A A Madej et al 2004 Metrologia 41 152 doi:10.1088/0026-1394/41/3/007
A A Madej1, J E Bernard1, L Robertsson2, L-S Ma2, M Zucco2 and R S Windeler3
Show affiliationsThe absolute optical frequency of a 633 nm, I2-stabilized He–Ne laser system is measured with a femtosecond laser frequency comb. Results over a three-year period using chain- and comb-based measurements yield an operating frequency of ff = (473 612 353 602 850 ± 570) Hz for the INMS 3 laser stabilized to the f or a16 component of the 11-5 R(127) transition in 127I2 at the operating conditions specified for the realization of the recommended value of this radiation. The frequency of the NRC INMS 2 laser system has recently been measured with combs at NRC and BIPM and was shown to be reproducible to better than 600 Hz (1 × 10−12) after transport. These results indicate the high level of reproducibility attainable by such widely used optical frequency standards.
42.55.Lt Gas lasers including excimer and metal-vapor lasers
42.60.Jf Beam characteristics: profile, intensity, and power; spatial pattern formation
42.65.Re Ultrafast processes; optical pulse generation and pulse compression
42.60.Lh Efficiency, stability, gain, and other operational parameters
Issue 3 (June 2004)
Received 8 December 2003
Published 7 April 2004
A A Madej et al 2004 Metrologia 41 152
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