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Proceedings Paper

Research of the temperature measurement of high-energy laser energy meter and energy loss compensation technique
Author(s): Xun Yu; Hui Wang; Ji'an Wu; Fang Wang; Qian Li
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Paper Abstract

The energy measurement of high energy laser is converts incident laser energy into heat energy, calculates energy utilizing absorber temperature rise, thus the energy value can be gained. Temperature measurement of high-energy laser energy meter and energy loss compensation during the course of the measurement were studied here. Firstly, temperature-resistance characteristics of resistance wire was analyzed, which was winded on exterior surface of the absorbing cavity of high-energy laser energy meter and used in temperature measurement. Least square method was used to process experiment data and a compensation model was established to calibrate the relationship of temperature vs. resistance. Experiment proved that, error between resistance wire and Pt100 is less than 0.01Ω and temperature error is less than 0.02°C. This greatly improves accuracy of the high energy meter measurement result. Secondly, aimed to the compensation of laser energy loss caused by absorbing cavity's heat exchange, the heat energy loss of absorbing cavity, resulted from thermal radiation, heat convection and heat conduction was analyzed based on heat transfer theory. Its mathematics model was established. Least square method was used to fit a curve of experiment data in order to compensate energy loss. Repetitiveness of measurement is 0.7%, which is highly improved.

Paper Details

Date Published: 20 November 2009
PDF: 10 pages
Proc. SPIE 7511, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 75111O (20 November 2009); doi: 10.1117/12.838014
Show Author Affiliations
Xun Yu, Xi'an Technological Univ. (China)
Hui Wang, Xi'an Technological Univ. (China)
Ji'an Wu, Xi'an Institute of Applied Optics (China)
Fang Wang, Xi'an Institute of Applied Optics (China)
Qian Li, Xi'an Technological Univ. (China)


Published in SPIE Proceedings Vol. 7511:
2009 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems

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