Spectroscopic study on super-fluorescence of Nd-doped glass fibers has been carried out. The laser emission characteristics around 910nm, 1060nm and 1350nm of Nd-doped glass fibers pumped by Ar+ laser and Ti:sapphire laser have been reported and analyzed. Up-conversion emission in Nd-doped glass fibers has been studied. The mechanism of up-conversion has been proposed too.
"Nd-doped glass-fiber lasers and up-conversion lasers", Proc. SPIE 3416, Infrared Glass Optical Fibers and Their Applications, (28 September 1998); doi: 10.1117/12.323381; https://doi.org/10.1117/12.323381