HW-TSC. (IMAGE)
Caption
(a) Schematic illustration of the HW-TSC. The optical fiber was helically wound around a continuous mandrel to function as an acoustic sensor. (b) Photograph of the HW-TSC and the anechoic tank. One segment of the cable was helically fixed to a cylindrical shelf with a diameter of 60 cm. The head end of the cable was connected to the HD-DAS interrogator to collect distributed acoustic signals. The shelf was then placed in an anechoic pool to calibrate the cable’s acoustic pressure sensitivity. (c) Acoustic signal collected by the HW-TSC, showing a distributed pattern. (d) Comparison of the acoustic signal collected by the HW-TSC (blue curve) and a standard piezoelectric hydrophone (red curve). The two signals showed significant consistency, except for noticeable tailing in the acoustic signal of the cable. a.u.: arbitrary units. (e) The acoustic pressure sensitivity of the HW-TSC. The average sensitivity of the HW-TSC was approximately −143.1 dB re rad·μPa−1 (referenced to 1 rad·μPa−1), with a maximum fluctuation of 12.6 dB within the measured frequency band.
Credit
Xiangge He, Pengfei Wen, Qingqing Su, Hui Yang, Lijuan Gu, Min Zhang, Hailong Lu
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License
CC BY-NC-ND