Discussion on the sensitivity of optical cables based on distributed acoustic sensing

Abstract

Distributed acoustic sensing (DAS) technology plays an increasingly important role in the field of underwater acoustic detection because of its own advantages. To measure acoustic pressure sensitivity of seven kinds of optical cables in the same condition synchronously, the experimental setup based on DAS is proposed. Seven kinds of optical cables are connected in series to the DAS system, and the acoustic pressure sensitivity at different locations (different optical cables) is detected simultaneously via the DAS system. The highest acoustic pressure sensitivity of the sensitized optical cable is 69.9 mrad/Pa. The experimental results provide experimental data support for the selection of optical cables.