LPG Fiber Optic Sensing
A fiber-optic sensing platform based on a transient and traveling long-period grating (LPG) in a single-mode optical fiber has been proposed and demonstrated. Fibre Long Period Gratings (LPGs) and Tapers (adiabatic and non-adiabatic) are both devices that couple light from the fibre core into cladding modes. Relative humidity (RH) is an important factor in the field of structural health monitoring, especially during the early stage of corrosion. Many methods have been proposed for humidity sensing, and one of the attractive sensors is fiber-optic long-period grating (LPG) sensors. The FBG enables real-time temperature compensation, while the SP-LPG offers high.
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