Dynamics of bad-cavity-enhanced interaction with cold Sr atoms for laser stabilization

S. A. Schäffer, B. T. R. Christensen, M. R. Henriksen, and J. W. Thomsen
Phys. Rev. A 96, 013847 – Published 24 July 2017

Abstract

Hybrid systems of cold atoms and optical cavities are promising systems for increasing the stability of laser oscillators used in quantum metrology and atomic clocks. In this paper we map out the atom-cavity dynamics in such a system and demonstrate limitations as well as robustness of the approach. We investigate the phase response of an ensemble of cold Sr88 atoms inside an optical cavity for use as an error signal in laser frequency stabilization. With this system we realize a regime where the high atomic phase shift limits the dynamical locking range. The limitation is caused by the cavity transfer function relating input field to output field. The cavity dynamics is shown to have only little influence on the prospects for laser stabilization, making the system robust towards cavity fluctuations and ideal for the improvement of future narrow linewidth lasers.

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  • Received 22 April 2017

DOI:https://doi.org/10.1103/PhysRevA.96.013847

©2017 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

S. A. Schäffer*, B. T. R. Christensen, M. R. Henriksen, and J. W. Thomsen

  • Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, 2100 Copenhagen, Denmark

  • *schaffer@nbi.dk
  • Also at SPOC, Technical University of Denmark, DTU Fotonik, Ørsteds Plads, building 343, 2800 Kgs. Lyngby, Denmark.

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Vol. 96, Iss. 1 — July 2017

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