Applied Physics B

, Volume 72, Issue 2, pp 221-226

Absolute frequency measurement of the iodine-stabilized He-Ne laser at 633 nm

  • T.H. YoonAffiliated withJILA, University of Colorado and National Institute of Standards and Technology, Boulder, CO 80309-0440, USA
  • , J. YeAffiliated withJILA, University of Colorado and National Institute of Standards and Technology, Boulder, CO 80309-0440, USA
  • , J.L. HallAffiliated withJILA, University of Colorado and National Institute of Standards and Technology, Boulder, CO 80309-0440, USA
  • , J.-M. ChartierAffiliated withBureau International des Poids et Mesures, Pavillon de Breteuil, 92312 Sèvres Cedex, France

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Abstract.

The absolute frequency of an iodine-stabilized He-Ne laser at 633 nm stabilized on the i (or a13) component of the 11-5 R(127) hyperfine transition of the 127I2 molecule is measured using a femtosecond optical comb generator and an iodine-stabilized Nd:YAG laser standard at 1064 nm. We link the measured absolute frequency to the current internationally adopted value via frequency intercomparison between JILA and the Bureau International des Poids et Mesures (BIPM), leading to the determination of the absolute frequency of the BIPM-4 standard laser. The resulting absolute frequency fi(BIPM) of the BIPM-4 standard laser is fi(BIPM)=473612214711.9±2.0 kHz, which is 6.9 kHz higher than the value adopted by the Comité International des Poids et Mesures (CIPM) in 1997.

PACS: 06.20.-f; 06.20.Fn; 06.30.Bp