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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 16 — Aug. 12, 2013
  • pp: 18754–18764

Stable radio-frequency transfer over optical fiber by phase-conjugate frequency mixing

Yabai He, Brian J. Orr, Kenneth G. H. Baldwin, Michael J. Wouters, Andre N. Luiten, Guido Aben, and R. Bruce Warrington  »View Author Affiliations

Optics Express, Vol. 21, Issue 16, pp. 18754-18764 (2013)

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We demonstrate long-distance (≥100-km) synchronization of the phase of a radio-frequency reference over an optical-fiber network without needing to actively stabilize the optical path length. Frequency mixing is used to achieve passive phase-conjugate cancellation of fiber-length fluctuations, ensuring that the phase difference between the reference and synchronized oscillators is independent of the link length. The fractional radio-frequency-transfer stability through a 100-km “real-world” urban optical-fiber network is 6 × 10−17 with an averaging time of 104 s. Our compensation technique is robust, providing long-term stability superior to that of a hydrogen maser. By combining our technique with the short-term stability provided by a remote, high-quality quartz oscillator, this system is potentially applicable to transcontinental optical-fiber time and frequency dissemination where the optical round-trip propagation time is significant.

© 2013 OSA

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(060.5625) Fiber optics and optical communications : Radio frequency photonics

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: May 2, 2013
Revised Manuscript: July 17, 2013
Manuscript Accepted: July 21, 2013
Published: July 30, 2013

Yabai He, Brian J. Orr, Kenneth G. H. Baldwin, Michael J. Wouters, Andre N. Luiten, Guido Aben, and R. Bruce Warrington, "Stable radio-frequency transfer over optical fiber by phase-conjugate frequency mixing," Opt. Express 21, 18754-18764 (2013)

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