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Optics Letters

Optics Letters


  • 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)

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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

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

Ayshah Alatawi, Ravi P. Gollapalli, and Lingze Duan, "Radio-frequency clock delivery via free-space frequency comb transmission," Opt. Lett. 34, 3346-3348 (2009)

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  1. K. W. Holman, D. D. Hudson, J. Ye, and D. J. JonesOpt. Lett. 30, 1225 (2005). [CrossRef] [PubMed]
  2. S. M. Foreman, K. W. Holman, D. D. Hudson, D. J. Jones, and J. Ye, Rev. Sci. Instrum. 78, 021101 (2007). [CrossRef] [PubMed]
  3. N. R. Newbury, P. A. Williams, and W. C. Swann, Opt. Lett. 32, 3056 (2007). [CrossRef] [PubMed]
  4. G. Grosche, O. Terra, K. Predehl, R. Holzwarth, B. Lipphardt, F. Vogt, U. Sterr, and H. Schnatz, Opt. Lett. 34, 2270 (2009). [CrossRef] [PubMed]
  5. Th. Udem, R. Holzwarth, and T. W. Hansch, Nature 416, 233 (2002). [CrossRef] [PubMed]
  6. J. Kim, J. A. Cox, J. Chen, and F. X. Kaertner, Nat. Photonics 2, 733 (2008). [CrossRef]
  7. B. Sprenger, J. Zhang, Z. H. Lu, and L. J. Wang, Opt. Lett. 34, 965 (2009). [CrossRef] [PubMed]
  8. A. Ishimaru, Wave Propagation and Scattering in Random Media (Academic, 1978).
  9. D. Halford, A. E. Wainwright, and J. A. Barnes, in 22nd Annual Symposium on Frequency Control (1968), p. 340.
  10. J. Rutman and F. Walls, Proc. IEEE 79, 952 (1991). [CrossRef]
  11. L. C. Andrews and R. L. Phillips, Laser Beam Propagation through Random Media, 2nd ed. (SPIE, 2005). [CrossRef]

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