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Proceedings Paper

Calibrated CO2-laser power calorimeter
Author(s): Wilfried Plass; Andreas Voss; N. Schmid; Adolf Giesen
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Paper 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.

Paper Details

Date Published: 20 November 1996
PDF: 6 pages
Proc. SPIE 2870, Third International Workshop on Laser Beam and Optics Characterization, (20 November 1996); doi: 10.1117/12.259911
Show Author Affiliations
Wilfried Plass, Institut fuer Strahlwerkzeuge/Univ. Stuttgart (Germany)
Andreas Voss, Institut fuer Strahlwerkzeuge/Univ. Stuttgart (Germany)
N. Schmid, Institut fuer Strahlwerkzeuge/Univ. Stuttgart (Germany)
Adolf Giesen, Institut fuer Strahlwerkzeuge/Univ. Stuttgart (Germany)

Published in SPIE Proceedings Vol. 2870:
Third International Workshop on Laser Beam and Optics Characterization
Michel Morin; Adolf Giesen, Editor(s)

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