Spidell, M.
, Lehman, J.
, Kueck, S.
, Lopez, M.
, Lecher, H.
, Savage, R.
and Bhattacharjee, D.
(2021),
A Bilateral Comparison of NIST And PTB Laser Power Standards for Scale Realization Confidence by Gravitational Wave Observatories, Metrologia, [online], https://doi.org/10.1088/1681-7575/ac1e03, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=932473
(Accessed November 3, 2025)
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
A Bilateral Comparison of NIST And PTB Laser Power Standards for Scale Realization Confidence by Gravitational Wave Observatories
Published
Author(s)
, , Stefan Kueck, Marco Lopez, Holger Lecher, Richard Savage, Dripta Bhattacharjee
Abstract
The Gravitational Wave (GW) observatories calibrate interferometer displacement using photon momentum, with laser power serving as the measurand. These observatories are traceable to the International System of Units through a primary standard maintained by the United States' National Metrology Institute. The bilateral Degree of Equivalence for various NMIs indicated in the EUROMET.PR-S2 supplementary comparison reveals scale realization uncertainty unacceptably large for GW event parameterization. Using an improved transfer standard in a bilateral comparison, with LIGO representatives receiving results prior to their comparison, NIST and PTB demonstrated a composite Degree of Equivalence of -0.15 % with an uncertainty of 0.95 % (k=2).Citation
Metrologia
Volume
58
Issue
5
Pub Type
Journals
Download Paper
Keywords
Laser Power, LIGO, Bilateral Comparison
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact [email protected].
Created September 13, 2021, Updated September 22, 2025