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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 34, Iss. 5 — Mar. 1, 2009
  • pp: 692–694

Measuring the frequency of a Sr optical lattice clock using a 120 km coherent optical transfer

F.-L. Hong, M. Musha, M. Takamoto, H. Inaba, S. Yanagimachi, A. Takamizawa, K. Watabe, T. Ikegami, M. Imae, Y. Fujii, M. Amemiya, K. Nakagawa, K. Ueda, and H. Katori  »View Author Affiliations


Optics Letters, Vol. 34, Issue 5, pp. 692-694 (2009)
http://dx.doi.org/10.1364/OL.34.000692


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Abstract

We demonstrate a precision frequency measurement using a phase-stabilized 120 km optical fiber link over a physical distance of 50 km . The transition frequency of the Sr 87 optical lattice clock at the University of Tokyo is measured to be 429228004229874.1 ( 2.4 ) Hz referenced to international atomic time. The results demonstrate the excellent functions of the intercity optical fiber link and the great potential of optical lattice clocks for use in the redefinition of the second.

© 2009 Optical Society of America

OCIS Codes
(060.2360) Fiber optics and optical communications : Fiber optics links and subsystems
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.4800) Instrumentation, measurement, and metrology : Optical standards and testing

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: September 30, 2008
Revised Manuscript: January 26, 2009
Manuscript Accepted: January 26, 2009
Published: February 27, 2009

Citation
F.-L. Hong, M. Musha, M. Takamoto, H. Inaba, S. Yanagimachi, A. Takamizawa, K. Watabe, T. Ikegami, M. Imae, Y. Fujii, M. Amemiya, K. Nakagawa, K. Ueda, and H. Katori, "Measuring the frequency of a Sr optical lattice clock using a 120 km coherent optical transfer," Opt. Lett. 34, 692-694 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-5-692


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