Upconversion luminescence of Er[sup 3+] in CdX[sub 2] system glasses (X=CI, Br, I).

Examines the upconversion luminescence characteristics of erbium cations in CdX[sub 2]-based halide glasses (X=CI, Br, of I). Details on the linewidth of green emission for halide glasses; Observation of blue upconversion luminescence for CdCl[sub 2] and CdBr[sub 2] system glasses; Dependence of multiphoton relaxation rate on the phonon energies of hosts.