Monitoring of laser heating temperature in laser spectroscopic measurements |
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| Authors: | W.W. Zhang Y.Q. Gao X.D. He S. Li |
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| Affiliation: | 1. Faculty of Engineering and Computer Science, University of Applied Sciences, 49009 Osnabrück, Germany;2. Fraunhofer Institute for Laser Technology ILT, Steinbachstrasse 15, 52074 Aachen, Germany;1. Laboratory of Precision Physical Quantity Measurement, Xi''an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi''an, 710119, China;2. Xi''an Modern Control Technology Research Institute, Xi''an 710065, Shaanxi, China;3. Changchun University of Science and Technology, China;1. Nihon University, 7-24-1 Narashinodai, Funabashi, Chiba, 274-8501, Japan;2. The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585, Japan;3. Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo, Sagamihara, Kanagawa, 252-5210, Japan;1. Department of Physics, University of Seoul, Seoul 02504, Republic of Korea;2. Department of Energy & Environmental System Engineering, University of Seoul, Seoul 02504, Republic of Korea;3. Center for Opto-electronic Materials and Devices, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea;4. IGBT Part, System IC R&D Laboratory, LG Electronics, Seoul 06772, Republic of Korea;5. Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA 24061, United States;6. Center for Electronic Materials, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea;7. KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Republic of Korea;8. Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang 37673, Republic of Korea |
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| Abstract: | During laser spectroscopic measurement, a part of laser energy will be converted into heat in the processes of excitation and light emission. Temperature monitoring can help to evaluate such nonradiative process. Upconversion luminescence of phosphor Y2O3:Er,Yb under laser excitation at 980 nm was investigated in this work. Point temperature of the phosphor was monitored using the fluorescent intensity ratio (FIR) technology. Laser induced temperature rising was identified by comparison with a theoretically ideal temperature calibration function: lnR = 3.1738–1167/T. The monitored temperature of laser heating rises monotonically with increasing laser power. Circumstances around heating point will modify the calibration function, but the linear slope of lnR ~ 1/T is constant. |
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