Latest Development of Tilted Fiber Bragg Grating Sensors

In recent years, tilted fiber Bragg grating sensors (TFBGs) have attracted much attention as a kind of particular sensors. In addition to its inherent advantages as fiber Bragg grating, TFBGs own characteristics of high environmental refractive index sensitivity and can resolve the temperature-strain cross-sensitivity problem. The main principles of TFBGs are explained and the latest research progresses are reviewed in terms of grating tilt angles, strain, temperature and SRI. Furthermore, the future developing trends are proposed.