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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 34, Iss. 21 — Nov. 1, 2009
  • pp: 3346–3348

Radio-frequency clock delivery via free-space frequency comb transmission

Ayshah Alatawi, Ravi P. Gollapalli, and Lingze Duan  »View Author Affiliations


Optics Letters, Vol. 34, Issue 21, pp. 3346-3348 (2009)
http://dx.doi.org/10.1364/OL.34.003346


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Abstract

We characterize the instability of an rf clock signal caused by free-space transmission of a frequency comb (FC) under typical laboratory conditions. The phase-noise spectra show the involvement of multiple random processes. For a 10 m transmission, the rms timing jitter integrated over 1 10 5 Hz is 95 fs , and the root Allan variance over 1 s is 4 × 10 13 . The measured Allan variance has a τ 1 behavior and an excellent agreement with the phase noise measurement. These results indicate the feasibility of FC-based free-space rf clock distribution over short distances.

© 2009 Optical Society of America

OCIS Codes
(010.3310) Atmospheric and oceanic optics : Laser beam transmission
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(060.2605) Fiber optics and optical communications : Free-space optical communication

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: August 11, 2009
Revised Manuscript: September 29, 2009
Manuscript Accepted: October 2, 2009
Published: October 27, 2009

Citation
Ayshah Alatawi, Ravi P. Gollapalli, and Lingze Duan, "Radio-frequency clock delivery via free-space frequency comb transmission," Opt. Lett. 34, 3346-3348 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-21-3346

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