Abstract
Dai-Hua WangPing-Gang JiaChongqing UniversityKey Laboratory of Optoelectronic Technology andSystems of the Ministry of Education of ChinaRoom 1407, Main Teaching BuildingChongqing 400044, ChinaandPrecision and Intelligence LaboratoryDepartment of Optoelectronic EngineeringRoom 1407, Main Teaching BuildingChongqing 400044, ChinaE-mail: dhwang@cqu.edu.cnAbstract. The principle of a fiber optic Fabry–Perot (F–P) accelerometer(FOFPA) system using the laser emission frequency modulated phasegenerated carrier (FMPGC) demodulation scheme is first described andexperimentally demonstrated. The F–P cavity, which is constituted byplacing the end face of a gradient-index lens in parallel with the reflectoron the inertial mass, directly translates the inertial mass’s displacementgenerated by the measured acceleration into phase shifts of the interfer-enceoutputfromtheF–Pcavity.AnFMPGCdemodulationschemebasedon the arctangent (Arctan) algorithm is adapted to demodulate the phaseshifts. The sensing model for the FOFPA system using the FMPGC–Arctan demodulation scheme is established and the sensing characteris-tics are theoretically analyzed. On these bases, the FOFPA is designedand fabricated and a prototyping system is built and tested. The resultsindicate that: (1) the nonlinearity of the FOFPA system using theFMPGC–Arctan demodulation scheme is less than 0.58%, (2) the reso-nant frequency, on-axial sensitivity, and resolution are 393 Hz,13.11 rad∕g, and 450 μg∕Hz
Published Version
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