The CCL-K11 ongoing key comparison. Final report for 2021

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F22%3AN0000007" target="_blank" >RIV/00177016:_____/22:N0000007 - isvavai.cz</a>

Result on the web

<a href="https://iopscience.iop.org/article/10.1088/0026-1394/59/1A/04004" target="_blank" >https://iopscience.iop.org/article/10.1088/0026-1394/59/1A/04004</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0026-1394/59/1A/04004" target="_blank" >10.1088/0026-1394/59/1A/04004</a>

Result language

angličtina

Original language name

The CCL-K11 ongoing key comparison. Final report for 2021

Original language description

Four lasers from three national metrological institutes (NMIs) were compared in the year 2021 as part of the CCL-K11 ongoing key comparison, initiated by the 13th meeting of the Comité Consultative des Longuers (CCL) in 2007. The absolute frequency of R(127) 11-5 (≈633 nm) and of R(56) 32-0 (≈532 nm) transitions of molecular iodine was measured for these lasers following the technical protocol for CCL-K11. The results of these measurements are compiled in the present report. The comparison reports, as communicated by each participant, are included in the main document. For the very first time in this key-comparison a standard working on a different operating principle is reported. CMI participated with a frequency doubled Nd:YAG laser stabilized to an iodine transition (Designation: CMI-YAG1). The technical protocol was deliberately designed to accommodate artefacts of different wavelengths in a common framework. Moreover, CMI participated with a second laser standard also. The institute has different CMC entries for the two laser types. Both entries refer to the same service category of highest metrological level, but are technically well separated. Due to the layout of CCL-K11 the KCRV is immune to a multiple participation of a single NMI. It was thus considered to include both measurements in this report. This document constitutes the 11th final report for the ongoing key comparison CCL-K11. To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/. The final report has been peer-reviewed and approved for publication by the CCL, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

—

Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Metrologia

ISSN

0026-1394

e-ISSN

—

Volume of the periodical

59

Issue of the periodical within the volume

červen

Country of publishing house

GB - UNITED KINGDOM

Number of pages

25

Pages from-to

04004

UT code for WoS article

999

EID of the result in the Scopus database

2-s2.0-85133033272