ABCTRACT 2.0μm emission properties of Ho 3+ -Yb 3+ co-doped tellurite oxy-halide glass exited by 980nm LD is reported. Mid-infrared transmittance property of glass was investigated by Fouriertransform infrared (FTIR) spectrometer. The Judd-Ofelt intensity parameters Ω = 2,4,6 , spontaneous radiative transition probabilities, branching ratios and radiative lifetime of Ho 3+ were calculated according to the absorption spectra by using Judd-Ofelt theory. The absorption, emission cross-sections and gain coefficient of Ho 3+ : 5 I 7 → 5 I 8 are calculated based on the McCumber and Reciprocity theories. Results indicate that the maximum 2.0μm emission intensity of Ho 3+ was achieved at 0.15mol% Ho 2 O 3 and 1.5mol% Yb 2 O 3 concentrations in tellurite oxy-halide glass. The maximum absorption and stimulated emission cross-section of Ho 3+ near 1944nm are 6.37 × 10 at 2.0μm and 10.94 × 10 , respectively. The results suggest Ho 3+ -Yb 3+ co-doped tellurite oxy-halide glass is a good candidate for efficient 2.0μm laser.
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