Bi. Galagan et al., ERBIUM-SENSITIZED GLASSES FOR PRASEODYMIU M FIBER LASER-AMPLIFIERS OPERATING AT LAMBDA=1.3 MU-M, Kvantovaa elektronika, 23(2), 1996, pp. 109-111
A new medium for praseodymium fibre optical amplifiers is proposed: it
is barium-indium-gallium-thorium fluoride glass sensitised with erbiu
m and ytterbium.