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Simplified kilogram traceability for high-power laser measurement using photon momentum radiometers
Applied Optics
|October 26, 2020
Summary
Implementing a robotic mass delivery system improves low-noise calibration for photon momentum radiometers. This enhances traceability of optical power measurements to the International System of Units.
Area of Science:
- Metrology
- Optical Physics
- Mechanical Engineering
Background:
- Photon momentum radiometers measure laser power via optical force.
- Accurate calibration requires precise force sensing with microgram masses.
- Traceability to SI units is challenging at these mass levels due to calibration difficulties.
Purpose of the Study:
- To improve the calibration capability for photon momentum radiometers.
- To address the difficulties in low-noise calibration at milligram and microgram mass levels.
- To quantify improvements in force measurement nuances for laser power metrology.
Main Methods:
- Implementation of a robotic mass delivery system for calibration.
- Utilizing milligram and microgram mass artifacts for force sensor calibration.
- Detailed quantification of force measurement characteristics specific to laser power metrology.
Main Results:
- Demonstrated improvement in calibration capability for photon momentum radiometers.
- Enhanced precision in low-noise calibration at microgram mass levels.
- Quantified impact of the robotic system on force measurement accuracy.
Conclusions:
- Robotic mass delivery significantly enhances the calibration of photon momentum radiometers.
- Improved calibration provides better traceability of optical power measurements to the SI.
- The study quantifies the benefits for precise laser power metrology.
