Comparison investigation of DAS measurements between fibers in/on the cable for the smartification of optical fiber cables

Distributed acoustic sensing (DAS) using optical fiber cables is expected to have various applications. While dark fibers in the cable can be used for DAS, the installation of dedicated sensors on the cable is also a viable option. This study compares DAS measurements using fibers in/on the optical fiber cable. The results indicate that the dedicated sensing fiber exhibited superior measurement performance in several aspects, while dark fibers are affected by various factors, leading to more complex measurement results.