I2-stabilized 633-nm He-Ne lasers: 25 years of international comparisons

Jean-Marie Chartier; Anick Chartier

doi:10.1117/12.424462

3 May 2001 I₂-stabilized 633-nm He-Ne lasers: 25 years of international comparisons

Jean-Marie Chartier, Anick Chartier

Proceedings Volume 4269, Laser Frequency Stabilization, Standards, Measurement, and Applications; (2001) https://doi.org/10.1117/12.424462
Event: Photonics West 2001 - LASE, 2001, San Jose, CA, United States

Abstract

Following a recommendation made by the Comite International des Poids et Mesures in 1983, the 17th Conference Generale des Poids et Mesures adopted a new definition of the metre based on the speed of light and introduced the 'mise en pratique,' a set of experimental procedure giving a list of recommended wavelengths and their associated uncertainties for the practical realization of the metre. At the time the most widely used radiation in the world for over ten years was that around 633 nm using an iodine-stabilized He-Ne laser. Results covering a 25-year period of international comparisons between lasers from forty-two national metrology institutes and those of the Bureau International des Poids et Mesures are presented. The information from these comparisons was used to establish the original mise en pratique of 1983 and their subsequent revisions in 1992 and 1997 incorporating the progress and improvements in techniques made in the interim. In 1997, all these comparisons were included in a program of key comparisons which were then assimilated into a key comparison database as required by the Mutual Recognition Arrangement (MRA) signed in Paris in 1999; the ongoing key comparison is designated BIPM.L-K10. Of seventy-two measured lasers from thirty-seven countries, only eleven lasers had their frequencies outside the (sigma) uncertainty given in the mises en pratique of 1992 and 1997. At a time when promising major developments are taking place in the field of optical frequency standards, it is an appropriate moment to summarize the present status of the practical realization of the metre in the international context.

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Jean-Marie Chartier and Anick Chartier "I₂-stabilized 633-nm He-Ne lasers: 25 years of international comparisons", Proc. SPIE 4269, Laser Frequency Stabilization, Standards, Measurement, and Applications, (3 May 2001); https://doi.org/10.1117/12.424462

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