Synthesis and IR-excited luminescence of (YTm)OS solid solutions.

We have studied the key features of the luminescence spectra and kinetics of (YTm)OS solid solutions in the range 400-2000 nm under laser excitation at 790 and 810 nm. The results have been used to develop a series of IR phosphors 'invisible' under laser excitation in the range 790-810 nm and possessing tunable and reproducible relative intensities of three groups of IR luminescence bands in the ranges 770-840, 1360-1520, and 1650-1980 nm, respectively. [ABSTRACT FROM AUTHOR]