Bruno Bureau
Université de Rennes 1, France
Title: Telluride glass fibers for mid-infrared sensing: From medical diagnosis to the detection of exo-planet
Biography
Biography: Bruno Bureau
Abstract
The glass-forming ability of chalcogens combinations has been known for several decades, but, compared to oxide glasses, especially silicates; this class of vitreous materials is just emerging in particular in order to shape optical fibers. The main attention paid to these materials relies on their large optical window extending in the mid-infrared giving access to molecular fundamental vibrational modes shifted far in the IR. This exceptional transparency, associated with suitable viscosity/temperature dependence is a favorable context to seize the opportunity to develop innovative optical fibers for mid-infrared sensing. Such fibers have been used in various frames with different final users in biology with INSERM, medical diagnosis with the Public City Hospital in Rennes, for CO2 detection to strike against the global warming or for the Darwin mission of the European Space Agency (ESA). For each application, a special strategy is implemented in material science and optical fiber engineering. The talk will be devoted to the description of the last achievements in the field. A focus will be proposed on the new pure-telluride glasses which enable to expand the spectral working window further in the mid-IR until 20 µm.
