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BIPM.L-K11
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BIPM.L-K11
Information
Metrology area, branch   Length, Laser Frequencies
Description   Comparison of primary wavelength standards
Time of measurement   2004 - 2006
Status   Approved for equivalence, Results available
Reference(s)   Metrologia, 2005, 42, Tech. Suppl., 04002
Metrologia, 2005, 42, Tech. Suppl., 04003
Metrologia, 2005, 42, Tech. Suppl., 04004
Metrologia, 2007, 44, Tech. Suppl., 04002
Metrologia, 2007, 44, Tech. Suppl., 04003
Metrologia, 2007, 44, Tech. Suppl., 04004
Measurand   Absolute frequency of the reference component of the corresponding recommended radiation for the practical realization of the definition of the metre
Wavelengths: 633 nm and 543 nm
Transfer device(s)   -
Comparison type   Key comparison
Consultative Committee  CCL (Consultative Committee for Length)
Conducted by   BIPM (Bureau International des Poids et Mesures)
Comments  

This comparison has been classified as superseded by the CCL and was placed in the KCDB archives on 6 January 2016.

Measurements in key comparison BIPM.L-K11 are organised as campaigns that take place at the BIPM twice a year, respectively designated as "CI-20xy" and "CII-20xy" for year 20xy:

CI-2004 status: Approved by the CCL
CII-2004 status: Approved by the CCL
CI-2005 status: Approved by the CCL
CII-2005 status: Approved by the CCL
CI-2006 status: Approved by the CCL
CII-2006 status: Approved by the CCL

Three other measurements took place at the BIPM (Standard NIM/L2 at 543 nm) in November 2005, at NMIJ (Standard NRLM-03 at 633 nm) in November 2004, and at UME (Standard UME-L3 at 633 nm) in June 2005. They are referred to as "Additional measurements" in the following.
In addition, a number of measurements have been taken in the framework of key comparison APMP.L-K11 held in NIM, China, in 2004.