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Optics Letters

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  • Vol. 30, Iss. 13 — Jul. 1, 2005
  • pp: 1662–1664

Common-mode-free frequency comparison of lasers with relative frequency stability at the millihertz level

M. Eichenseer, J. von Zanthier, and H. Walther  »View Author Affiliations


Optics Letters, Vol. 30, Issue 13, pp. 1662-1664 (2005)
http://dx.doi.org/10.1364/OL.30.001662


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Abstract

We report on a frequency comparison of frequency-stabilized lasers located in remote laboratories resting on different foundations. By locating the lasers in this way correlated frequency excursions of the lasers are suppressed to a high degree. The beat signal between them shows a linewidth at the hertz level for averaging times of 1 s. The optical link is established by a 100 m single-mode optical fiber where the frequency noise induced by the fiber is reduced to the level of a few tens of millihertz. One laser is stabilized onto a Fabry-Perot resonator with a long-term precision of 25 mHz (fractional frequency instability, sigma_y = 1.2×10^-16), the highest lock fidelity obtained so far to our knowledge.

© 2005 Optical Society of America

OCIS Codes
(140.3530) Lasers and laser optics : Lasers, neodymium

Citation
M. Eichenseer, J. von Zanthier, and H. Walther, "Common-mode-free frequency comparison of lasers with relative frequency stability at the millihertz level," Opt. Lett. 30, 1662-1664 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-13-1662


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