Rm. Percival et al., 1.6 MU-M SEMICONDUCTOR DIODE-PUMPED THULIUM-DOPED FLUORIDE FIBER LASER AND AMPLIFIER OF VERY HIGH-EFFICIENCY, Electronics Letters, 29(24), 1993, pp. 2110-2112
Results on a 1.6mum semiconductor diode pumped thulium fibre laser ope
rating in the 1.9mum region are presented for the first time. A minimu
m threshold of 0.60mW and a maximum slope efficiency of 80% with respe
ct to launched pump power have been observed. In addition gain values
of 14.5dB have been achieved for 2.98mW of launched pump power indicat
ing that a gain efficiency of 4.9dB/mW is possible.