Rare-earth ions doped zinc-tellurite glass for 2 ÷ 3 µm lasers
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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.
Synthesis, experimental characterization and theoretical study of luminescent and laser characteristics of tellurite glasses were supported by Russian Science Foundation (No. 17-12-01324). Doped fiber production and investigation were supported by the Presidium of the Russian Academy of Sciences (basic research program no. 32 “Nanostructures: physics, chemistry, biology, foundations of technology”).
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Conflict of interest
The authors have no competing interests to declare.
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