We demonstrated a fiber optic distributed acoustic sensor based on a double Sagnac
interferometer, using two wavelengths separated by CWDM modules. A mathematical model …

Aiming at the location problem of high-pressure pipeline leakage, this paper proposes a
method for predicting the disturbed position of a Sagnac distributed optical fiber sensing …

A novel distributed fiber-optic sensor is proposed and demonstrated, in which two Mach-
Zehnder interferometers are used to detect the interference signals with different …

Partial discharge detection is crucial for electrical cable safety evaluation. The ultrasonic
signals frequently generated in the partial discharge process contains important …

A distributed fiber-optic sensor based on a hybrid configuration of dual-Sagnac
interferometer is proposed and demonstrated. The polarization compensation module is …

An improved algorithm named “twice-FFT” for multi-point intrusion location in distributed
Sagnac sensing system is proposed and demonstrated. To find the null-frequencies more …

Distributed optical fiber sensing interferometers have emerged as promising tools for various
sensing applications. In this article, we present a novel 2-D timestamp-based sliding window …

A line-based fiber optic sensor employing time delay estimation to locate time-varying
disturbance is proposed. The sensor consists of two line-based interferometers, multiplexed …

Accurate underwater gas pipeline leak localization requires particular attention due to the
sensitivity of environmental conditions. Experiments were performed to analyze the …

A real-time distributed optical fiber vibration sensing prototype based on the Sagnac
interference in conjunction with the optical time domain reflectometry (OTDR) was …