| 摘要 |
PROBLEM TO BE SOLVED: To provide a fracture point detection system of a passive optical line network. SOLUTION: A monitor light signal is supplied to an optical fiber branch route by a main control domain, and the optical fiber branch route feedbacks a different reflected light signal to the main control domain by a different passive optical line network structure. Hereby, an optical spectrum analyzer and an optical time-domain reflection measuring device in the main control domain determine whether a fracture point is generated on the optical fiber branch route of the passive optical line network or not, or a position of the fracture point, based on a fed-back reflected light signal. COPYRIGHT: (C)2009,JPO&INPIT
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