Bi-doped glass optical fibers are a very promising active laser medium. Luminescence of Bi-doped glasses takes place in
a spectral region of 1100-1500 nm , where no fiber lasers (or any other efficient lasers) exist. The glasses have very
broad luminescence bands (200-400 nm) and long lifetime (200-700 μs). The Bi absorption bands are situated in a
spectral region of 500-1100 nm where long-lived high-brightness laser diodes developed for the pumping of lasers and
amplifiers are available. Besides, strong luminescence has been observed in a variety of glass compositions. However, up
to 2005 there had been no reports on the fabrication of Bi-doped optical fibers. The first Bi-doped optical fibers were
fabricated in 2005 [5,6] and that year the first Bi-doped fiber laser was constructed .
In this paper the recent results on the new laser material - Bi-doped glasses and optical fibers are reviewed. First,
luminescence properties of various Bi-doped glasses are discussed. Then we describe the Bi-doped silica-based optical
fiber fabrication by MCVD technique and the absorption and luminescence properties of the fibers. At last the results of
investigations of high-power Bi-doped fiber lasers are presented.
E. M. Dianov, E. M. Dianov,
"Bi-doped optical fibers: a new active medium for NIR lasers and
amplifiers", Proc. SPIE 6890, Optical Components and Materials V, 68900H (5 February 2008); doi: 10.1117/12.770674; https://doi.org/10.1117/12.770674