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Chalcogenide optical fibers for mid-​infrared sensing

Abstract : Chalcogenide glasses are a matchless material as far as mid-infrared (IR) applications are concerned. They transmit light typically from 2 to 12 μm and even as far as 20 μm depending on their composition, and numerous glass compositions can be designed for optical fibers. One of the most promising applications of these fibers consists in implementing fiber evanescent wave spectroscopy, which enables detection of the mid-IR signature of most biomolecules. The principles of fiber evanescent wave spectroscopy are recalled together with the benefit of using selenide glass to carry out this spectroscopy. Then, two large-scale studies in recent years in medicine and food safety are exposed. To conclude, the future strategy is presented. It focuses on the development of rare earth-doped fibers used as mid-IR sources on one hand and tellurium-based glasses to shift the limit of detection toward longer wavelength on the other hand.
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https://hal.archives-ouvertes.fr/hal-00998416
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Bruno Bureau, Catherine Boussard-Plédel, Shuo Cui, Radwan Chahal, Marie-Laure Anne, et al.. Chalcogenide optical fibers for mid-​infrared sensing. Optical Engineering, SPIE, 2014, 53 (2), pp.027101/1-027101/7. ⟨10.1117/1.OE.53.2.027101⟩. ⟨hal-00998416⟩

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