Prof. Mehdi Alouini Profile

Prof. Mehdi Alouini

Professor at Univ de Rennes 1

Publications (26)

Proceedings Article | 20 April 2020 Presentation + Paper

Near-infrared active and selective polarization imaging by orthogonality-breaking: calibration of the acquisition chain

Jonathan Staes, François Parnet, Julien Fade, Noé Ortega-Quijano, Mehdi Alouini

Proceedings Volume 11351, 113511E (2020) https://doi.org/10.1117/12.2555880

KEYWORDS: Polarization, Polarimetry, Calibration, Demodulation, Signal detection, Modulation, Anisotropy, Imaging systems, Birefringence, Polarizers

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Proceedings Article | 1 April 2020 Presentation

Full-field all-optical snapshot technique for QUADrature (FAST-QUAD) demodulation of optical signals at radio-frequencies: principle and experimental proof-of-concept (Conference Presentation)

Swapnesh Panigrahi, Julien Fade, Romain Agaisse, Hema Ramachandran, Mehdi Alouini

Proceedings Volume 11351, 1135118 (2020) https://doi.org/10.1117/12.2555009

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Since long, optical intensity modulation/demodulation techniques have encountered numerous applications in telemetry, free-space communications or optical characterization of scattering media. Upgrading those techniques to a full-field, real-time imaging modality can allow massive multiplexing, an essential asset not only for 3D imaging or optical communications, but also for imaging in turbid media (medical diagnosis, underwater vision, imaging in colloids, or navigational aid for safe transports). In this context, we have recently proposed a new concept of Full-field All-optical Snapshot Technique for QUADrature demodulation imaging (FAST-QUAD), whose capacity in real-time image demodulation have been demonstrated up to frequencies of 500 kHz, without requiring any synchronization between the receiver and the intensity-modulated source(s) in the imaged scene. This technique relies on an all-optical architecture, at the heart of which is an electro-optical crystal and appropriate polarization optics components, making it possible to spatially multiplex four transmission « gates » in quadrature to each other (0°, 90°, 180°, 270°), addressing four sub-images detected on the same single standard sensor (CCD/CMOS). This setup behaves as a quadrature lock-in detection circuit, well-known in the electronics field, but in the optical domain and in a massively spatially multiplexed way, using the acquisition time of the camera as a low-pass integrator. This optical module can therefore be inserted in front of any camera, and allows the number of electronics components to be minimized. This property provides FAST-QUAD with a major asset, as its operating frequency is fully and continuously tunable in the RF range, which allowed us to establish an experimental proof-of-concept between 0 Hz (DC) and 500 kHz on the first prototype built in the laboratory. We will detail the instrumental conception of this prototype as well as the calibration/processing pipeline developed. Experimental validation results and examples of application of the FAST-QUAD approach will also be presented.

Proceedings Article | 9 March 2020 Presentation

High-power InAs quantum dot VECSEL with fundamental mode emission at 1.5 µm (Conference Presentation)

Kostiantyn Nechay, Alexander Mereuta, Cyril Paranthoën, Gaelle Brevalle, Christophe Levallois, Mehdi Alouini, Nicolas Chevalier, Grigore Suruceanu, Andrei Caliman, Eli Kapon, Mircea Guina

Proceedings Volume 11263, 112630J (2020) https://doi.org/10.1117/12.2548436

KEYWORDS: Quantum dots, Indium arsenide, Quantum wells, Laser optics, Heterojunctions, Semiconductor lasers, Solid state lasers, Semiconductors, Polarization, Frequency conversion

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SPIE Journal Paper | 9 February 2019

Characterization of a polarimetric infrared imager based on the orthogonality breaking technique

François Parnet, Julien Fade, Muriel Roche, Goulc’hen Loas, Noé Ortega-Quijano, Ludovic Frein, Mehdi Alouini

OE, Vol. 58, Issue 08, 082407, (February 2019) https://doi.org/10.1117/12.10.1117/1.OE.58.8.082407

KEYWORDS: Imaging systems, Polarimetry, Image segmentation, Polarizers, Signal detection, Infrared imaging, Infrared radiation, Temporal coherence, Polarization, Near infrared

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Proceedings Article | 18 September 2018 Paper

Liquid crystal based tunable PIN-photodiodes for detection around 1.55-µm

C. Levallois, C. Paranthoen, B. Boisnard, T. Camps, B. Sadani, S. Pes, S. Bouchoule, L. Dupont, J.-B. Doucet, M. Alouini, V. Bardinal

Proceedings Volume 10729, 107290H (2018) https://doi.org/10.1117/12.2322138

KEYWORDS: Liquid crystals, Tunable filters, Photodiodes, Optical microcavities, Tunable lasers, Polarization, Wavelength division multiplexing, Spectrometer engineering

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Proceedings Article | 17 May 2018 Presentation + Paper

Dual-polarization DFB fiber lasers as optical phase-locked microwave sources in the 1-10 GHz range

M. Guionie, L. Frein, F. Bondu, A. Carré, G. Loas, E. Pinsard, B. Cadier, M. Alouini, M. Romanelli, M. Vallet, M. Brunel

Proceedings Volume 10683, 106832G (2018) https://doi.org/10.1117/12.2306049

KEYWORDS: Fiber lasers, Oscillators, Polarization, Microwave radiation, Erbium, Diodes, Laser stabilization, Fiber Bragg gratings, Birefringence, Temperature metrology

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Proceedings Article | 26 January 2018 Open Access

Bases and experimental validation of a novel VSPIN model: towards functional spin-controlled VCSELs

M. Alouini, J. Frougier, A. Joly, G. Baili, D. Dolfi, J. M. George

Proceedings Volume 10540, 105401S (2018) https://doi.org/10.1117/12.2289694

KEYWORDS: Dichroic materials, Switching, Switches, Mirrors, Semiconductor lasers, Spintronics, Spin polarization

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Proceedings Article | 19 September 2017 Presentation + Paper

Active infrared polarimetric imaging demonstrator by orthogonality breaking sensing

François Parnet, Julien Fade, Noé Ortega-Quijano, Goulc'hen Loas, Ludovic Frein, Mehdi Alouini

Proceedings Volume 10407, 104070S (2017) https://doi.org/10.1117/12.2273309

KEYWORDS: Polarimetry, Polarization, Infrared imaging, Infrared radiation, Target detection, Infrared detectors, Infrared sensors, Imaging systems, Active remote sensing, Manufacturing

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Proceedings Article | 13 February 2016 Paper

Theoretical and experimental investigation of optically spin-injected VECSEL

Alexandre Joly, Julien Frougier, Ghaya Baili, Mehdi Alouini, Jean-Marie George, Isabelle Sagnes, Daniel Dolfi

Proceedings Volume 9755, 97551E (2016) https://doi.org/10.1117/12.2218148

KEYWORDS: Ferromagnetics, Spin polarization, Vertical external cavity surface emitting lasers, Quantum wells, Reflectivity, Optical pumping, Polarizers

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Proceedings Article | 15 October 2015 Paper

Noise correlation-based adaptive polarimetric image representation for contrast enhancement of a polarized beacon in fog

Swapnesh Panigrahi, Julien Fade, Mehdi Alouini

Proceedings Volume 9643, 96430C (2015) https://doi.org/10.1117/12.2195216

KEYWORDS: Polarimetry, Polarization, Cameras, Image processing, Fiber optic gyroscopes, Image enhancement, Image contrast enhancement, Visibility, Image filtering, Imaging systems

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Proceedings Article | 1 September 2015 Paper

Polarizer-free degree of polarization computational imaging from a single speckle image

J. Fade, M. Roche, M. Alouini

Proceedings Volume 9613, 961302 (2015) https://doi.org/10.1117/12.2188599

KEYWORDS: Polarization, Speckle, Computational imaging, Statistical analysis, Remote sensing, Current controlled current source, Charge-coupled devices, Information operations, Image acquisition, Reflectivity

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Proceedings Article | 1 September 2015 Paper

Single shot diattenuation imaging by circular polarization orthogonality breaking

Noé Ortega-Quijano, Julien Fade, Emmanuel Schaub, François Parnet, Mehdi Alouini

Proceedings Volume 9613, 961303 (2015) https://doi.org/10.1117/12.2188569

KEYWORDS: Polarimetry, Dichroic materials, Polarization, Polarizers, Biomedical optics, Statistical analysis, Signal detection, Mirrors, Bragg cells, Wave plates

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Proceedings Article | 1 September 2015 Paper

Optimal contrast enhancement in long distance snapshot polarimetric imaging through fog

Swapnesh Panigrahi, Julien Fade, Mehdi Alouini

Proceedings Volume 9613, 96130V (2015) https://doi.org/10.1117/12.2188590

KEYWORDS: Polarimetry, Image processing, Cameras, Fiber optic gyroscopes, Polarization, Solids, Visibility through fog, Visibility, Sensors, Enhanced vision

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Proceedings Article | 3 March 2014 Paper

Experimental and theoretical study of noise in a dual-frequency VECSEL

Syamsundar De, Abdelkrim El Amili, Grégoire Pillet, Ghaya Baili, Fabienne Goldfarb, Mehdi Alouini, Isabelle Sagnes, Fabien Bretenaker

Proceedings Volume 8966, 89660M (2014) https://doi.org/10.1117/12.2038934

KEYWORDS: Modes of laser operation, Semiconductors, Phase measurement, Refractive index, Crystals, Oscillators, Solids, Polarization, Semiconductor lasers, Mirrors

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Proceedings Article | 15 October 2012 Paper

Narrow linewidth tunable THz signal radiated by 1.55µm photomixing

Antoine Rolland, Guillaume Ducournau, Goulc'hen Loas, Alexandre Beck, Fabio Pavanello, Emilien Peytavit, Tahsin Akalin, Mohamed Zaknoune, Jean-François Lampin, Marc Brunel, François Bondu, Marc Vallet, Mehdi Alouini

Proceedings Volume 8496, 84960C (2012) https://doi.org/10.1117/12.929738

KEYWORDS: Terahertz radiation, Signal to noise ratio, Signal detection, Signal attenuation, Photodiodes, Heterodyning, Tunable lasers, Physics, Spectroscopy, Metrology

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Proceedings Article | 15 October 2012 Paper

Optoelectronic phase-locked loop for millimeter-wave and THz beat note stabilization

A. Rolland, G. Loas, L. Frein, M. Vallet, M. Brunel, M. Alouini

Proceedings Volume 8496, 84960H (2012) https://doi.org/10.1117/12.929703

KEYWORDS: Terahertz radiation, Optoelectronics, Modulators, Phased array optics, Crystals, Tunable lasers, Radio optics, Microwave radiation, Electro optics, Laser crystals

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Proceedings Article | 24 August 2011 Paper

Optimization of simultaneous oscillation of a two-frequency VECSEL by coupling constant measurement

V. Pal, P. Trofimoff, G. Baili, M. Alouini, I. Sagnes, R. Ghosh, F. Bretenaker

Proceedings Volume 8173, 817315 (2011) https://doi.org/10.1117/12.897790

KEYWORDS: Polarization, Crystals, Modulation, Information operations, Laser crystals, Quantum wells, Vertical external cavity surface emitting lasers, Mirrors, Fabry–Perot interferometers, Spectrum analysis

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Proceedings Article | 24 January 2011 Paper

High finesse external cavity VCSELs: from very low noise lasers to dual frequency lasers

Ghaya Baili, Medhi Alouini, Loic Morvan, Fabien Bretenaker, Isabelle Sagnes, Arnaud Garnache, Daniel Dolfi

Proceedings Volume 7945, 79450A (2011) https://doi.org/10.1117/12.876189

KEYWORDS: Phase shift keying, Modulation, Interference (communication), Control systems, Microwave radiation, Optical filters, Mode locking, Phase measurement, Mirrors, Photodiodes

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Proceedings Article | 12 February 2010 Paper

Nonlinear distortion and spurious-free dynamic range of a tunable delay line based on slow light in SOA

Perrine Berger, Jérôme Bourderionnet, Mehdi Alouini, Fabien Bretenaker, Daniel Dolfi

Proceedings Volume 7612, 76120S (2010) https://doi.org/10.1117/12.840933

KEYWORDS: Modulation, Modulators, Slow light, Radar, Intermodulation, Solids, Phase shift keying, Distortion, Microwave photonics, Harmonic generation

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Proceedings Article | 5 May 2009 Paper

Estimation and detection in degree of polarization images perturbed by detector noise and non uniform illumination

Arnaud Bénière, François Goudail, Mehdi Alouini, Daniel Dolfi

Proceedings Volume 7335, 733510 (2009) https://doi.org/10.1117/12.820050

KEYWORDS: Sensors, Polarization, Sodium, Target detection, Niobium, Protactinium, Lead, Imaging systems, Signal to noise ratio, Reflectivity

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Proceedings Article | 2 May 2009 Paper

Snapshot active polarimetric and multispectral laboratory demonstrator

Arnaud Bénière, Mehdi Alouini, François Goudail, Arnaud Grisard, Jérôme Bourderionnet, Daniel Dolfi, Ivar Baarstad, Trond Loke, Peter Kaspersen, Xavier Normandin, Gérard Berginc

Proceedings Volume 7323, 732310 (2009) https://doi.org/10.1117/12.820052

KEYWORDS: Polarimetry, Imaging systems, Polarization, Optical parametric oscillators, Hyperspectral imaging, Sensors, Mirrors, Polarization analysis, Crystals, Multispectral imaging

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Proceedings Article | 5 October 2006 Paper

Active polarimetric and multispectral laboratory demonstrator: contrast enhancement for target detection

Mehdi Alouini, François Goudail, Arnaud Grisard, Jérôme Bourderionnet, Daniel Dolfi, Ivar Baarstad, Trond Løke, Peter Kaspersen, Xavier Normandin

Proceedings Volume 6396, 63960B (2006) https://doi.org/10.1117/12.690835

KEYWORDS: Imaging systems, Polarimetry, Target detection, Hyperspectral imaging, Multispectral imaging, Polarization, Optical parametric oscillators, Sensors, Electrodes, Target recognition

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Proceedings Article | 8 December 2004 Paper

Continuous-wave THz generation through photomixing using a dual-frequency Yb3+:KGd(WO4)2 laser

Romain Czarny, Medhi Alouini, Christian Larat, Sukhdeep Dhillon, Michel Krakowski, Shailendra Bansropun, Valentin Ortiz, Carlo Sirtori, Bruno Gerard, Daniel Dolfi

Proceedings Volume 5619, (2004) https://doi.org/10.1117/12.581285

KEYWORDS: Terahertz radiation, Semiconductor lasers, Antennas, Modulation, Polarization, Continuous wave operation, Indium gallium arsenide, Wave plates, Photoresistors

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Proceedings Article | 8 December 2004 Paper

Two optronic identification techniques: lidar-radar and multispectral polarimetric imaging

Loic Morvan, Mehdi Alouini, Arnaud Grisard, Eric Lallier, Daniel Dolfi, Xavier Normandin, Anne Bouchardy, Gerard Berginc, G. Granger, Jean Chazelas

Proceedings Volume 5613, (2004) https://doi.org/10.1117/12.581283

KEYWORDS: Polarization, Polarimetry, Multispectral imaging, Modulation, Reflectivity, RGB color model, Scattering, Imaging systems, Radar, Target detection

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Proceedings Article | 15 July 2004 Paper

Multispectral polarimetric imaging with coherent illumination: towards higher image contrast

Mehdi Alouini, Francois Goudail, Philippe Refregier, Arnaud Grisard, Eric Lallier, Daniel Dolfi

Proceedings Volume 5432, (2004) https://doi.org/10.1117/12.543620

KEYWORDS: Polarimetry, Polarization, Multispectral imaging, Target detection, RGB color model, Scattering, Light scattering, Reflectivity, Speckle, Detection and tracking algorithms

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Proceedings Article | 2 March 2001 Paper

One- and two-axis laser cavities for dual-frequency operation and microwave generation

M. Alouini, Fabien Bretenaker, Michel Brunel, D. Chauvat, Olivier Emile, Albert Le Floch, Guy Ropars, M. Vallet

Proceedings Volume 4353, (2001) https://doi.org/10.1117/12.417727

KEYWORDS: Laser resonators, Crystals, Microwave radiation, Terahertz radiation, Oscillators, Semiconductor lasers, Solid state lasers, Modulation, Tunable lasers, Electro optics

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Showing 5 of 26 publications

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