The spectroscopic properties of Sm3+ ions in fluorozirconate fiber are
presented. We found that our results were not in full agreement with
previous research on Sm3+ doped silica. We observed that the visible e
mission bands have a relative strength closer to unity, and we measure
d a fluorescence lifetime that is three times longer than previously r
eported. The implications of these findings on the role of Sm3+ in zir
conium barium fluoride glass and on the operation of Sm3+ doped fiber
devices are discussed. (C) 1997 Optical Society of America.