Chalcogenide double index fibers: fabrication, design, and application as a chemical sensor

摘要: Double index chalcogenide fibers, based on tellurium, arsenic, and selenium, have been made by an original technique. This technique, the build-in-casting method, is achieved in a sealed silica ampoule. In view of low attenuation obtained mid-infrared (IR), these fibers are used to implement Fiber Evanescent Wave Spectroscopy (FEWS). As IR light only propagated through core waveguide, chemical etching applied order remove glassy cladding sensing zone. spectra ethanol chloroform, recorded with such sensor, presented showing high sensitivity method.