DESCRIPTION : comparison of the frequencies of He-Ne lasers at 633 nm
MEASURAND: frequency difference
No graphs of equivalence are given here.
DESCRIPTION : comparison of the frequencies of He-Ne lasers at 633 nm
MEASURAND: frequency difference
No degrees of equivalence are given here.
| Metrology area, Sub-field | Length, Laser Frequencies |
| Description | Comparison of the frequencies of Helium-Neon lasers at wavelength 633 nm |
| Time of measurements | 1988 - 2000 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Frequency |
| Transfer device | Portable iodine-stabilized lasers |
| 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| Comments | This comparison has been classified as superseded by the CCL and was placed in the KCDB archives on 6 January 2016. Interpretation in terms of equivalence published in December 2002 BIPM key comparison of Helium-Neon lasers at 633 nm interpretation in terms of equivalence. |
| Pilot institute |
BIPM
Bureau International des Poids et Mesures BIPM - International Organization |
| Contact person | J.-M. Chartier +33 (0) 1 45 07 70 51 |
| Pilot laboratory | |
|---|---|
| BIPM |
Bureau International des Poids et Mesures, BIPM - International Organization, N/A |
| ASMW |
Amt für Standardisierung, Messwesen und Warenprüfung, Germany, EURAMET |
| 1988 |
| BEV |
Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET |
| 1999 |
| BNM-INM |
Bureau National de Métrologie - Institut National de Métrologie, France, EURAMET |
| 1988 | |
| 1992 | |
| 1995 | |
| 1995 |
| CEM |
Centro Español de Metrologia, Spain, EURAMET |
| 1994 | |
| 1995 | |
| 1995 |
| CENAM |
Centro Nacional de Metrologia, Mexico, SIM |
| 1997 | |
| 2000 |
| CMA |
Centre for Metrology and Accreditation, Finland, EURAMET |
| 1993 | |
| 1993 |
| CMI |
Czech Metrology Institute, Czechia, EURAMET |
| 1994 | |
| 1994 | |
| 1998 | |
| 1999 |
| CNR-IMGC |
Consiglio Nazionale delle Ricerche - Istituto di Metrologia G. Colonnetti (until 2006), Italy, EURAMET |
| 1995 | |
| 1995 |
| CSAV |
Czechoslovak Academy of Sciences, Czechia, EURAMET |
| 1988 |
| CSIR-NML |
Council for Scientific and Industrial Research, National Metrology Laboratory (became NMISA in 2007), South Africa, AFRIMETS |
| 1991 | |
| 1995 | |
| 1995 |
| CSIRO-NML |
Commonwealth Scientific and Industrial Research Organization - National Measurement Laboratory; became National Measurement Institute, Australia, NMIA in 2004, Australia, APMP |
| 1995 | |
| 1995 |
| CSMU |
Ceskoslovensky Metrologicky Ustav, Czechia, EURAMET |
| 1988 |
| DFM |
Danish Fundamental Metrology A/S, Denmark, EURAMET |
| 1991 | |
| 1993 | |
| 1993 |
| ETCA |
Etablissement Technique Central de l'Armement, France, EURAMET |
| 1988 |
| GUM |
Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET |
| 1994 | |
| 1994 | |
| 1999 |
| HUT |
Helsinki University of Technology, Finland, EURAMET |
| 1991 | |
| 1993 | |
| 1993 |
| IAP |
Institute of Atomic Physics, Romania, EURAMET |
| 1993 | |
| 1993 | |
| 1995 |
| IGM |
Inspection Générale de la Métrologie, Belgium, EURAMET |
| 1991 | |
| 1995 | |
| 1995 |
| INMETRO |
Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM |
| 2000 |
| INTI |
Instituto Nacional de Tecnologia Industrial, Argentina, SIM |
| 2000 |
| IPQ |
Instituto Portugues da Qualidade, Portugal, EURAMET |
| 1993 | |
| 1994 |
| ISI |
Institute of Scientific Instruments, Czechia, EURAMET |
| 1994 | |
| 1994 |
| JV |
Justervesenet, Norway, EURAMET |
| 1995 | |
| 1995 |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| 1991 | |
| 1995 | |
| 1995 | |
| 1997 |
| METAS |
Federal Institute of Metrology, Switzerland, EURAMET |
| 1991 | |
| 1995 | |
| 1995 |
| MIKES |
VTT Technical Research Centre of Finland Ltd, Centre for Metrology/Mittatekniikan keskus, Finland, EURAMET |
| 1997 | |
| 1998 |
| MSL |
Measurement Standards Laboratory, New Zealand, APMP |
| 1995 | |
| 1995 |
| NCM |
National Centre of Metrology, now BIM (Bulgarian Institute of Metrology), Bulgaria, EURAMET |
| 1995 | |
| 1995 |
| NILPRP |
National Institute for Laser, Plasma and Radiation Physics, Romania, EURAMET |
| 1995 | |
| 1995 | |
| 1999 |
| NIM |
National Institute of Metrology, China, APMP |
| 1997 | |
| 1998 |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| 1993 | |
| 1993 | |
| 1997 | |
| 1998 |
|
| NIST/JILA |
NIST/Joint Institute for Laboratory Astrophysics, United States, SIM |
| 1994 | |
| 1994 | |
| 1997 | |
| 1998 |
|
| 2000 |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| 1988 | |
| 1997 |
| NMi-VSL |
Nederlands Meetinstituut - Van Swinden Laboratorium (became VSL in 2009), Netherlands, EURAMET |
| 1995 | |
| 1995 |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| 1995 | |
| 1995 |
| NRC |
National Research Council, Canada, SIM |
| 1993 | |
| 1993 | |
| 1997 | |
| 2000 | |
| 2000 |
| OMH |
Országos Mérésügyi Hivatal; Subsequently MKEH, now BKFH, Hungary, EURAMET |
| 1988 | |
| 1994 | |
| 1994 | |
| 1999 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 1991 | |
| 1995 | |
| 1995 | |
| 2000 |
|
| SMU |
Slovensky Metrologicky Ustav, Slovakia, EURAMET |
| 1994 | |
| 1994 |
| SP |
Technical Research Institute of Sweden from 2017 Research Institutes of Sweden AB, Sweden, EURAMET |
| 1990 | |
| 1991 | |
| 1993 | |
| 1993 |
| SPRING Singapore |
Singapore Standards, Productivity and Innovation Board (became NMC, A*STAR in 2008), Singapore, APMP |
| 1995 | |
| 1995 |
| UME |
TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET |
| 1994 |
| VNIIFTRI |
Institute of Physical Technical and Radiotechnical Measurements, Rosstandart, Russian Federation, COOMET |
| 1999 |
|
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
| 1988 | |
| 1995 | |
| 1995 | |
| 1998 | |
| 1999 |
|
| ZMDM |
Bureau of Measures and Precious Metals (became DMDM), Serbia, EURAMET |
| 1990 |
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Please, select items to be printed out, then click on "OK" :
DESCRIPTION : comparison of the frequencies of He-Ne lasers at 633 nm
MEASURAND: frequency difference
| Key comparison reference value: The key comparison reference value is the frequency of the BIPM laser BIPM4. Its combined standard uncertainty is equal to the value 12 kHz as estimated by the CCL in 1997. |
| It follows that measurement results may be interpreted as degrees of equivalence relative to the reference value for each laser if the Type B uncertainty is not taken into account. |
| At its 10th meeting in September 2001, the CCL decided that no pair-wise degrees of equivalence would be computed for this comparison. |
DESCRIPTION : comparison of the frequencies of He-Ne lasers at 633 nm
MEASURAND: frequency difference
No numerical values are displayed here; they may be found in the references proposed in the page Participants.
The result of measurement for laser i is expressed as the difference from the BIPM4 laser frequency: fLASER i - fBIPM4.
Its standard uncertainty is the Type A standard deviation of the measurements.
