Ultrasound has strong penetrability in opaque media, which makes it one of the most
important detection tools for structural safety monitoring. Compared with the traditional …

Damages such as cracking or impact loading in civil, aerospace, and mechanical structures
generate transient ultrasonic waves, which can be used to reveal the structural health …

The technology of non-contact and non-destructive detection of acoustic and ultrasound
waveforms play an importance role in industrial application which make it possible to …

A high-sensitivity ultrasonic sensing system is proposed and demonstrated. In this system, a
phase-shifted fiber Bragg grating (PS-FBG) is used as a sensor to achieve broadband and …

The performance of a highly sensitive strain sensor based on nonlinear four-wave mixing
(FWM) using a fiber Bragg grating (FBG) is investigated. The power change due to the …

Two-wave mixing interferometry based on photorefractive crystals stands out among many
techniques for monitoring dynamic strain because it can provide multiple dynamic sensing …

A simple and unique scheme of high-sensitive fiber Bragg grating (FBG) interrogation
system based on microwave signal measurement utilizing the concept of microwave …

In this work, we investigated the applicability and effectiveness of ultrasound detection using
laser frequency modulated phase shifting interferometry. A quasi-continuous quadrature …

In this paper, we propose a semiconductor optical amplifier (SOA)-fiber ring laser (FRL) for
fiber Bragg grating (FBG) dynamic strain sensing system with an adaptive demodulator …

We present an improved detection scheme for a two-wave mixing interferometer with a
Bi12SiO20 crystal. The proposed detection scheme allows quasi-balanced detection of …