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Optical Engineering • Open Access

Real-time monitoring and fault locating using amplified spontaneous emission noise reflection for tree-structured Ethernet passive optical networks
Author(s): Nani F. Naim; Mohammad Syuhaimi Ab-Rahman; Nur H. Kamaruddin; Ahmad A. Bakar

Paper Abstract

Nowadays, optical networks are becoming dense while detecting faulty branches in the tree-structured networks has become problematic. Conventional methods are inconvenient as they require an engineer to visit the failure site to check the optical fiber using an optical time-domain reflectometer. An innovative monitoring technique for tree-structured network topology in Ethernet passive optical networks (EPONs) by using the erbium-doped fiber amplifier to amplify the traffic signal is demonstrated, and in the meantime, a residual amplified spontaneous emission spectrum is used as the input signal to monitor the optical cable from the central office. Fiber Bragg gratings with distinct center wavelengths are employed to reflect the monitoring signals. Faulty branches of the tree-structured EPONs can be identified using a simple and low-cost receiver. We will show that this technique is capable of providing monitoring range up to 32 optical network units using a power meter with a sensitivity of −65  dBm while maintaining the bit error rate of 10 −13 .

Paper Details

Date Published: 25 September 2013
PDF: 7 pages
Opt. Eng. 52(9) 096112 doi: 10.1117/1.OE.52.9.096112
Published in: Optical Engineering Volume 52, Issue 9
Show Author Affiliations
Nani F. Naim, Univ. Kebangsaan Malaysia (Malaysia)
Mohammad Syuhaimi Ab-Rahman, Univ. Kebangsaan Malaysia (Malaysia)
Nur H. Kamaruddin, Univ. Kebangsaan Malaysia (Malaysia)
Ahmad A. Bakar, Univ. Kebangsaan Malaysia (Malaysia)

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