Efficient all-fiber bismuth-doped laser

In the present letter the authors report on the realization of an all-fiber bismuth-doped laser with laser emission that can be chosen with corresponding fiber Bragg gratings between at least 1150 and 1225 nm. In their experiments they achieved a slope efficiency of about 24% at 1200 nm, which is the highest reported for this kind of laser. (c) 2007 American Institute of Physics.