Micro seismic monitoring technologies based on fiber laser sensors were introduced.Owing to the characteristics of narrow line width, low noise, fiber laser
A distributed acoustic sensing (DAS) scheme is presented.Rayleigh backscattered light which contains acoustic signal induced phase changes along the sensing
We measure the phase noise and linewidth of 6 asymmetrical Distributed FeedBack Fiber Lasers (DFB FL) using unbalanced Michelson interferometer and delayed
Ultrasound transmitters are widely used in various applications such as medical imaging and structural health monitoring.Most recently, traditional ultrasou
The optic refractive index is an essential parameter of material.It is a very important way for component analysis and concentration measurement.This paper
Laser ultrasonic (LU) three-dimensional (3D) imaging system combining wavelet threshold method (WTM) is presented, in which a laser beam is as a scanner and
We report recent developments in absorption-based optical gas sensors with hollow-core photonic bandgap fibres.Techniques for improving response time and en
An amplified and narrow-linewidth distributed feedback fiber laser in MOPA (Master Oscillator Power Amplifier) configuration is presented.It consists of a d
Hydrogen is regarded as one of the promising candidates for next generation of renewable energy, and hydrogen-loaded natural gas (HCNG) is widely developed
A review of regenerated gratings is reported, including regenerated LPGs and the implications for high temperature sensing using silica fibres more broadly