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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 10 — May. 15, 2014
  • pp: 3054–3057

Stable fiber-optic time transfer by active radio frequency phase locking

Feifei Yin, Zhongle Wu, Yitang Dai, Tianpeng Ren, Kun Xu, Jintong Lin, and Geshi Tang  »View Author Affiliations

Optics Letters, Vol. 39, Issue 10, pp. 3054-3057 (2014)

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In this Letter we demonstrate a fiber link capable of stable time signal transfer utilizing our active long-distance radio frequency (RF) stabilization technology. Taking advantage of the chromatic dispersion in optical fiber, our scheme compensates dynamically the link delay variation by tuning the optical carrier wavelength to phase lock a round-trip RF reference. Since the time signal and the RF reference are carried by the same optical carrier, a highly stable time transfer is achieved at the same time. Experimentally, we demonstrate a stability of the time signal transfer over 50-km fiber with a time deviation of 40 ps at 1-s average and 2.3 ps at 1000-s average. The performance of the RF reference delivery is also tested, with an Allan deviation of 2×1015 at 1000-s average. According to our proposal, a simultaneous stable time and frequency transfer is expected.

© 2014 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
(060.5625) Fiber optics and optical communications : Radio frequency photonics

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: January 7, 2014
Revised Manuscript: April 8, 2014
Manuscript Accepted: April 9, 2014
Published: May 15, 2014

Feifei Yin, Zhongle Wu, Yitang Dai, Tianpeng Ren, Kun Xu, Jintong Lin, and Geshi Tang, "Stable fiber-optic time transfer by active radio frequency phase locking," Opt. Lett. 39, 3054-3057 (2014)

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