Calibrated CO2-laser power calorimeter

Wilfried Plass; Andreas Voss; N. Schmid; Adolf Giesen

doi:10.1117/12.259911

20 November 1996 Calibrated CO₂-laser power calorimeter

Wilfried Plass, Andreas Voss, N. Schmid, Adolf Giesen

Proceedings Volume 2870, Third International Workshop on Laser Beam and Optics Characterization; (1996) https://doi.org/10.1117/12.259911
Event: Third International Workshop on Laser Beam and Optics Characterization, 1996, Quebec City, Canada

Abstract

A continuously measuring carbon-dioxide laser power calorimeter designed for laser powers up to 25 kW is presented. The absorption of the detector is shown to be 99.98% at 10.6 micrometer and 99.1% at 1.06 micrometer. The flow-rate of the coolant is measured by determining the temperature increase due to an equivalent electrical heating of the coolant before the detector. An electrical calibration proves an accuracy of plus or minus 1% in the range from 40 W to 4 kW. A comparison with an instrument calibrated at the Physikalisch Technische Bundesanstalt (PTB) reveals a deviation of less than 0.5% at 850 W. The online-precision is limited by a relative and an absolute noise signal of 0.5% and 5 W, respectively. Methods to reduce the measurement errors occurring in the calorimetric design are presented.

Citation Download Citation

Wilfried Plass, Andreas Voss, N. Schmid, and Adolf Giesen "Calibrated CO₂-laser power calorimeter", Proc. SPIE 2870, Third International Workshop on Laser Beam and Optics Characterization, (20 November 1996); https://doi.org/10.1117/12.259911

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