Abstract
High-purity and well-dehydrated (hydroxyl absorption at 3.3 µm no more than 0.02 cm−1) rare-earth ions doped glasses of ZnO–TeO2 system were synthesized. The luminescent properties of Tm3+, Er3+, Ho3+ and Dy3+ ions were investigated in the prepared glass samples. The performed investigations had shown that zinc-tellurite glass is quite a promising host for 2.3 µm Tm3+ and 2.7 µm Er3+ lasers. Pulsed 2.3 µm laser action with output energy up to ~ 12 mJ was demonstrated in bulk Tm3+ doped tellurite glass. The losses in the fiber made of Tm-doped glass were not exceeding 0.8 dB/m (~ 2 × 10−3 cm−1) in the spectral range of 2.1/2.7 µm.
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