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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 34 — Dec. 1, 2012
  • pp: 8190–8194

Atmospheric transfer of a radio-frequency clock signal with a diode laser

Jinsong Nie, Lin Yang, and Lingze Duan  »View Author Affiliations

Applied Optics, Vol. 51, Issue 34, pp. 8190-8194 (2012)

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Remote transfer of a radio-frequency clock signal over a 60 m open atmospheric link has been experimentally investigated using a diode laser as the clock carrier. Phase-noise spectra and Allan deviations are both measured to characterize the excess clock instability incurred during the transfer process. Different detection schemes are used to assess the contributions from different noise sources. With an 80 MHz clock frequency, the total root-mean-square noise amplitude is measured to be about 5×103rad, with fractional frequency instability on the order of 1×1010 at 1 s. The majority of this excess noise is attributed to the transmitter noise, with the amplitude fluctuations of the diode laser identified as the main source. The excess phase noise caused by air turbulence is at the level of 104rad under the current experimental conditions. Our finding suggests that suppressing the transmitter noise is critical for improving the clock-transfer fidelity.

© 2012 Optical Society of America

OCIS Codes
(010.3310) Atmospheric and oceanic optics : Laser beam transmission
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(140.2020) Lasers and laser optics : Diode lasers

ToC Category:
Atmospheric and Oceanic Optics

Original Manuscript: July 30, 2012
Revised Manuscript: October 22, 2012
Manuscript Accepted: October 29, 2012
Published: November 30, 2012

Jinsong Nie, Lin Yang, and Lingze Duan, "Atmospheric transfer of a radio-frequency clock signal with a diode laser," Appl. Opt. 51, 8190-8194 (2012)

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