Title :
High-efficiency CW operation of 890 nm pumped holmium fluoride fibre laser
Author :
Davey, S.T. ; Swain, N.A. ; King, T.A.
Abstract :
Highly efficient CW operation has been observed from the holmium transition centred at 2.024 mu m in a Tm:Ho codoped single-mode fluoride fibre laser. When pumping holmium directly at 890 nm a minimum threshold of 8.2 mW launched pump power was observed for oscillation at 2.076 mu m. A maximum slope efficiency of 30% was achieved for operation at 2.054 mu m, which corresponds to a photon conversion efficiency of 69%.
Keywords :
fibre lasers; holmium; laser modes; laser transitions; optical pumping; thulium; 2.024 to 2.076 micron; 30 percent; 69 percent; 8.2 mW; 890 nm; CW operation; co-doped optical fibre; fluoride fibre laser; maximum slope efficiency; photon conversion efficiency; single-mode;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19921323
