Patent ID: 6448551
Filing Date: 2002-09-10
Classification: G01D,G01L

Abstract:
A fiber Bragg grating sensor system for sensing a parameter, including temperature or strain, comprising:a structured sensor fiber Bragg grating, responsive to an optical signal, and further responsive to a sensed parameter, for providing a structured fiber Bragg grating sensor signal containing information about the sensed parameter; and a broadband light source, coupler, readout grating mixing and spectral analysis system for providing the optical signal, and responsive to the structured sensor fiber Bragg grating signal, mixing the structured fiber Bragg grating sensor signal with a reference grating spectrum, for providing a broadband source, coupler, readout grating mixing and spectral analysis system signal containing information about a mixed spectral analysis of the structured sensor fiber Bragg grating signal that is used to determine the sensed parameter.