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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 17 — Sep. 1, 2014
  • pp: 5102–5105

Ultrastable laser with average fractional frequency drift rate below 5 × 10−19/s

Christian Hagemann, Christian Grebing, Christian Lisdat, Stephan Falke, Thomas Legero, Uwe Sterr, Fritz Riehle, Michael J. Martin, and Jun Ye  »View Author Affiliations


Optics Letters, Vol. 39, Issue 17, pp. 5102-5105 (2014)
http://dx.doi.org/10.1364/OL.39.005102


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Abstract

Cryogenic single-crystal optical cavities have the potential to provide high dimensional stability. We have investigated the long-term performance of an ultrastable laser system that is stabilized to a single-crystal silicon cavity operated at 124 K. Utilizing a frequency comb, the laser is compared to a hydrogen maser that is referenced to a primary caesium fountain standard and to the Sr87 optical lattice clock at Physikalisch-Technische Bundesanstalt (PTB). With fractional frequency instabilities of σy(τ)2×1016 for averaging times of τ=60s to 1000 s and σy(1d)2×1015 the stability of this laser, without any aid from an atomic reference, surpasses the best known microwave standards for short averaging times and is competitive with the best known hydrogen masers for longer times of 1 day. The comparison of modeled thermal response of the cavity with measured data indicates an average fractional frequency drift below 5×1019/s, which we do not expect to be a fundamental limit.

© 2014 Optical Society of America

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(140.4780) Lasers and laser optics : Optical resonators
(140.3425) Lasers and laser optics : Laser stabilization

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: May 6, 2014
Manuscript Accepted: June 18, 2014
Published: August 22, 2014

Citation
Christian Hagemann, Christian Grebing, Christian Lisdat, Stephan Falke, Thomas Legero, Uwe Sterr, Fritz Riehle, Michael J. Martin, and Jun Ye, "Ultrastable laser with average fractional frequency drift rate below 5 × 10−19/s," Opt. Lett. 39, 5102-5105 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-17-5102

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