Guides optiques infrarouges pour la détection du CO2

session affiches A7 " Instrumentation, Caractérisation et Capteurs " [A7.1]National audienceL'équipe Verres et Céramiques développe des fibres optiques originales qui sont à la base de la réalisation de capteur optique opérant dans l'infrarouge. L'intérêt et le potentiel de ces capteurs ont été démontrés dans des domaines variés, notamment en biologie et en médecine. L'objet de ce travail consiste à exploiter ce savoir faire pour réaliser des guides optiques permettant la détection et le monitoring du CO2. Des premiers résultats ont été obtenus en transmission classique entre deux fibres infrarouges. Ils ont montré qu'il est possible de détecter jusqu'à 0.5% de CO2. L'objectif actuel est d'améliorer la sensibilité de détection au dioxyde de carbone par une augmentation de la surface de contact gaz-fibre, en utilisant des fibres microstructurées. Une autre voie consiste à fabriquer des guides planaires qui nous permettent d'envisager, à terme, la réalisation de micro-composants optiques en verre de chalcogénure avec une robustesse et une compacité accrue

Linear and Nonlinear Characterizations of Chalcogenide Photonic Crystal Fibers

International audienceIn this paper, we investigate the linear and nonlinear properties of GeSbS and AsSe chalcogenide photonic crystal fibers. Through several experimental setups, we have measured the second- and third-order chromatic dispersion, the effective area, losses, birefringence, the nonlinear Kerr coefficient as well as Brillouin and Raman scattering properties

Nonlinear optical properties of chalcogenide glasses measured by Z-scan

International audienc

All-optical poling in chalcohalogenide and lead salt silicate glasses

International audienc

Nonlinear optical properties in chalcogenide vitreous systems

International audienc

Management of OH absorption in tellurite optical fibers and related supercontinuum generation

International audienceWe report the fabrication and the characterization of low OH content and low loss tellurite optical fibers. The influence of different methods of glass fabrication on fiber losses has been investigated. The use of the purest commercial raw materials can reduce the losses below 0.1 dB/m at 1.55 μm. Incorporation of fluoride ions into the tellurite glass matrix makes the optical fibers transparent up to 4 μm. A suspended core microstructured fiber has been fabricated and pumped by nanojoule-level femtosecond pulses, thus resulting in more than 2000-nm bandwidth supercontinuum after a few centimeters of propagation

Chalcogenide glasses with high nonlinear refractive index

International audienc

Recent advances in the development of holey optical fibers based on sulfide glasse

conference 6128 " Photonic Crystal Materials and Devices IV ", topic " Nanotechnologies in Photonics ", session 6 " Photonic Crystal Fibers ", [6128-19]International audienceMicrostructured optical fibers as new optical objects have been developed in the recent past years, firstly from silica glass and then from other oxide glasses such as tellurite or different heavy cations oxide glasses. However very few results have been reported concerning non-oxide glasses and more particularly chalcogenide glasses. In a photonic crystal fiber the arrangement of air holes along the transverse section of the fiber around a solid glassy core leads to unique optical properties, such as for example broadband single-mode guidance, adjustable dispersion, nonlinear properties. Since the effective modal area is adjustable thanks to geometrical parameters, chalcogenide microstructured fibers with small mode area are of interest for nonlinear components because of the intrinsic non linearity of chalcogenide glasses, several order of magnitude above these of the reference silica glass (100 to 1000 times the non linearity of silica glass). On the other hand, chalcogenide holey fibers with large mode area are of interest for infrared power transmission, in a wavelength range out of reach of silica fibers, and more particularly in the 3-5 μm atmospheric window. The aim of this paper is to present more specifically the recent results that have been achieved in the elaboration, light guidance and characterization of photonic crystal fibers from the sulfide Ge20Ga5Sb10S65 glass, which presents a large transparency window from 600 nm to 11 μm

Single mode holey fiber in GeGaSbS chalcogenide glass

oral session TuD "Continuum Generation and Photonic Crystal Fibers" [TuD3]International audienceWe present recent results on the fabrication of a single mode Holey Fiber in GeGaSbS chalcogenide glass using the “Stack&Draw” technique. We measure a Mode Field Diameter of 8,3 µm and we estimate at 200 W-1km-1 the γ value

Er3+-doped GeGaSbS glasses for mid-IR fibre laser application: Synthesis and rare earth spectroscopy

International audienceWith an infrared transparency extended to 10 µm, low multiphonon relaxation rates and suitable rare earth solubility, sulphide glasses in the Ge-Ga-Sb-S system allow radiative emission from rare earth ions in the mid-IR range. The Er3+ ion, widely studied in glass fibres for optical amplification at 1.5 µm, presents an interesting transition for mid-IR applications around 4.5 µm (4I9/2→ 4I11/2). Thus, the aim of this work is to evaluate the Er3+-doped Ge20Ga5Sb10S65 glass as a potential fibre laser source operating in the 3-5 µm mid-IR spectral region. For that purpose, absorption and emission spectra were recorded from visible to mid-IR and the radiative lifetimes of the involved excited levels (4I9/2, 4I11/2 and 4I13/2) were determined. Experimental results were compared with those obtained from a Judd-Ofelt analysis based on the absorption cross-sections of all observable transitions. The 4I9/2 radiative quantum efficiency was estimated to be 64% and the emission cross-section at 4.6 µm was found equal to 2.85 X 10-21 cm2. Core only and core/clad Er3+-doped Ge20Ga5Sb10S65 glass fibres were successfully drawn with minimum optical losses of about 1.5 and 10 dB/m at 5.2 and 3.5 µm, respectively. Fluorescence signals in the mid-IR (at 2.7 and 4.6 µm) were clearly observed with both fibres