Zhaoyong Wang, Bin Lu, Lei Ye, Kang Ying, Yanguang Sun, Nan Cheng, Zhan Lu, Qing Ye, Haiwen Cai. Distributed Optical Fiber Acoustic Sensing and Its Application to Seismic Wave Monitoring[J]. Laser & Optoelectronics Progress, 2021, 58(13): 1306006
- Laser & Optoelectronics Progress
- Vol. 58, Issue 13, 1306006 (2021)
![Principle schemes of Φ-OTDR and OFDR[22]](/richHtml/lop/2021/58/13/1306006/img_1.jpg)
Fig. 1. Principle schemes of Φ-OTDR and OFDR[22]
![Information mining of DAS spatially dense data. (a) Three channel multi-dimension samples of disturbance event[54]; (b) rail view analysis[65]](/richHtml/lop/2021/58/13/1306006/img_2.jpg)
Fig. 2. Information mining of DAS spatially dense data. (a) Three channel multi-dimension samples of disturbance event[54]; (b) rail view analysis[65]
![3D spatial localization[53]. (a) Spatial spectrum distribution; (b) multi-point localization results](/Images/icon/loading.gif){kind=icon}
Fig. 3. 3D spatial localization[53]. (a) Spatial spectrum distribution; (b) multi-point localization results
Fig. 4. Composite helical fiber structures[71]. (a) Double helical and straight fibers; (b) single helical and straight fibers; (c) chirp helical fiber
Fig. 5. Multi-source aliasing suppression[72]. (a) Quantitative demodulation data and processed results of directional listening at different azimuths; (b) 0°; (c) 60°; (d)‒(f) the corresponding spectrograms
Fig. 6. DAS response of active P-wave source (source offset 762 m, 8 sweeps)[75]
Fig. 8. Rock fall and glacier quake monitoring[81]. (a) Field layout; (b) seismic wave view from DAS
Fig. 9. Pseudo-color imaging of shear-wave velocity profiles and time-lapse monitoring of groundwater level[83]
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