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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 11 — Jun. 2, 2014
  • pp: 13269–13279

A superradiant clock laser on a magic wavelength optical lattice

Thomas Maier, Sebastian Kraemer, Laurin Ostermann, and Helmut Ritsch  »View Author Affiliations


Optics Express, Vol. 22, Issue 11, pp. 13269-13279 (2014)
http://dx.doi.org/10.1364/OE.22.013269


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Abstract

An ideal superradiant laser on an optical clock transition of noninteracting cold atoms is predicted to exhibit an extreme frequency stability and accuracy far below mHz-linewidth. In any concrete setup sufficiently many atoms have to be confined and pumped within a finite cavity mode volume. Using a magic wavelength lattice minimizes light shifts and allows for almost uniform coupling to the cavity mode. Nevertheless, the atoms are subject to dipole-dipole interaction and collective spontaneous decay which compromises the ultimate frequency stability. In the high density limit the Dicke superradiant linewidth enhancement will broaden the laser line and nearest neighbor couplings will induce shifts and fluctuations of the laser frequency. We estimate the magnitude and scaling of these effects by direct numerical simulations of few atom systems for different geometries and densities. For Strontium in a regularly filled magic wavelength configuration atomic interactions induce small laser frequency shifts only and collective spontaneous emission weakly broadens the laser. These interactions generally enhance the laser sensitivity to cavity length fluctuations but for optimally chosen operating conditions can lead to an improved synchronization of the atomic dipoles.

© 2014 Optical Society of America

OCIS Codes
(020.7010) Atomic and molecular physics : Laser trapping
(140.6630) Lasers and laser optics : Superradiance, superfluorescence
(270.0270) Quantum optics : Quantum optics

ToC Category:
Quantum Optics

History
Original Manuscript: February 18, 2014
Revised Manuscript: April 1, 2014
Manuscript Accepted: April 2, 2014
Published: May 27, 2014

Citation
Thomas Maier, Sebastian Kraemer, Laurin Ostermann, and Helmut Ritsch, "A superradiant clock laser on a magic wavelength optical lattice," Opt. Express 22, 13269-13279 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-11-13269


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