Absolute-Frequency Measurement of the Iodine-Based Length Standard at 514.67 nm

نویسندگان

  • R. J. Jones
  • Wang-Yau Cheng
  • K. W. Holman
  • Lisheng Chen
  • John L. Hall
  • Jun Ye
چکیده

The absolute frequency of the length standard at 514.67 nm based on the molecular iodine ( I2) transition of the P(13) 43-0 component a3 is measured using a self-referenced femtosecond optical comb. This frequency-based technique improves measurement precision more than 100 times compared with previous wavelength-based results. Powerand pressure-related frequency shifts have been carefully studied. The measured absolute frequency is 71.8±1.5 kHz higher than the internationally accepted value of 582 490 603.37±0.15 MHz, adopted by the Comité International des Poids et Mesures (CIPM) in 1997. PACS 06.20.-f; 06.20.Fn; 06.30.Bp; 06.30.Ft

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تاریخ انتشار 2015