Sensors

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Proceedings Article | 4 May 2010 Paper

HgCdTe-based APD focal plane array for 2D and 3D active imaging: first results on a 320 x 256 with 30 µm pitch demonstrator

Eric de Borniol, Fabrice Guellec, Johan Rothman, André Perez, Jean-Paul Zanatta, Michael Tchagaspanian, Pierre Castelein, Gérard Destéfanis, Jean-Christophe Peyrard, Frédéric Pistone

Proceedings Volume 7660, 76603D (2010) https://doi.org/10.1117/12.850689

KEYWORDS: Staring arrays, Pulsed laser operation, Readout integrated circuits, LIDAR, 3D metrology, Ranging, Nonuniformity corrections, 3D image processing, Photons, Capacitors

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Proceedings Article | 4 May 2010 Paper

A 25µm pitch LWIR focal plane array with pixel-level 15-bit ADC providing high well capacity and targeting 2mK NETD

Fabrice Guellec, Arnaud Peizerat, Michael Tchagaspanian, Eric De Borniol, Sylvette Bisotto, Laurent Mollard, Pierre Castelein, Jean-Paul Zanatta, Patrick Maillart, Michel Zecri, Jean-Christophe Peyrard

Proceedings Volume 7660, 76603T (2010) https://doi.org/10.1117/12.849684

KEYWORDS: Signal to noise ratio, Long wavelength infrared, Prototyping, Staring arrays, Readout integrated circuits, Sensors, Mercury cadmium telluride, Electro optics, Analog electronics, Interference (communication)

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Proceedings Article | 7 May 2009 Paper

Status of p-on-n HgCdTe technologies at DEFIR

N. Baier, L. Mollard, J. Rothman, G. Destéfanis, P. Ballet, G. Bourgeois, J. Zanatta, M. Tchagaspanian, S. Courtas, P. Fougères, C. Pautet, P. Pidancier, L. Rubaldo

Proceedings Volume 7298, 729823 (2009) https://doi.org/10.1117/12.820343

KEYWORDS: Arsenic, Sensors, Photodiodes, Doping, Staring arrays, Indium, Long wavelength infrared, Mid-IR, Dispersion, Temperature metrology

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Proceedings Article | 15 May 2008 Paper

New readout integrated circuit using continuous time fixed pattern noise correction

Bertrand Dupont, G. Chammings, G. Rapellin, C. Mandier, M. Tchagaspanian, Benoit Dupont, A. Peizerat, J. J. Yon

Proceedings Volume 6940, 69402W (2008) https://doi.org/10.1117/12.779279

KEYWORDS: Bolometers, Scattering, Capacitors, Resistance, Sensors, Readout integrated circuits, Infrared radiation, Analog electronics, Infrared bolometers, Staring arrays

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Proceedings Article | 15 May 2008 Paper

HgCdTe FPAs made by arsenic-ion implantation

L. Mollard, G. Destefanis, J. Rothman, N. Baier, S. Bisotto, P. Ballet, J. Chamonal, P. Castelein, J. Zanatta, M. Tchagaspanian, A. Papon, J. Barnes, F. Henry, S. Gout, G. Bourgeois, C. Pautet, P. Fougères

Proceedings Volume 6940, 69400F (2008) https://doi.org/10.1117/12.780582

KEYWORDS: Arsenic, Long wavelength infrared, Doping, Mid-IR, Mercury cadmium telluride, Photodiodes, Annealing, Indium, Mercury, Diffusion

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Proceedings Article | 5 May 2008 Paper

HgCdTe APD- focal plane array development at CEA Leti-Minatec

Johan Rothman, Gwladys Perrais, Eric De Borniol, Pierre Castelein, Nicholas Baier, Fabrice Guellec, Michael Tchagaspanian, Philippe Ballet, Laurent Mollard, Sylvain Gout, André Perez, Maryse Fournier, Jean-Paul Chamonal, Philippe Tribolet, Gerard Destefanis

Proceedings Volume 6940, 69402N (2008) https://doi.org/10.1117/12.780447

KEYWORDS: Avalanche photodetectors, Liquid phase epitaxy, Mercury cadmium telluride, Medium wave, Staring arrays, Readout integrated circuits, 3D image processing, 3D metrology, Stereoscopy, Diffusion

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We report the latest developments of MW HgCdTe electron initiated avalanche photo-diodes (e-APDs) focal plane arrays (FPAs) at CEA-LETI. The MW e-APD FPAs are developed in view of ultra-sensitive high dynamic range passive starring arrays, active 2D/3D and dual-mode passive-active imaging, which is why both the passive imaging performance and the gain characteristics of the APDs are of interest. A passive mode responsivity operability of 99.9% was measured in LPE and MBE e-APDs FPAs associated with an average NETD=12mK, demonstrating that dual mode passive-active imaging can be achieved with LETI e-APDs without degradation in the passive imaging performance. The gain and sensitivity performances were measured in test arrays and using a low voltage technology (3.3V) CTIA test pixel designed for 3D active imaging. The CTIA and test arrays measurements yielded comparable results in terms of bias gain dependence (M=100 at V_b=-7V), low excess noise factor (=1.2) and low equivalent input current (I_{eq_in}<1pA). These results validated the low voltage CTIA approach for integrating the current from a HgCdTe e-APD under high bias. The test array measurements demonstrated a relative dispersion below 2% in both MBE and LPE e- APDs for gains higher than M>100, associated with an operability of 99%. The operability at I_{eq_in}<1pA at M=30 was 95%. A record low value of Ieq_in=1fA was estimated in the MBE e-APDs at M=100, indicating the potential for using the MW e-APDs for very low flux applications. The high potential of the MW e-APDS for active imaging was demonstrated by impulse response measurements which yielded a typical rise time lower than 100ps and diffusion limited fall time of 900ps to 5ns, depending on the pixel pitch. This potential was confirmed by the demonstration of a 2ns time of flight (TOF) resolution in the CTIA e-APD 3D pixel. The combined photon and dark current induced equivalent back ground noise at f/8 with a cold band pass filter at λ=1.55μm was 2 electrons rms for an integration time of 50ns.

Proceedings Article | 5 May 2008 Paper

Advanced pixel design for infrared 3D LADAR imaging

Fabrice Guellec, Michaël Tchagaspanian, Eric de Borniol, Pierre Castelein, André Perez, Johan Rothman

Proceedings Volume 6940, 69402M (2008) https://doi.org/10.1117/12.779284

KEYWORDS: Pulsed laser operation, LIDAR, 3D metrology, Avalanche photodetectors, Readout integrated circuits, Photons, 3D image processing, Ranging, Avalanche photodiodes, Analog electronics

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Proceedings Article | 29 February 2008 Paper

Auto-adaptative LSB technique for in-pixel analog to digital conversion

Arnaud Peizerat, Amélie Martin, Michael Tchagaspanian, Valérie Nguyen

Proceedings Volume 6816, 68160S (2008) https://doi.org/10.1117/12.782525

KEYWORDS: Sensors, Control systems, Analog electronics, Signal to noise ratio, Photodiodes, X-rays, Clocks, Image sensors, Capacitors, CMOS technology

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Proceedings Article | 24 January 2008 Paper

New architecture for TECless operation of uncooled microbolometers developed at LETI

F. Simoens, M. Tchagaspanian, A. Arnaud, P. Imperinetti, G. Chammings, J. Yon, J. Tissot, Gérard Destefanis

Proceedings Volume 6835, 683502 (2008) https://doi.org/10.1117/12.757238

KEYWORDS: Microbolometers, Sensors, Prototyping, Fourier transforms, Infrared materials, Thermography, Imaging systems, Mirrors

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Proceedings Article | 14 May 2007 Paper

New IRCMOS architecture applied to uncooled microbolometers developed at LETI

F. Simoens, M. Tchagaspanian, A. Arnaud, P. Imperinetti, G. Chammings, J. J. Yon, J. L. Tissot

Proceedings Volume 6542, 65421T (2007) https://doi.org/10.1117/12.719310

KEYWORDS: Bolometers, Staring arrays, Mirrors, Microbolometers, Sensors, Thermography, Prototyping, Temperature metrology, Readout integrated circuits, Bridges

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Proceedings Article | 14 May 2007 Paper

Design of ADC in 25 µm pixels pitch dedicated for IRFPA image processing at LETI

M. Tchagaspanian, P. Villard, B. Dupont, G. Chammings, J. L. Martin, C. Pistre, D. Lattard, C. Chantre, A. Arnaud, J. J. Yon, F. Simoens, J. L. Tissot

Proceedings Volume 6542, 65421W (2007) https://doi.org/10.1117/12.719148

KEYWORDS: Microbolometers, Bolometers, Readout integrated circuits, Capacitors, Molybdenum, Transistors, Sensors, Analog electronics, Image processing, Staring arrays

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Showing 5 of 13 publications

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