Wenjie Chen, Junfeng Jiang, Kun Liu, Shuang Wang, Zhe Ma, Guanhua Liang, Zhenyang Ding, Tianhua Xu, Tiegen Liu, "Self-copy-shift-based differential phase extracting method for fiber distributed acoustic sensing," Chin. Opt. Lett. 18, 081201 (2020)
- Chinese Optics Letters
- Vol. 18, Issue 8, 081201 (2020)
Fig. 1. (a) Scheme of self-copy-shift-based differential phase coherent OTDR system. (b) Scheme diagram of digital shift time calculating.
Fig. 2. Diagram of phase demodulation algorithm.
Fig. 3. (a) Three-dimensional (3D) plot of spatial-temporal domain retrieved result of AM signal. (b) The retrieved waveform temporal domain curve at 1050 m from 0 to 120 ms. (c) The partial enlargement graph of the temporal domain curve at 1050 m from 15 to 60 ms. (d) Power spectral density (PSD) of the recovered signal.
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