Amplified spontaneous emission measurements for three types of erbium-doped
silica fibers are presented. The characteristic parameters of these fibers
was previously obtained employing gain and pump power measurements. A theo
retical model for erbium-doped silica fiber amplifiers is evaluated and its
scarcities are analyzed by means of a comparison between experimental and
theoretical results for gain and copropagating amplified spontaneous emissi
on.