外文题目: Phase-Sensitive Optical Time-Domain Reflectometer Based on a 120 degrees-Phase-Difference Michelson Interferometer
作者: 曹玉龙; 杨飞; 徐丹; 叶青; 蔡海文; 方祖捷
刊名: Chin. Phys. Lett.
年: 2016 卷: 33 期: 5 文章编号：50701
英文关键词:

FIBER COUPLER; OTDR
英文摘要:
A phase-sensitive optical time domain reflectometer (phi-OTDR) based on a 120 degrees-phase-difference Michelson interferometer is proposed. The Michelson interferometer with arm difference of 4m is used to test the phase difference between the Rayleigh scattering from two sections of the fiber. A new demodulation method called the inverse transmission matrix demodulation scheme is utilized to demodulate the distributed phase from the backward scattering along the long fiber. The experimental results show that the 120 degrees-phase-difference interferometer phi-OTDR can detect the phase along the 3km fiber, and the acoustic signal within the whole human hearing range of 20 Hz-20 kHz is reproduced accurately and quickly.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1088/0256-307X/33/5/050701


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