Ningmu Zou

Sep 25, 2024 | mdpi.com | Zhen Zhong |Ningmu Zou |Xuping Zhang

1. IntroductionFiber sensors integrated with optical grating, which are quasi-distributed, have played a great role in fields of seismic wave exploration [1], fiber-optic hydrophone [2], etc. However, the demodulation of fiber sensors integrated with optical grating is complicated and expensive. Recently, a distributed acoustic sensor (DAS) based on the principle of quantitative measurement of Φ-OTDR has been used to measure seismic waves and other vibration events [3,4].