Recent activities at BIPM in the field of stabilized lasers: radiations recommended for the definition of the metre

Author

Chartier, J.-M. ; Robertsson, L. ; Fredin-Picard, S.

Author_Institution

Bur. Int. des Poids et Mesures, Sevres, France

fYear

1990

fDate

11-14 June 1990

Firstpage

94

Lastpage

95

Abstract

The results of interconnectional comparisons of iodine-stabilized He-Ne lasers at lambda =633 nm between Bureau International des Poids et Mesures (BIPM) and 11 national laboratories are presented. The measured frequency differences were all within +or-3 parts in 10/sup 11/. Investigations concerning He-Ne lasers at lambda =612 nm using internal or external iodine cells are discussed. The frequency reproducibility is limited by, among other things the quality of the iodine cells. Therefore, the contamination of iodine cells has been studied using laser-induced fluorescence. First results obtained on the green line of He-Ne at lambda =543 nm stabilized on iodine are presented. The frequency repeatability between two such systems was (14+or-5) kHz.<>

Keywords

gas lasers; helium; iodine; laser beam applications; laser frequency stability; length measurement; neon; units (measurement); 543 nm; 612 nm; 633 nm; BIPM; He-Ne lasers; I/sub 2/ stabilised laser; contamination; external iodine cells; frequency repeatability; frequency reproducibility; green line; internal iodine cell; laser-induced fluorescence; metre; stabilized lasers; Absorption; Contamination; Extraterrestrial measurements; Fluorescence; Frequency measurement; Laboratories; Laser stability; Laser theory; Metrology; Pollution measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements, 1990. CPEM '90 Digest., Conference on

Conference_Location

Ottawa, Ontario, Canada

Type

conf

DOI

10.1109/CPEM.1990.109939

Filename

109939