Photonic Sensors, 2017, 7 (2): 157–162, 网络出版: 2017-05-09
Interferometric Distributed Sensing System With Phase Optical Time-Domain Reflectometry
Interferometric Distributed Sensing System With Phase Optical Time-Domain Reflectometry
Fiber optics sensors Fiber optics sensors Rayleigh scattering Rayleigh scattering optical time domain reflectometry optical time domain reflectometry interferometry interferometry
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.
Abstract
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.
Chen WANG, Ying SHANG, Xiaohui LIU, Chang WANG, Hongzhong WANG, Gangding PENG. Interferometric Distributed Sensing System With Phase Optical Time-Domain Reflectometry[J]. Photonic Sensors, 2017, 7(2): 157–162. Chen WANG, Ying SHANG, Xiaohui LIU, Chang WANG, Hongzhong WANG, Gangding PENG. Interferometric Distributed Sensing System With Phase Optical Time-Domain Reflectometry[J]. Photonic Sensors, 2017, 7(2): 157–162.
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