title: Comparison of 127I2-stabilized frequency-doubled Nd:YAG lasers at the Bureau International des Poids et Mesures.
abstract: A frequency comparison was carried out between iodine-stabilized Nd:YAG lasers at 532 nm from the Bureau International des Poids et Mesures, the Centre for Metrology and Accreditation, the Czech Metrology Institute, and the Bureau National de Métrologie-Institut National de Métrologie. The frequency differences between lasers, as well as the frequency reproducibility of each system,were investigated. Pressure-, modulation-, and power-induced shifts were studied. A frequency dispersion (1 sigma) of 3.5 kHz (6.2 x 10(-12) in relative terms) with an average reproducibility for each laser of the order of 0.4 kHz (7.1 x 10(-13) in relative terms) was observed over the duration of the comparison. Relative stabilities better than 1 x 10(13) at 1 s were demonstrated for the third-harmonic systems.
authors.affiliation: Bureau International des Poids et Mesures, Pavillon de Breteuil, 92312 Sèvres, France. spicard@bipm.org
authors.forename: Susanne
authors.initials: S
authors.lastname: Picard
authors.forename: Lennart
authors.initials: L
authors.lastname: Robertsson
authors.forename: Long-Sheng
authors.initials: LS
authors.lastname: Ma
authors.forename: Kaj
authors.initials: K
authors.lastname: Nyholm
authors.forename: Mikko
authors.initials: M
authors.lastname: Merimaa
authors.forename: Tero E
authors.initials: TE
authors.lastname: Ahola
authors.forename: Petr
authors.initials: P
authors.lastname: Balling
authors.forename: Petr
authors.initials: P
authors.lastname: Kren
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Wallerand