The role of tungsten oxide in Er-doped bismuth-germanate glasses for optical amplification in L-band.

A series of novel Er-doped bismuth-germanate glasses containing different tungsten concentrations with a molar composition of 97.5[(75 - x)GeO-25BiO-(x)WO]-2SbO-0.5ErO (x = 5, 10, 15, 20, and 25 mol%) were fabricated.

Photoluminescence properties of Er and Er/Yb doped tellurite glass and glass-ceramics containing BiTeO crystals.

Glass and glass-ceramics containing nanocrystals of BiTeO cubic phase co-doped with Er and Yb were prepared by heat treatment of the precursor tellurite glass and investigated for optical applications. Lanthanide doped tellurite glass and glass-ceramics have been extensively investigated because of their optical and photoluminescence performance for technological photonic applications. Er and Er/Yb doped TeO-GeO-KO-BiO tellurite glass compositions were prepared by the conventional melt-quenching method.

Unprecedented multiphonon vibronic transitions of erbium ions on copper nanoparticle-containing tellurite glasses.

Erbium-doped tellurite glass containing copper nanoparticles showed multi-band emission of one particular transition (I→I, at 980 nm) due to electron-lattice coupling. The present study reports the vibronic transitions of intraconfigurational 4f transitions of Er ions in a tellurite host matrix at room temperature for the first time. The mechanisms of multiphoton transitions and the effect of laser heating are discussed here.