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Simplified kilogram traceability for photon momentum radiometers



Kyle A. Rogers, Paul A. Williams, Gordon A. Shaw, John H. Lehman


High power laser applications in areas such as laser processing of materials can require an accurately measured laser power. Radiation pressure-based laser power measurement has been proven as a practical method for quantifying these high-power levels in the continuous wave (CW) regime. We are developing and demonstrating Photon Momentum Radiometers (PMRs) for use over a range of power levels and operating environments. Calibrated test masses provide an accurate reference traceable to the International System of Units (SI) for the measurements used in these radiometers. We present a means of calibrating PMRs using microgram to milligram mass artifacts. The calibration procedure described herein has been optimized for automated operation with a robotic mass delivery system.
Applied Optics


radiation pressure, mass, metrology, calibration, automation, radiometer, photon momentum


Rogers, K. , Williams, P. , Shaw, G. and Lehman, J. (2020), Simplified kilogram traceability for photon momentum radiometers, Applied Optics, [online], (Accessed June 23, 2024)


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Created September 30, 2020, Updated September 29, 2020