Laser frequency stabilization to a single ion

Abstract

A fundamental limit to the stability of a single-ion optical frequency standard is set by quantum noise in the measurement of the internal state of the ion. We discuss how the interrogation sequence and the processing of the atomic resonance signal can be optimized in order to obtain the highest possible stability under realistic experimental conditions. A servo algorithm is presented that stabilizes a laser frequency to the single-ion signal and that eliminates errors due to laser frequency drift. Numerical simulations of the servo characteristics are compared to experimental data from a frequency comparison of two single-ion standards based on a transition at 688 THz in 171Yb+. Experimentally, an instability sigma_y(100 s)=9*10^{-16} is obtained in the frequency difference between both standards.

15 pages, 5 figures, submitted to J. Phys. B

References in corpus (5)

• New limit on the present temporal variation of the fine structure constant
• Sub-dekahertz ultraviolet spectroscopy of 199Hg+
• Testing the stability of fundamental constants with the 199Hg+ single-ion optical clock
• Absolute frequency measurement of the 171Yb+ clock transition with a Kerr-lens mode-locked femtosecond laser
• Evaluation of the ultimate performances of a Ca+ single-ion frequency standard

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