title: Parallel demodulation system and signal-processing method for extrinsic Fabry-Perot interferometer and fiber Bragg grating sensors.
abstract: A parallel demodulation system for extrinsic Fabry-Perot interferometer (EFPI) and fiber Bragg grating (FBG) sensors is presented that is based on a Michelson interferometer and combines the methods of low-coherence interference and Fourier transform spectrum. Signals from EFPI and FBG sensors are obtained simultaneously by scanning one arm of a Michelson interferometer, and an algorithm model is established to process the signals and retrieve both the wavelength of the FBG and the cavity length of the EFPI at the same time, which are then used to determine the strain and temperature.
authors.affiliation: College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China. jiangjfjxu@hotmail.com
authors.forename: Junfeng
authors.initials: J
authors.lastname: Jiang
authors.forename: Tiegen
authors.initials: T
authors.lastname: Liu
authors.forename: Yimo
authors.initials: Y
authors.lastname: Zhang
authors.forename: Lina
authors.initials: L
authors.lastname: Liu
authors.forename: Ying
authors.initials: Y
authors.lastname: Zha
authors.forename: Fan
authors.initials: F
authors.lastname: Zhang
authors.forename: Yunxin
authors.initials: Y
authors.lastname: Wang
authors.forename: Pin
authors.initials: P
authors.lastname: Long