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In this study, a new chalcohalide glass system, Ga2S3-Sb2S3-CsI, is reported. It has a glass-forming domain composed of ~0-35 mol% Ga2S3, ~15-95 mol% Sb2S3, and ~0-55 mol% CsI. The glasses have a wide transparent window of ~0.7-13.5 μm, high third-order nonlinear refractive indices of ~1.7-8.7×10−14 cm2/W @ 1.55 μm, and relatively short zero group-velocity-dispersion wavelengths of 3.8-5.15 μm. The glasses can dissolve more than 2 mol% active ions (e.g., Dy3+), and the doped glasses show intense emissions in the mid-infrared. These superior properties demonstrate their good potentials for mid-infrared applications such as thermal imaging, nonlinear photonics and lasers. [ABSTRACT FROM AUTHOR]

In this work, a new chalcohalide glass system, Ga 2 S 3 Sb 2 S 3 CsCl (GSSC), is reported. The glass-forming ability and the physical properties are investigated; and the potential applications of these glasses are evaluated. The glass forming ability can be remarkably improved when CsCl is added into Ga 2 S 3 Sb 2 S 3 glasses, and the compositions with more than 30% CsCl possess quite good thermal stability against crystallization. The studied GSSC glasses have transition temperatures of 217–250 °C, densities of 3.42–3.97 g/cm 3 , micro-hardness of 1.12–1.88 GPa, a transparent window of ∼0.56–13.4 μm, linear refractive indices of 1.99–2.58 @ 10 μm, nonlinear refractive indices of 1.1–11.9 × 10 −14 cm 2 /W @ 1030 nm, and zero group-velocity-dispersion wavelengths of 3.37–5.15 μm. The wide transparent window and the superior optical nonlinear property make these glasses good optical materials for infrared imaging and nonlinear photonics. [ABSTRACT FROM AUTHOR]