Electronics Letters · 1992 · 35 citations · 0 references
Natural SciencesMaterials SciencePhysicsOptical MaterialsOpticsPhotonicsFiber OpticsGlass MaterialsLaser PhysicsOptical FibersOptical GlassesRare-earth-doped MaterialsFiber LasersGlass Host MaterialsLaser Gain MaterialsPhonon-phonon InteractionsQuantum EfficiencyRare Earth-doped GlassesRare-earth-doped FibersRare-earth-doped Glasses
The first fibre laser based on rare-earth doped lead-germanate glass is reported. The thulium-doped fibre had a background loss of 2dBm−1 and a maximum phonon energy of ̃920cm−1. Lasing was achieved on the Tm3+3H4 – 3H6 transition at 1.905μm with a 3.6 mW threshold, when diode-pumped at 790 nm. A quantum efficiency of 30% was obtained.