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Progress in the evaluation and operation of the NRC strontium single ion frequency standard as an optical atomic clock

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7 Author(s)
A. A. Madej ; Frequency and Time Group, Institute for National Measurement Standards, National Research Council of Canada, Bldg. M-36, NRC, 1200 Montreal Rd. Ottawa, Ontario, K1A 0R6 Canada ; P. Dubé ; J. E. Bernard ; G. Humphrey
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Improved functionality and accuracy of the NRC Sr+ single trapped ion 445-THz standard is described. Absolute frequency stabilization of all laser sources has been achieved together with loading of the ion trap using photo-ionization methods. An Erbium fiber laser based frequency comb is used to directly measure the 445-THz clock frequency. A 9 hr preliminary measurement was performed with statistical uncertainty of 1.4 Hz (3×10-15) in excellent agreement with a previously reported value in 2005. A new endcap trap with probing and micromotion correction in three dimensions has been assembled and will have uncertainties approaching 10-17 in the near future.

Published in:

CPEM 2010

Date of Conference:

13-18 June 2010