OSA's Digital Library

Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editor: Richard A. Linke
  • Vol. 3, Iss. 6 — Jun. 1, 2004
  • pp: 396–409

Optical performance monitoring using narrowband radio-frequency analysis at the half-clock frequency

Howard Stuart  »View Author Affiliations


Journal of Optical Networking, Vol. 3, Issue 6, pp. 396-409 (2004)
http://dx.doi.org/10.1364/JON.3.000396


View Full Text Article

Acrobat PDF (818 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

Feature Issue on Optical Performance Monitoring (OPM)

A new technique for monitoring the signal-to-noise ratio (SNR) of a randomly modulated optical data signal is proposed and demonstrated. The signal is detected and then subjected to a narrowband rf demodulation at precisely half the data clock frequency. Because of symmetries present in the modulation spectrum at the half-clock frequency, the demodulated signal is confined to a single dimension in the recovered phase space. In contrast, the noise power is distributed isotropically within the phase space, and the SNR is measured by taking the ratio of the power recovered along the signal dimension to the power recovered along the orthogonal dimension. The narrowband nature of the measurement makes it highly sensitive. The technique is demonstrated for return-to-zero modulated data at 10 Gbits/s, where it accurately tracks OSNR variations from 10 to 26 dB with only -24 dBm of optical input. The measurement is also shown to be sensitive to chromatic dispersion and can be made to track OSNR variations in the presence of large amounts of chromatic dispersion with vestigial sideband optical filtering. These properties make this technique an ideal candidate for optical performance monitoring in transparent optical networks, where a sensitive, low-cost monitoring solution is needed for effective fault localization.

© 2003 Optical Society of America

OCIS Codes
(060.2360) Fiber optics and optical communications : Fiber optics links and subsystems
(060.4510) Fiber optics and optical communications : Optical communications

ToC Category:
Optical Performance Monitoring

History
Original Manuscript: November 3, 2003
Revised Manuscript: November 3, 2003
Published: May 18, 2004

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

Citation
Howard Stuart, "Optical performance monitoring using narrowband radio-frequency analysis at the half-clock frequency," J. Opt. Netw. 3, 396-409 (2004)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jon-3-6-396

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited