Photorefractive volume holographic demodulation of in-fiber Bragg grating sensors

摘要

A demodulation scheme for an in-fiber Bragg grating sensor using a volumeholographic filter formed in photorefractive BaTiO3 is proposed anddemonstrated. A strain range of 2500 μstrain, with minimum detectable strain of4 μstrain/√Hz, is measured. Extension of the technique to allow demodulation ofarrays of sensors is discus