Open AccessSelf-suppression of common-mode noises of the different fiber optic interferometric accelerometers
Author(s) -
Duo Yi,
Xiaofeng He,
Liu Fei,
Lijuan Gu,
Min Zhang,
Xiaokang Qiu,
Han Ye
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.015384
Subject(s) - accelerometer , interferometry , optical fiber , fiber optic sensor , michelson interferometer , optics , fiber bragg grating , materials science , computer science , acoustics , physics , operating system
This study proposes two new fiber optic interferometric accelerometers with the utilization of the push-pull structure, one is based on the principle of triple low-reflectivity fiber Bragg gratings, and the other is based on the 1x3 unbalanced Michelson interferometer. The proposed accelerometers are capable of suppressing the common-mode noises (CMNs) by themselves without additional reference accelerometers, and therefore reducing the volume and the cost of the sensing system. Besides, the accelerometers can also suppress the sensor noises caused by the environment, and therefore show better CMNs suppression effect than the traditional method of using the reference accelerometer. The two accelerometers are experimentally verified and show respectively an improvement of 33 dB and 28 dB in CMNs suppression at 100 Hz. Both presented fiber optic accelerometers show huge advantages for the large-scale quasi-distributed oil and gas reservoir monitoring applications.