Vector bending sensor based on an edge-core cladding-type fiber Bragg grating
Fengyi Chen, Xingyong Li, Weijia Bao, Ruohui Wang, Xueguang Qiao
Abstract
A two-dimensional vector bending sensor that is both compact and simple is proposed and demonstrated, based on an edge-core cladding-type fiber Bragg grating (ECLFBG) inscribed in an edge-core. The ECLFBG is written parallel to the edge-core using a femtosecond laser point-by-point technique. The reflection spectrum of this ECLFBG varies significantly depending on the magnitude and direction of the fiber's bend. Combining the trend and sensitivity of the wavelength shift and reflection intensity variations of the ECLFBG, the bending magnitude and direction can be measured simultaneously.
Topics & Concepts
OpticsFiber Bragg gratingMaterials scienceCladding (metalworking)FemtosecondLong-period fiber gratingPolarization-maintaining optical fiberFiber optic sensorOptical fiberLaserPhysicsMetallurgyAdvanced Fiber Optic SensorsPhotonic and Optical DevicesPhotonic Crystal and Fiber Optics