ABSTRACT
We present recent results on the development of a new active laser medium—bismuth (Bi)-doped optical fibres and the creation of Bi-doped fibre lasers and optical amplifiers for a spectral region of 1150–1800 nm. First, the necessity of the development of new types of lasers and optical amplifiers and their possible applications will be outlined. Then, distinctive features of bismuth as an active element and the nature of Bi-related emitting centres will be discussed. Subsequently, the absorption and luminescence spectra of various Bi-doped fibres will be presented. Finally, the results of the creation of efficient CW Bismuth-doped fibre lasers, optical amplifiers and superfluorescence sources for a spectral region 1150–1800 nm will be reported. In conclusion, we will discuss some problems to be solved to further improve the characteristics of these fibre devices.
