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Lasing at 1065 nm in bulk Nd-doped telluride-tungstate glass |
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| Authors: | Hamit Kalaycioglu Gonul Ozen Alphan Sennaroglu |
| Institution: | a Laser Research Laboratory, Department of Physics, Koç University, Rumelifeneri, Sariyer, 34450 Istanbul, Turkey b Department of Physics, Istanbul Technical University, Maslak, 34469 Istanbul, Turkey c Department of Chemical and Metallurgical Engineering, Istanbul Technical University, Maslak, 34469 Istanbul, Turkey |
| Abstract: | We have achieved, for the first time to our knowledge, lasing in a new type of telluride-tungstate glass host doped with neodymium: Nd3+:(0.8)TeO2-(0.2)WO3. Lasing was obtained at 1065 nm with two samples containing 0.5 mol% and 1.0 mol% Nd2O3. During gain-switched operation, slope efficiencies of 12% and 10% were obtained with the 0.5 mol% and 1.0 mol% doped samples, respectively, at a pulse repetition rate of 1 kHz. Judd-Ofelt analysis was further employed to determine the emission cross section σe at 1065 nm from the absorption spectra and lifetime data. The emission cross section from the Judd-Ofelt analysis came to 3.23 ± 0.09 × 10−20 cm2, in reasonable agreement with the value of 2.0 ± 0.13 × 10−20 cm2 obtained from the analysis of laser threshold data. |
| Keywords: | 42 55 Rz 42 70 Ce 42 72 Ai 42 60 Lh 78 55 Qr |
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