Chalcogenide glass fibre

Asobe M., Ohara T., Yokohama I., and Kaino T., Low power all-optical switching in a nonlinear optical loop mirror using chalcogenide glass fibre. Electron. Lett, 32,1396-1397 (1996). 

Fig. 3. Composite loss spectra for some common IR fibre optics ZBLAN fluoride glass SC sapphire, chalcogenide glass, PC AgBrCl, and hollow glass waveguide plot reproduced from Harrington, 2010.

Chalcogenide glasses from the Ge-Se system exhibit relatively low glass transition temperatures (from 41 (Se) to 340°C (Ge4oSe6o) and low activation enthalpy for flow (from 285 to 592 kJ/mol). As a consequence, they experience a time or rate dependent hardness at room temperature, especially for chalcogen-rich compositions (Fig. 3). Therefore, on one hand, these glasses offer a unique opportunity to study viscoelasticity at room-temperature, as was already mentioned earlier, but on the other hand, structural parts such as lens or fibres for applications in night visibility optical devices or in thermometry, are likely to suffer from creep deform-... 

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