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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editor: Richard A. Linke
  • Vol. 3, Iss. 8 — Aug. 1, 2004
  • pp: 589–600

Signed online chromatic-dispersion monitoring by synchronous detection of FM-induced arrival-time modulations in the clock-recovery phase-locked loop

Reinhold Noé, David Sandel, Suhas Bhandare, Frank Wüst, Biljana Milivojevic, and Vitali Mirvoda  »View Author Affiliations


Journal of Optical Networking, Vol. 3, Issue 8, pp. 589-600 (2004)
http://dx.doi.org/10.1364/JON.3.000589


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Abstract

Feature Issue on Optical Performance Monitoring (OPM)

Chromatic dispersion (CD) in optical single-mode fibers, i.e., the wavelength dependence of the propagation delay, distorts pulses and is a big problem in 10- and 40-Gbit/s transmission systems. Adjustable drop-in CD compensators require an online CD detection. For this purpose, we modulate the optical power of the laser in a 40-Gbit/s transmitter by 1.2% (rms) at a frequency of 5 MHz. In the presence of CD, the associated periodic optical frequency variation modulates the signal arrival time, which is measured by synchronous (lock-in) detection of an error signal in the clock recovery of the receiver. CD as large as -268 to +350 ps/nm is detected including its sign, more than by any comparable technique. The uncertainty of measured arrival-time modulations can be as low as 100 attoseconds. Moreover, no extra optics or high-frequency electronics are needed, which makes this method extremely cheap to implement. Results are given for nonreturn to zero and carrier-suppressed return to zero (CSRZ), intensity modulation, and differential phase-shift keying.

© 2003 Optical Society of America

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.4510) Fiber optics and optical communications : Optical communications

ToC Category:
Optical Performance Monitoring

History
Original Manuscript: October 28, 2003
Revised Manuscript: October 28, 2003
Published: July 8, 2004

Virtual Issues
Optical Performance Monitoring (2004) Journal of Optical Networking

Citation
Reinhold Noé, David Sandel, Suhas Bhandare, Frank Wüst, Biljana Milivojevic, and Vitali Mirvoda, "Signed online chromatic-dispersion monitoring by synchronous detection of FM-induced arrival-time modulations in the clock-recovery phase-locked loop," J. Opt. Netw. 3, 589-600 (2004)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jon-3-8-589

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