Interferometric Distributed Sensing System With Phase Optical Time-Domain Reflectometry

• 来源期刊: 光子传感器（英文版）
• 关键词: Fiber optics sensors Rayleigh scattering optical time domain reflectometry interferometry
• 年，卷（期）: 2017,（2）
• 页码范围: 157-162
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s13320-016-0350-8

摘要

We demonstrate a distributed optical fiber sensing system based on the Michelson interferometer of the phase sensitive optical time domain reflectometer (φ-OTDR) for acoustic measurement.Phase,amplitude,frequency response,and location information can be directly obtained at the same time by using the passive 3×3 coupler demodulation.We also set an experiment and successfully restore the acoustic information.Meanwhile,our system has preliminary realized acoustic-phase sensitivity around-150 dB (re rad/μPa) in the experiment.