PR3-DOPED GE-GA-S GLASSES FOR 1.3-MU-M OPTICAL-FIBER AMPLIFIERS()

The synthesis and optical properties of Pr-doped Ge-Ga-S glasses are r eported. The radiative properties associated with the important (1)G(4 ) --> H-3(5) transition of pr(3+) at 1.3 mu m have been determined by absorption and fluorescence measurements coupled with Judd-Ofelt analy sis. As compared with ZBLAN glass, Pr-doped Ge-Ga-S glasses have a lon ger fluorescence lifetime and a larger stimulated emission cross-secti on, which are favorable for an efficient fiber amplifier. The concentr ation quenching of Pr3+ in these glasses has also been studied by fluo rescence lifetime measurements.