Lincoln, J.R., Mackechnie, C.J., Wang, J., Brocklesby, W.S., Deol, R.S., Pearson, A., Hanna, D.C. and Payne, D.N.
New class of fibre laser based on lead-germanate glass
Electronics Letters, 28, (11), . (doi:10.1049/el:19920648).
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The first fibre laser based on rare-earth doped lead-germanate glass is reported. The thulium-doped fibre had a background loss of 2 dB/m and a maximum phonon energy of ~920 /cm. Lasing was achieved on the Tm3+ 3H4 - 3H6 transition at 1.905µm with a 3.6mW threshold, when diode-pumped at 790nm. A quantum efficiency of 30% was obtained.
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