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arXiv · 1105.2373

Extreme non-linear response of ultra-narrow optical transitions in cavity QED for laser stabilization

M. J. Martin·D. Meiser·J. W. Thomsen·Jun Ye·M. J. Holland
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Abstract

We explore the potential of direct spectroscopy of ultra-narrow optical transitions of atoms localized in an optical cavity. In contrast to stabilization against a reference cavity, which is the approach currently used for the most highly stabilized lasers, stabilization against an atomic transition does not suffer from Brownian thermal noise. Spectroscopy of ultra-narrow optical transitions in a cavity operates in a very highly saturated regime in which non-linear effects such as bistability play an important role. From the universal behavior of the Jaynes-Cummings model with dissipation, we derive the fundamental limits for laser stabilization using direct spectroscopy of ultra-narrow atomic lines. We find that with current lattice clock experiments, laser linewidths of about 1 mHz can be achieved in principle, and the ultimate limitations of this technique are at the 1 $\mu$ Hz level.

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M. J. Martin, D. Meiser, J. W. Thomsen, Jun Ye, M. J. Holland. 2011-05-12. Extreme non-linear response of ultra-narrow optical transitions in cavity QED for laser stabilization. https://doi.org/10.1103/physreva.84.063813

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