The effect of La₂O₃ in Tm³⁺-doped germanate-tellurite glasses for ~2 μm emission.
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ABSTRACT: A germanate-tellurite glass (GeO2-TeO₂-K₂O-Nb₂O₅-La₂O₃) with thulium doping has been investigated for application as a laser material around 2.0 μm regions. Under the 808 nm laser diode pumped, intense 1.8 μm emission is obtained. Based on the absorption spectra, radiative properties are predicted using Judd-Ofelt theory. The maximum value of emission cross-section of Tm(3+) around 1.8 μm can reach 1.46 × 10(-20) cm(2), which indicated that the germanate-tellurite glass may provide high gain as a good medium for efficient 1.8 μm laser system.
SUBMITTER: Peng YP
PROVIDER: S-EPMC4052720 | biostudies-other | 2014
REPOSITORIES: biostudies-other
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