Synthesis and downconversion photoluminescence of Erbium-doped chalcohalide glasses of AgCl(I)-GaS-LaS systems.

Erbium-doped chalcohalide glasses of the ()-- systems were synthesized by using the melting-cooling method. The introduction of a halide component leads to a decrease in the absorption coefficient, and the addition of erbium leads to the emergence of narrow absorption bands associated with transitions in the f-shell of ions. Five PL bands were detected in erbium-doped samples when excited by a laser with a 532 nm wavelength, the most intense of which at 980 nm and 1540 nm are promising for use in optical amplifiers and fiber optic networks.