29 July 2002 Decrease in the uncertainty of laser radiation average power measurement with the aid of discrete Fourier transform
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Proceedings Volume 4900, Seventh International Symposium on Laser Metrology Applied to Science, Industry, and Everyday Life; (2002); doi: 10.1117/12.484583
Event: Seventh International Symposium on Laser Metrology Applied to Science, Industry, and Everyday Life, 2002, Novosibirsk, Russian Federation
Abstract
In this paper, a method of increasing the accuracy and sensitivity of optical radiation average power measurements with the aid of a black body (BB) is proposed and studied experimentally. The essence of the method consists in matched Wiener filtration of the results of measuring the kinetics of BB heating up with the aid of the discrete Fourier transform and the method of least squares when the Fourier spectra of the process under study are compared with a model spectrum. The Fourier spectrum of BB heating up at high levels of optical radiation power (when the BB temperature drift can be neglected) is used as the model one. A decrease in the total uncertainty by a factor of 3 to 5 has been attained at low levels of optical radiation power.
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Mark L. Gourari, A. A. Kostin, Anatolyi A. Liberman, V. E. Liandres, "Decrease in the uncertainty of laser radiation average power measurement with the aid of discrete Fourier transform", Proc. SPIE 4900, Seventh International Symposium on Laser Metrology Applied to Science, Industry, and Everyday Life, (29 July 2002); doi: 10.1117/12.484583; http://dx.doi.org/10.1117/12.484583
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KEYWORDS
Calibration

Fourier transforms

Radiation effects

Black bodies

Optical testing

Sensors

Temperature metrology

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