Skip to main content
U.S. flag

An official website of the United States government

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.

Trilateral optical powermeter comparison between NIST, NMIJ/AIST, and METAS



Igor Vayshenker, John H. Lehman, David J. Livigni, Xiaoyu X. Li, Kuniaki Amemiya, Daiji Fukuda, Seiji Mukai, Shinji Kimura, Michiyuki Endo, Jacques Morel, Armin Gambon


We describe the results of a comparison of reference standards between three National Metrology Institutes: the National Institute of Standards and Technology (NIST, USA), the National Metrology Institute of Japan/National Institute of Advanced Industrial Science and Technology (NMIJ/AIST, Japan), and the Federal Office of Metrology (METAS, Switzerland). Open-beam- (free field) and optical-fiber-based measurements at wavelengths of 1302 and 1546 nm are reported. Three laboratories' reference standards are compared by means of two temperature-controlled, optical trap detectors. Measurement results showed largest differences of less than 4.2 parts in 103, which is within the expanded (k=2) uncertainty for the laboratories' reference standards.
Optics Letters


fiber, international comparison, optical power, reference standard


Vayshenker, I. , Lehman, J. , Livigni, D. , Li, X. , Amemiya, K. , Fukuda, D. , Mukai, S. , Kimura, S. , Endo, M. , Morel, J. and Gambon, A. (2007), Trilateral optical powermeter comparison between NIST, NMIJ/AIST, and METAS, Optics Letters, [online], (Accessed June 23, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created February 9, 2007, Updated October 12, 2021