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Use of radiation pressure for measurement of high-power laser emission



Paul A. Williams, Joshua A. Hadler, Robert Lee, Frank Maring, John H. Lehman


We demonstrate a paradigm in absolute laser radiometry where a laser beam's power can be measured from its radiation pressure. Using an off-the-shelf high-accuracy mass scale and a 500 W Yb-doped fiber laser and a 92 kW CO2 laser, we show preliminary results of absolute optical power measurements with an accuracy of at least 7 %. We find a negligible contribution from radiometric forces. We also identify this scale's dynamic force noise floor (for a 0.1 Hz modulation frequency) as 4uN/Hz^1/2, or as optical power sensitivity, 600 W/Hz^1/2.
Optics Letters


Radiation pressure, radiometry, laser power


Williams, P. , Hadler, J. , Lee, R. , Maring, F. and Lehman, J. (2013), Use of radiation pressure for measurement of high-power laser emission, Optics Letters, [online], (Accessed April 14, 2024)
Created October 15, 2013, Updated April 7, 2017