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20 February 2014 Chalcogenide microstructured optical fibers for chemical sensing
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Chalcogenide glasses are known for their transparency in the infrared optical range and their ability to be drawn as fibers. Such optical fibers can transmit light from 2 to 20 μm depending on the composition of the glass constituting the fiber. They are consequently good candidates to be used in biological/chemical sensing. Different types of fiber can be used: single index fibers or microstructured fibers. Besides, a new configuration of microstructured fibers has been developed: microstructured exposed-core fibers. This design consists of an optical fiber with a suspended micron-scale core that is partially exposed to the external environment.
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Johann Troles, Perrine Toupin, Laurent Brilland, Catherine Boussard-Plédel, Bruno Bureau, David Mechin, and Jean-Luc Adam "Chalcogenide microstructured optical fibers for chemical sensing", Proc. SPIE 8938, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIV, 893817 (20 February 2014);

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