Co-doping effects in erbium3+- and holmium3+-doped ZBLAN glasses

The route toward a diode-pumped 1-W erbium 3-/spl mu/m fiber laser

“…will probably be higher than those reported in [12] and [20] because of the smaller erbium concentration. The lifetimes used for the simulation correspond to a Pr concentration of 2000 ppm mol.…”

“…The cross relaxation saturates as soon as it seizes the whole [12] and [20] and are reproduced in Table I. The given Pr 3+ concentrations and Er 3+ lifetimes are valid for 40000 ppm mol.…”

“…The lifetime quenching of the erbium and laser levels of the 2.7-m transition by Pr co-doping was experimentally investigated in ZBLAN [12], [20] and BaY F [21]. In both cases, a strong quenching of the lifetime of the lower laser level versus a moderate quenching of the upperlevel lifetime was found.…”

“…In both cases, a strong quenching of the lifetime of the lower laser level versus a moderate quenching of the upperlevel lifetime was found. The values [12], [20] obtained for 40 000 ppm mol. erbium concentration in ZBLAN are given in Table I.…”

“…In this paper, it is assumed that a similar lifetime quenching can be obtained with an erbium concentration of 20 000 ppm mol. The required praseodymium concentrations [12] AND [20] The data are valid for an erbium concentration of 40000 ppm mol.…”