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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and O. Gerstel
  • Vol. 5, Iss. 12 — Dec. 1, 2013
  • pp: 1425–1430

Real-Time Monitoring in Passive Optical Networks Using a Superluminescent LED With Uniform and Phase-Shifted Fiber Bragg Gratings

Nani Fadzlina Naim, Mohammad Syuhaimi Ab-Rahman, Hesham A. Bakarman, and A. Ashrif A. Bakar  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 5, Issue 12, pp. 1425-1430 (2013)
http://dx.doi.org/10.1364/JOCN.5.001425


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Abstract

This paper presents a monitoring system for tree-structured passive optical access networks. The emitted light of a superluminescent LED is utilized as the monitoring source. The light signal that propagates along the fiber to the customer site is then reflected by a uniform or phase-shifted fiber Bragg grating (FBG), which is employed near the end of the customer site. The wavelength optimization concept was demonstrated, where one center wavelength or Bragg wavelength is shared by two types of monitoring FBGs. Each FBG represents the distinct location of the optical network unit (ONU) to be monitored. This technique improves the number of monitored ONUs twofold, since a single Bragg wavelength can be utilized to monitor two independent customers. The results were analyzed using a digital signal processing board that displays the reflection spectra of the FBGs. After identifying the faulty branch, an optical time domain reflectometer can be activated for fault localization. The system is capable of monitoring up to 128 customers while maintaining the bit error rate at 109. This real-time, centralized monitoring system demonstrates a low-power and cost efficient monitoring system with low bandwidth requirements.

© 2013 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings
(060.4261) Fiber optics and optical communications : Networks, protection and restoration

ToC Category:
Research Papers

History
Original Manuscript: May 8, 2013
Revised Manuscript: October 1, 2013
Manuscript Accepted: October 18, 2013
Published: November 27, 2013

Citation
Nani Fadzlina Naim, Mohammad Syuhaimi Ab-Rahman, Hesham A. Bakarman, and A. Ashrif A. Bakar, "Real-Time Monitoring in Passive Optical Networks Using a Superluminescent LED With Uniform and Phase-Shifted Fiber Bragg Gratings," J. Opt. Commun. Netw. 5, 1425-1430 (2013)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-5-12-1425


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