# Meta-study of laser power calibrations ranging 20 orders of magnitude   with traceability to the kilogram

**Authors:** Paul A. Williams, Matthew T. Spidell, Joshua A. Hadler, Thomas, Gerrits, Amanda Koepke, David Livigni, Michelle S. Stephens, Nathan A., Tomlin, Gordon A. Shaw, Jolene D. Splett, Igor Vayshenker, Malcolm G. White,, Chris Yung, John H. Lehman

arXiv: 1908.06139 · 2020-01-29

## TL;DR

This paper reviews NIST's laser power calibration methods covering 20 orders of magnitude, emphasizing traceability to the kilogram and internal verification practices for accuracy across a wide power range.

## Contribution

It provides a comprehensive meta-study of laser power calibration techniques spanning 20 orders of magnitude with traceability to the kilogram.

## Key findings

- Calibration range covers 20 orders of magnitude
- Internal comparisons ensure measurement accuracy
- Traceability to the kilogram is maintained

## Abstract

Laser power metrology at the National Institute of Standards and Technology (NIST) ranges 20 orders of magnitude from photon-counting (1000 photons/s) to 100 kW (10^23 photons/s at a wavelength of 1070 nm). As a part of routine practices, we perform internal (unpublished) comparisons between our various power meters to verify correct operation.

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Source: https://tomesphere.com/paper/1908.06139