Dr. Grégory Gadret Profile

Dr. Grégory Gadret

at Lab Interdisciplinaire Carnot de Bourgogne

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Author

Publications (20)

Proceedings Article | 25 May 2022 Presentation

2-18 μm mid-infrared supercontinuum generation in a step-index chalcogenide fiber

Arnaud Lemière, Rémi Bizot, Frédéric Désévédavy, Grégory Gadret, Jean-Charles Jules, Pierre Mathey, Bertrand Kibler, Frédéric Smektala

Proceedings Volume PC12140, PC1214003 (2022) https://doi.org/10.1117/12.2621019

KEYWORDS: Mid-IR, Chalcogenides, Supercontinuum generation, Glasses, Step index fibers, Absorption, Waveguides, Ultrafast phenomena, Transparency, Spectroscopy

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Proceedings Article | 23 May 2018 Presentation

Mid-IR supercontinuum between 1 and 5 µm in step index tellurite fibres for greenhouse or pollutant gases detection (Conference Presentation)

Arnaud Lemière, Paul Froidevaux, Bertrand Kibler, Frédéric Désévédavy, Jean-Charles Jules, Grégory Gadret, Pierre Mathey, Frédéric Smektala

Proceedings Volume 10683, 1068328 (2018) https://doi.org/10.1117/12.2305936

KEYWORDS: Gases, Mid-IR, Pollution detection, Supercontinuum generation, Spectroscopy, Glasses, Refractive index, Supercontinuum sources, Field spectroscopy, Silica

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Development of broadband supercontinuum sources has been studied since decades for its high application potential in various fields like spectroscopy, medical science and others. First experiments were made with silica but the results shown the need to find new materials for supercontinuum generation in the IR wavelength range. Two types of materials have been found interesting for supercontinuum generation: chalcogenide and tellurite glasses. These materials have a high non-linear refractive index and a good transmission in infrared which provides a high potential for applications. Bulks tellurite glasses transmit until 5µm while bulks chalcogenide glasses transmit until 12-20µm depending on their composition. We report here the synthesis of low-OH step-index tellurite fibers and their linear and non-linear characterization. The synthesis is firstly realized by build-in-casting in a glovebox which allows to get a large-core preform(∅clad/∅core  2) and a large core corresponding fiber(∅core  60µm). Then, the rod-in-tube technique allows, from the jacketing of the stretched initial preform, to get a small-core preform and subsequently a small core fiber (∅core  3.5µm). The minimum of losses of the large-core fiber is below 1dB/m, the IR transmission wavelength exceeds 4 µm on several meters of fibers and reaches more than 5 µm on small samples (several centimeters long). We have developed core-clad composition with a large refractive index difference (∆n=0.132) which provides a high confinement in our step-index fibers. We discuss the supercontinuum generation in these fibers exploiting numerical simulations based on the generalized nonlinear Schrödinger equation and then we present the supercontinuum experimental results obtained between 1 and 5µm. Most of pollutant and greenhouse gases emitted by human activity, including methane, carbon dioxide and nitrous oxide, absorbs in the mid-IR. The spectroscopic experiments realized on the gases through supercontinuum generation between 1 and 5 µm are presented.

Proceedings Article | 16 February 2017 Paper

Nonlinear glasses-based microstructured or step-index optical fibers: mid-IR supercontinuum generation and IR spectroscopy applications

Frédéric Smektala, Bertrand Kibler, Clément Strutynski, Jérémy Picot-Clémente, Arnaud Lemière, Paul Froidevaux, Frédéric Désévédavy, Grégory Gadret, Jean-Charles Jules

Proceedings Volume 10100, 1010012 (2017) https://doi.org/10.1117/12.2257044

KEYWORDS: Optical fibers, Supercontinuum generation, Glasses, Mid-IR, Infrared spectroscopy, Infrared radiation, Spectroscopy, Micro optical fluidics, Step index fibers, Methane, Oxides, Zinc oxide, Nonlinear optical glasses

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Proceedings Article | 7 May 2015 Paper

Spectral broadening in low OH content and dispersion-managed tellurite fibres for compact mid IR sources

C. Strutynski, J. Picot-Clémente, F. Amrani, Oussama Mouawad, F. Désévédavy, G. Gadret, J. C. Jules, B. Kibler, D. Deng, T. Cheng, Y. Ohishi, F. Smektala

Proceedings Volume 9507, 950704 (2015) https://doi.org/10.1117/12.2182166

KEYWORDS: Glasses, Micro optical fluidics, Dispersion, Waveguides, Mid-IR, Supercontinuum generation, Zinc oxide, Structured optical fibers, Manufacturing, Optics manufacturing

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Proceedings Article | 10 May 2011 Paper

Nonlinear effects generation in suspended core chalcogenide fibre

M. El-Amraoui, M. Duhant, F. Desevedavy, W. Renard, G. Canat, G. Gadret, J.-C. Jules, J. Fatome, B. Kibler, G. Renversez, J. Troles, L. Brilland, Y. Messaddeq, F. Smektala

Proceedings Volume 8073, 80732H (2011) https://doi.org/10.1117/12.886720

KEYWORDS: Optical fibers, Glasses, Raman spectroscopy, Chalcogenides, Dispersion, Micro optical fluidics, Signal attenuation, Waveguides, Raman scattering, Chalcogenide glass

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Proceedings Article | 10 May 2011 Paper

Supercontinuum generation in suspended core microstructured tellurite optical fibers

iI. Savelii, J. Jules, G. Gadret, B. Kibler, J. Fatome, M. El-Amraoui, F. Désévédavy, J. Dudley, J. Troles, L. Brilland, G. Renversez, F. Smektala

Proceedings Volume 8073, 80732G (2011) https://doi.org/10.1117/12.886414

KEYWORDS: Optical fibers, Glasses, Micro optical fluidics, Supercontinuum generation, Tellurium, Dispersion, Crystals, Infrared radiation, Femtosecond phenomena, Signal attenuation

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Proceedings Article | 22 July 2010 Paper

The NULLTIMATE test bench: achromatic phase shifters for nulling interferometry

Peter Schuller, Olivier Demangeon, Alain Léger, Marc Barillot, Bruno Chazelas, Michel Decaudin, Marc Derrien, Philippe Duret, Pavel Gabor, Grégory Gadret, Jean Gay, Alain Labèque, Ralf Launhardt, Jacques Mangin, Yves Rabbia, Zoran Sodnik

Proceedings Volume 7734, 77342E (2010) https://doi.org/10.1117/12.857136

KEYWORDS: Phase shifts, Mirrors, Interferometers, Nulling interferometry, Germanium, Polarization, Refractive index, Thermography, K band, Optical benches

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Proceedings Article | 14 May 2010 Paper

Experimental observation of infrared spectral enlargement in As2S3 suspended core microstructured fiber

M. El-Amraoui, J. Fatome, J. Jules, B. Kibler, G. Gadret, I. Skripatchev, Y. Messadeq, G. Renversez, M. Szpulak, J. Troles, L. Brilland, F. Smektala

Proceedings Volume 7714, 771409 (2010) https://doi.org/10.1117/12.853698

KEYWORDS: Micro optical fluidics, Chalcogenides, Glasses, Infrared radiation, Dispersion, Chalcogenide glass, Structured optical fibers, Silica, Solids, Arsenic

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Proceedings Article | 7 February 2009 Paper

Recent progress on the realization of chalcogenides photonic crystal fibers

L. Brilland, P. Houizot, J. Troles, F. Désévédavy, Q. Coulombier, J. Fatome, C. Fortier, F. Smektala, K. Messadd, B. Kibler, S. Pitois, G. Gadret, C. Finot, T. Nguyen, T. Chartier, M. Thual, G. Renversez, N. Traynor, J. L. Adam

Proceedings Volume 7212, 72120F (2009) https://doi.org/10.1117/12.815907

KEYWORDS: Glasses, Chalcogenides, Chalcogenide glass, Raman spectroscopy, Raman scattering, Capillaries, Signal attenuation, Photonic crystal fibers, Silica, Interfaces

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Proceedings Article | 25 September 2008 Paper

Dispersion and temperature dependence of thermo-optic coefficients of optical materials over their whole transparency range: vectorial formalism and application to KTiOPO4

Jacques Mangin, Grégory Gadret, Gabriel Mennerat

Proceedings Volume 7102, 71020W (2008) https://doi.org/10.1117/12.804722

KEYWORDS: Temperature metrology, Thermal optics, Refractive index, Crystals, Interferometry, Ferroelectric materials, Transparency, Thermography, Beam splitters, Phase matching

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Proceedings Article | 20 October 2004 Paper

Opto-thermo-mechanical numerical simulations of three different concepts of infrared achromatic phase shifters

Bruno Chazelas, Claude Valette, Thierry Lepine, Marc Barillot, Frank Brachet, Sebatien Dervaux, Francois Fressin, Jean Gay, Gregory Gadret, Alain Labeque, Alain Leger, Ralph Launhardt, Jacques Mangin, Dimitri Mawet, Marc Ollivier, Yves Rabbia, Elke Schmidt

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551587

KEYWORDS: Monte Carlo methods, Mirrors, Wavefronts, Tolerancing, Nulling interferometry, Polarization, Numerical simulations, Phase shifts, Optical components, Ray tracing

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Proceedings Article | 26 February 2004 Paper

Simultaneous determination of thermo- and electro-optic coefficients by Fabry-Pérot thermal scanning interferometry

Jacques Mangin, Sandrine Fossier, Pierre Strimer, Gregory Gadret

Proceedings Volume 5252, (2004) https://doi.org/10.1117/12.513284

KEYWORDS: Electro optics, Crystals, Interferometry, Thermal optics, Modulation, Amplitude modulation, Refractive index, Temperature metrology, Interferometers, Phase shift keying

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Proceedings Article | 13 June 2002 Paper

Real-time monitoring of the all-optical poling in polymers

Aleksandra Apostoluk, Bouchta Sahraoui, Gregory Gadret, Celine Fiorini-Debuisschert, Paul Raimond, Kwang-Sup Lee, Chantal Andraud, Gilles Lemercier, Magali Alexandre, Jean-Christophe Mulatier, Jean-Michel Nunzi

Proceedings Volume 4642, (2002) https://doi.org/10.1117/12.470453

KEYWORDS: Molecules, Polymers, Absorption, Refractive index, Prisms, Second-harmonic generation, Chromophores, Thin films, Absorbance, Glasses

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Proceedings Article | 28 March 2002 Paper

Novel real-time monitoring technique of the all-optical poling process

Aleksandra Apostoluk, David Chapron, Bouchta Sahraoui, Gregory Gadret, Celine Fiorini-Debuisschert, Paul Raimond, Jean-Michel Nunzi

Proceedings Volume 4628, (2002) https://doi.org/10.1117/12.460814

KEYWORDS: Molecules, Prisms, Signal generators, Phase modulation, Second-harmonic generation, Polymers, Refractive index, Optical filters, Glasses, Modulation

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Proceedings Article | 15 May 1994 Paper

Determination of the dispersion of linear and quadratic electro-optic coefficients in thin films by electric field-induced modulated ellipsometry

Pierre-Alain Chollet, Gregory Gadret, Francois Kajzar, Paul Raimond

Proceedings Volume 2143, (1994) https://doi.org/10.1117/12.173834

KEYWORDS: Electro optics, Absorption, Thin films, Modulation, Electro optical modeling, Reflection, Refractive index, Electrodes, Polymers, Polymer thin films

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Proceedings Article | 16 December 1993 Paper

Nonlinear optical response in side-chain liquid crystal polymers

Dominique Gonin, Gregory Gadret, Claudine Noel, Francois Kajzar

Proceedings Volume 2025, (1993) https://doi.org/10.1117/12.165249

KEYWORDS: Polymers, Liquid crystals, Crystals, Liquids, Absorption, Nonlinear optics, Second-harmonic generation, Molecules, Thin films, Glasses

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Proceedings Article | 25 February 1993 Paper

Electro-optic organic thin films for applications in waveguided devices

Pierre-Alain Chollet, Gregory Gadret, Francois Kajzar, Paul Raimond, M. Zagorska

Proceedings Volume 1775, (1993) https://doi.org/10.1117/12.139229

KEYWORDS: Chromophores, Electro optics, Polymers, Refractive index, Absorption, Thin films, Organic materials, Anisotropy, Waveguides, Thin film devices

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Proceedings Article | 25 February 1993 Paper

Ellipsometry techniques in thin-film electro-optic coefficients measurements

Yves Levy, Pierre-Alain Chollet, Gregory Gadret, Francois Kajzar

Proceedings Volume 1775, (1993) https://doi.org/10.1117/12.139206

KEYWORDS: Electro optics, Polymer thin films, Polymers, Modulation, Absorption, Electrodes, Refractive index, Organic materials, Kerr effect, Thin films

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Proceedings Article | 1 December 1991 Paper

Nonlinear optical properties of poled polymers

Gregory Gadret, Francois Kajzar, Paul Raimond

Proceedings Volume 1560, (1991) https://doi.org/10.1117/12.50720

KEYWORDS: Thin films, Molecules, Polymers, Polymer thin films, Electro optics, Absorption, Second-harmonic generation, Organic materials, Harmonic generation, Polymethylmethacrylate

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Proceedings Article | 1 December 1991 Paper

Nonlinear properties of poled-polymer films: SHG and electro-optic measurements

D. Morichere, Michel Dumont, Yves Levy, Gregory Gadret, Francois Kajzar

Proceedings Volume 1560, (1991) https://doi.org/10.1117/12.50719

KEYWORDS: Electro optics, Reflectivity, Modulation, Second-harmonic generation, Polymers, Thin films, Organic materials, Polymethylmethacrylate, Electro optical modeling, Harmonic generation

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Showing 5 of 20 publications

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