New realization method for noise suppression in fiber interferometer sensors

To achieve higher accuracy, a new measurement method for noise suppression is demonstrated, based on two interleaved fiber Michelson interferometers which share the common interferometric-optical path by employing fiber Bragg gratings (FBG). One of the interferometers is used for monitoring environmental perturbations, which takes the advantage of the reflective properties of grating; the other is used for the detection of the real information under test including the environmental perturbations, which takes the advantage of the transmission properties of grating. Process the two signals using Lab VIEW based on PGC technique, to eliminate the environmental noise from the information, which is on the actual need to detect. The experiments show the random phase drift caused by environmental disturbances is eliminated effectively, improving the operation performance.