New efficient materials for the luminescence on the base of PbO-Bi2O3-Ga2O3-BaO-Ho3+ glasses

Infrared and red luminescence from Ho3+ ions embedded in PbO-Bi2O3-Ga2O3-Ba O glass hosts is reported for room and helium liquid temperatures. The subs tantial influence of energy transfer processes between the host and Ho3+ io ns is shown experimentally through the dependences of photoluminescence on light polarization and excitation wavelength. Only polarized excited pulsed XeII laser light (lambda = 714 nm) gives substantial luminescence with eff iciency of up to 14.3%. Role of phonon-relaxation subsystem in the observed luminescence is discussed. (C) 2001 Elsevier Science B.V. All rights reser ved.