B. Srinivasan et al., High-power (400mW) diode-pumped 2.7 mu m Er : ZBLAN fibre lasers using enhanced Er-Er cross-relaxation processes, ELECTR LETT, 35(16), 1999, pp. 1338-1340
The authors report the use of enhanced inter-ion cross-relaxation in Er:ZBL
AN fibres of double clad geometries for the realisation of high-power (400m
W) diode-pumped 2.7 mu m lasers. Thr enhanced Er-Er cross-relaxation was en
abled by the formation of clusters. around drawing-induced defects, even at
moderate mean doping densities in such fibres. Further extension of this w
ork should enable multi-Watt CW power level lasers at 2.7 mu m in the fores
eeable future.