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This paper describes a technique for the dynamics enhancement of OTDR-based passive optical network monitoring systems using Raman amplification. By choosing a suitable pump wavelength co-propagating with the test signal, authors experimentally show that it is possible to obtain a 16 dB increase of the dynamics. This enables the detection of more faults and fiber breaks. Fiber-To-The-Home (FTTH) technology using Passive Optical Networks (PON) is the most promising way to provide high quality broadband access. PON are nowadays extensively studied and some commercial deployments are already reported. It is clear that the development of reliable monitoring systems is required for the practical implementation of such networks.
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