FLUORESCENCE DYNAMICS IN SOME SOLID-STATE LASER MATERIALS EMITTING IN THE INFRARED REGION : Ho3+ DOPED LiYF4 SINGLE CRYSTALS AND FLUORIDE GLASSES J. RUBIN, A. BRENIER, R. MONCORGE, C. PEDRINI, B. MOINE, G. BOULON, J. L. ADAM, J. LUCAS et J. Y. HENRYJ. Phys. Colloques, 48 C7 (1987) C7-367-C7-369DOI: https://doi.org/10.1051/jphyscol:1987788