Phase sensitivity to axial strain of microstrustured optical silica fibers

International audienceWe compare, thanks to a Sagnac interferometer, the phase sensitivity to strain of different microstructured optical silica fibers (MSF) that we design and fabricate. Our results show that when a same elongation is applied to different MSF, the induced phase change is equal or lower than the one obtained for a standard fiber, showing no advantage on this parameter for sensing applications

Verres fluores a base de metaux lourds : purification, corrosion par l'eau, determination du coefficient d'extinction molaire de OH-

SIGLECNRS T 58259 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Microstructured chalcogenide fibers for biological and chemical detection: case study: a CO2 sensor

International audienceChalcogenide glasses are well known materials due to their transparency in the infrared optical range and their ability to be drawn into optical fibers. Such fibers can transmit light from 1 to 20 μm depending on the composition of the glass constituting the fiber. Besides, microstructured silica fibers have been successfully used as fiber sensors as the holes can be filled with liquid or gas to achieve overlap of the mode field (doing the sensing) and the sample. Since gas generally shows a characteristic optical absorption spectrum in the mid-infrared, it can be detected selectively and quantitatively in a given environment by analysing mid-IR spectra, in a region where silica fibers can't be used due to their low transmission. Microstructured optical fibers made of chalcogenide glass will permit to implement this measurement and detect species such as CO2 through its absorption band near 4.2 μm

Fabrication et Applications des Fibres Microstructurées

session orale Me1 « Fibres microstructurées et Autres fibres spéciales » [Me1.0]National audienceLes fibres microstructurées trouvent des applications dans de nombreux domaines grâce à des propriétés optiques remarquables. Une flexibilité de dispersion chromatique et un fort confinement optique rendent ces fibres très intéressantes pour multiples applications en optique non-linéaire dans le visible et le proche infrarouge pour les fibres en verre de silice, et dans le moyen infrarouge pour les fibres en verre de chalcogénure. La fabrication de ces fibres est particulièrement délicate (contrôle de géométrie, risque de contamination). Nous présenterons les étapes critiques de fabrication et leur impact sur les propriétés optique pour les fibres à base de verre de silice et de verre de chalcogénure. Nous présenterons également plusieurs applications afin de souligner l'importance d'un procédé de fabrication bien contrôlé

Low Loss, Low OH, Highly Non-linear Holey Fiber for Raman Amplification

International audienceWe present a highly non linear holey fiber with low loss and low OH absorption which enables us to demonstrate efficient Raman amplification in the C band with pump wavelengths of 1453 and 1480 nm