Real-time monitoring in passive optical networks using a superluminescent LED with uniform and phase-shifted fiber Bragg gratings

Nani Fadzlina Naim, Mohd Syuhaimi Ab Rahman, Hesham A. Bakarman, Ahmad Ashrif A Bakar

Research output: Contribution to journalArticle

8 Citations (Scopus)

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 bemonitored. 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 10¿9. This real-time, centralized monitoring system demonstrates a low-power and cost efficient monitoring system with low bandwidth requirements.

Original languageEnglish
Article number6685607
Pages (from-to)1425-1430
Number of pages6
JournalJournal of Optical Communications and Networking
Volume5
Issue number12
DOIs
Publication statusPublished - Dec 2013

Fingerprint

Passive optical networks
Fiber Bragg gratings
Light emitting diodes
Monitoring
Wavelength
Reflectometers
Fiber optic networks
Digital signal processing
Bit error rate
Bandwidth
Fibers
Costs

Keywords

  • Fiber Bragg grating (FBG)
  • Monitoring
  • Passive optical access network
  • Superluminescent LED

ASJC Scopus subject areas

  • Computer Networks and Communications

Cite this

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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 bemonitored. 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 10¿9. This real-time, centralized monitoring system demonstrates a low-power and cost efficient monitoring system with low bandwidth requirements.",
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AU - A Bakar, Ahmad Ashrif

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N2 - 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 bemonitored. 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 10¿9. This real-time, centralized monitoring system demonstrates a low-power and cost efficient monitoring system with low bandwidth requirements.

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