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Simplified kilogram traceability for high-power laser measurement using photon momentum radiometers

Abstract

Photon momentum radiometers measure the force imparted by a reflected laser beam to determine the laser’s optical power. This requires high-accuracy calibration of the force sensors using milligram and microgram mass artifacts. Calibrated test masses can therefore be used to provide traceability of these radiometers to the International System of Units, but low-noise calibration at these mass levels is difficult. Here, we present the improvement in calibration capability that we have gained from implementing a robotic mass delivery system. We quantify this in terms of the specific nuances of force measurements as implemented for laser power metrology.

© 2020 Optical Society of America

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