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Experimental Verification of Passive Optical Network With Ring Topology
Author(s) -
Lafata Pavel,
Vodrážka Jiří
Publication year - 2013
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.27783
Subject(s) - network topology , topology (electrical circuits) , ring (chemistry) , ring network , engineering , unit (ring theory) , microwave , electronic engineering , computer science , electrical engineering , telecommunications , mathematics , computer network , chemistry , mathematics education , organic chemistry
Today, tree or hybrid tree‐star topologies are mostly used for passive optical networks in practice. However, these topologies are significantly vulnerable against the failures of a central optical line termination (OLT) unit. Recently, an innovative idea about forming a simple ring topology by using asymmetric passive splitters together with secondary OLT unit has been presented and an elementary mathematical model for calculations of optimum splitting ratios of all splitters in a ring infrastructure has been described. The major advantage of presented ring topology is that both primary and secondary OLT units can be placed on the opposite sides of the ring, which could greatly increase the overall resistance of the whole network against critical failures, malfunctions, or sophisticated attacks. Next, this ring topology was successfully realized in practice by using real OLT and optical network units and the whole idea verified. The results of real measurements as well as theoretical calculations are presented in this article. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2201–2205, 2013