Comparison of 127I2-stabilized frequency-doubled Nd:YAG lasers at the Bureau International des Poids et Mesures.
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.
Picard
Susanne
S
Bureau International des Poids et Mesures, Pavillon de Breteuil, 92312 Sèvres, France. spicard@bipm.org
Robertsson
Lennart
L
Ma
Long-Sheng
LS
Nyholm
Kaj
K
Merimaa
Mikko
M
Ahola
Tero E
TE
Balling
Petr
P
Kren
Petr
P
Wallerand
Jean-Pierre
JP