Recent Achievements in Development of Chalcogenide Optical Fibers for Mid-IR Sensing

Abstract

Recent results of research of passive and active optical waveguides made of high-purity chalcogenide glasses for middle infrared fiberoptic evanescent wave spectroscopy of liquid and gaseous substances are presented. On the basis of selenide and telluride glass fibers, novel types of highly sensitive fiber probes are developed. On the basis of Pr(3+)- and Tb(3+)-doped Ga(In)-Ge-As-Se and Ga-Ge-Sb-Se glass fibers, the 4.2–6 μm wavelength radiation sources are created for all-fiber sensor systems. Successful testing of chalcogenide glass fiber sensors for the analysis of some liquid and gaseous mixtures was carried out.

Tunable nanophotonic multilayer structures to control mid-infrared atmospheric windows

“…Our research is particularly focused on the mid-IR atmospheric window, ranging from 3 to 5 µm. This segment is crucial due to its minimal atmospheric absorption and distinct transmission properties [6], making it highly relevant for spectroscopy [7] and sensing applications [8]. The significance of this wavelength range is further underscored by its ability to detect specific gas absorption lines, such as those for carbon dioxide and methane.…”