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