S. Boj et al., HIGH-EFFICIENCY DIODE-PUMPED THULIUM-DOPED SILICA FIBER LASERS WITH INTRACORE BRAGG GRATINGS IN THE 1.9-2.1-MU-M-BAND, Electronics Letters, 30(13), 1994, pp. 1019-1020
Diode pumped continuous wave laser oscillation at wavelengths between
1.9 and 2.1 mum in a thulium doped silica fibre that uses Bragg reflec
tors for cavity feedback is reported. These lasers exhibit low pump po
wer thresholds and quantum efficiencies close to unity.