OTDR performance enhancement using a quaternary FSK modulated probe and coherent detection
作者： M. Sumida
DOI: 10.1109/68.372764
关键词:
摘要: This letter proposes a new approach to enhance the performance of optical time domain reflectometry (OTDR). employs probe signal modulated in quaternary frequency-shift-keying (FSK) format and coherent detection technique. Experiments show that proposed reduces measurement one fourth without sacrificing dynamic range spatial resolution on 1100-km-long transmission line with amplifiers. >
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