Michelson Interferometry Interrogates Fiber Bragg Grating Sensors
Fiber Bragg gratings, which have had such success in wavelength division multiplexing for telecommunications, also have been adapted to environmental sensors. These sensors measure parameters such as temperature, pressure and strain, which cause shifts in the peak of the spectrum reflected from the grating. Because the required information from a fiber Bragg grating sensor is carried with the wavelength of the reflected optical signal, the method of measuring the absolute wavelength is a...
Photonics Spectra, October 2003