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Optics Letters

Optics Letters


  • Vol. 19, Iss. 21 — Nov. 1, 1994
  • pp: 1777–1779

Delivering the same optical frequency at two places: accurate cancellation of phase noise introduced by an optical fiber or other time-varying path

Long-Sheng Ma, Peter Jungner, Jun Ye, and John L. Hall  »View Author Affiliations

Optics Letters, Vol. 19, Issue 21, pp. 1777-1779 (1994)

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Although a single-mode optical fiber is a convenient and efficient interface/connecting medium, it introduces phase-noise modulation, which corrupts high-precision frequency-based applications by broadening the spectrum toward the kilohertz domain. We describe a simple double-pass fiber noise measurement and control system, which is demonstrated to provide millihertz accuracy of noise cancellation.

© 1994 Optical Society of America

Original Manuscript: May 12, 1994
Published: November 1, 1994

Long-Sheng Ma, Peter Jungner, Jun Ye, and John L. Hall, "Delivering the same optical frequency at two places: accurate cancellation of phase noise introduced by an optical fiber or other time-varying path," Opt. Lett. 19, 1777-1779 (1994)

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  1. See, for example,Y. C. Chung, eds., Frequency- Stabilized Lasers and Their Applications, Proc. Soc. Photo-Opt. Instrum. Eng.1837 (1993).
  2. Y. Pang, J. J. Hamilton, J. P. Richard, Appl. Opt. 31, 7532 (1992). [CrossRef] [PubMed]
  3. R. F. C. Vessot, M. W. Levine, E. M. Mattison, E. L. Blomberg, T. E. Hoffman, R. Decher, P. B. Ely, C. R. Baugher, J. W. Watts, D. L. Teuber, F. D. Wills, Phys. Rev. Lett. 45, 2081 (1980). [CrossRef]
  4. J. C. Bergquist, W. M. Itano, D. J. Wineland, in International School of Physics “Enrico Fermi”1992, T. W. Hdnsch, M. Inguscio, eds. (North-Holland, Amsterdam, to be published).
  5. A related technique measures and stabilizes the phase of an rf modulation carried by the fiber as an AM signal. This system permits precise time and rf frequency transfer via fiber. SeeT. P. Krisher, L. Maleki, G. Lutes, L. E. Primas, R. T. Logan, J. D. Anderson, C. M. Will, Phys. Rev. D 42, 731 (1990). [CrossRef]
  6. J. H. Shirley, Opt. Lett. 7, 537 (1982); L.-S. Ma, L. Hollberg, J. H. Shirley, J. L. Hall, U.S. patent4,590,597 (May20, 1986). [CrossRef] [PubMed]
  7. Tests of the phase-lock null point showed a maximum residual phase-noise density of ~2×10-5 rad/Hz at ~10 kHz, reducing at higher frequencies as a result of reduced phase noise from the fiber, and reducing also toward low frequencies because of the higher gain of the second-order phase-lock loop.
  8. For the best resolution it is necessary to run both rf synthesizers from the same reference for these tests, but we emphasize that, in practice, only a single crystal oscillator is needed for the AOM1 source.
  9. Approximately 0.2-μbar/Hz of pressure below 300 Hz was produced by a small heat gun (turned on cold) located 50 cm from the fiber and blowing away from it.

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