Photonic sensors review recent progress of fiber sensing technologies in Tianjin University
ABSTRACT The up to date progress of fiber sensing technologies in Tianjin University are proposed in this paper. Fiber-optic temperature
sensor based on the interference of selective higher-order modes in circular optical fiber is developed. Parallel demodulation
for extrinsic Fabry-Perot interferometer (EFPI) and fiber Bragg grating (FBG) sensors is realized based on white light interference.
Gas concentration detection is realized based on intra-cavity fiber laser spectroscopy. Polarization maintaining fiber (PMF)
is used for distributed position or displacement sensing. Based on the before work and results, we gained National Basic Research
Program of China on optical fiber sensing technology and will develop further investigation in this area.
KeywordsFiber sensing–high temperature–parallel demodulation–gas detection–distributed sensing