Abstract :
A near theoretical maximum slope efficiency of 37% (90% photon conversion) has been demonstrated at 1.925 mu m by forcing simultaneous operation of the 1.82 and 2.31 mu m transitions in a thulium-doped ZBLAN fibre. In addition significant amounts of tunable output power, >30 mW, have been observed over a range of 40 nm from 1.818 to 1.858 mu m for a launched pump power of 183 mW.
Keywords :
aluminium compounds; barium compounds; fibre lasers; fluoride glasses; lanthanum compounds; laser tuning; sodium compounds; thulium; zirconium compounds; 1.818 to 2.31 micron; 183 mW; 30 mW; 37 percent; Tm-doped fluoride fibre laser; Tm:ZBLAN optical fibre; ZrF 4-BaF 2-LaF 3-AlF 3-NaF:Tm; high efficiency; launched pump power; maximum slope efficiency; tunable operation; tunable output power; two colour laser;
