Novel Ga-Sb-S chalcogenide glasses doped with different amount of Dy3+ ions were prepared. Their thermal stability, optical properties, and mid-infrared (MIR) emission properties were investigated. The glasses show good thermal stability, excellent infrared transparency, very low phonon energy (similar to 306 cm(-1)), and intense emissions centered at 2.95, 3.59, 4.17 and 4.40 mu m. Three Judd-Ofelt intensity parameters (Omega(2)= 8.51 x 10(-20) cm(2), Omega(4)=2.09 x 10(-20) cm(2), and Omega(6)
