The As2Te3-based chalcogenide-halide glasses, which are strong candidates for infrared optical fibers, are studied. This paper investigates the glassforming regions of two quasi-ternary As2Te3-based systems. The glass-forming abilities are studied by differential thermal analysis ( DTA ) . For the studied compositions,the glass transition temperatures (Tg) of As2Te3-PbTeHgI2 glasses are higher than those of As2Te3-PbTe-PbI2glasses and As2Te3-HgI2 glasses. With a wider infrared transmission range and the improvements in the thermal properties of the HgI2 doped glasses, As2Te3-based glasses may lead to far-IR optical fiber development.
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