| 光谱学与光谱分析 |
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| Investigation on the Fabrication and Spectrum Properties of Yb3+-Doped Silicate Laser Glasses |
| DONG Shi-rui1, HOU Lan-tian1,2, JIN Tao-tao1, HAN Ying1, XIA Chang-ming1, NIU Jing-xia1, ZHOU Gui-yao1,2, LIANG Dan-hua1, LI Rui1 |
1. Institute of Infrared Optical Fibers and Sensors, Yanshan University, Qinhuangdao 066004, China
2. Key Laboratory of Metastable Material Fabrication Technology and Science, Yanshan University, Qinhuangdao 066004, China |
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Abstract Two kinds of Yb3+ doped silicate laser glass with little difference were produced by high temperature of melting process. The absorption and emission spectra of the two glass samples were tested by the correlative spectrographs; the integral absorption cross section, stimulated emission cross section, fluorescence line-width, fluorescence lifetime, least particle count, saturation pump intensity and least pump intensity of the Yb3+-doped laser glasses were calculated respectively, and by comparison it was found that the chart of the absorption cross section is similar to the stimulated emission cross section calculated by the reciprocity method, and is very different from the stimulated emission cross section calculated by the Fuchbauer-Ladenburger method. This result is precisely in line with the theoretical analysis. The line-types of the absorption spectra of the two glass samples are almost the same, and the first peak value of absorption is located at 975 nm while the second peak value is at 908 nm. As the two components of the samples are not very different, the accord of the line-types of the absorption spectra indicates that the makeup of the glass material is the primary factor influencing the line-type of the absorption spectra. The fluorescence spectra of the two glass samples are very different, and the first fluorescence peak value of sample one is located at 993 nm with the second peak value at 1 029 nm, while the first fluorescence peak value of sample two is located at 1 035 nm with the second peak value at 994 nm. The cause of the major difference in the fluorescence spectra of two samples lies in the different doping density of Yb3+. By comparison we found that the laser performance of sample two is better than that of sample one. The test shows that both samples are suitable for drawing fiber.
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Received: 2008-09-06
Accepted: 2008-12-08
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