FBG Arrays for Quasi-Distributed Sensing: A Review

Abstract Fiber Bragg grating (FBG) array is a powerful technique for quasi-distributed sensing along the entire length of fiber with fast response and high precision. It has been widely used temperature, strain, vibration monitoring. In this review work, an overview on recent advances FBG arrays conducted. Firstly, fabrication methods are reviewed, which include femtosecond laser system online writing technique. Then, demodulation techniques presented discussed. Distributed static can be performed by demodulating wavelength shift each FBG, while phase low noise employed dynamic sensing. Simultaneous distributed based also outlined. Finally, possible future directions discussed concluded. believed that great development potential application prospect.