title: FBG Interrogation Method with High Resolution and Response Speed Based on a Reﬂective-Matched FBG Scheme.
abstract: In this paper, a high resolution and response speed interrogation method based on a reﬂective-matched Fiber Bragg Grating (FBG) scheme is investigated in detail. The nonlinear problem of the reﬂective-matched FBG sensing interrogation scheme is solved by establishing and optimizing the mathematical model. A mechanical adjustment to optimize the interrogation method by tuning the central wavelength of the reference FBG to improve the stability and anti-temperature perturbation performance is investigated. To satisfy the measurement requirements of optical and electric signal processing, a well- designed acquisition circuit board is prepared, and experiments on the performance of the interrogation method are carried out. The experimental results indicate that the optical power resolution of the acquisition circuit border is better than 8 pW, and the stability of the interrogation method with the mechanical adjustment can reach 0.06%. Moreover, the nonlinearity of the interrogation method is 3.3% in the measurable range of 60 pm; the influence of temperature is significantly reduced to 9.5%; the wavelength resolution and response speed can achieve values of 0.3 pm and 500 kHz, respectively.
authors.affiliation: Institute of Ultra-precision Optoelectronic Instrument Engineering, Science Park, Harbin Institute of Technology, No. 2 Yikuang Street, Nangang District, Harbin 150080, China. cuijiwen@hit.edu.cn.
authors.forename: Jiwen
authors.initials: J
authors.lastname: Cui
authors.affiliation: Institute of Ultra-precision Optoelectronic Instrument Engineering, Science Park, Harbin Institute of Technology, No. 2 Yikuang Street, Nangang District, Harbin 150080, China. hithy@hit.edu.cn.
authors.forename: Yang
authors.initials: Y
authors.lastname: Hu
authors.affiliation: Institute of Ultra-precision Optoelectronic Instrument Engineering, Science Park, Harbin Institute of Technology, No. 2 Yikuang Street, Nangang District, Harbin 150080, China. aifenglin@gmail.com.
authors.forename: Kunpeng
authors.initials: K
authors.lastname: Feng
authors.affiliation: Institute of Ultra-precision Optoelectronic Instrument Engineering, Science Park, Harbin Institute of Technology, No. 2 Yikuang Street, Nangang District, Harbin 150080, China. duckhome@163.com.
authors.forename: Junying
authors.initials: J
authors.lastname: Li
authors.affiliation: Institute of Ultra-precision Optoelectronic Instrument Engineering, Science Park, Harbin Institute of Technology, No. 2 Yikuang Street, Nangang District, Harbin 150080, China. jbtan@hit.edu.cn.
authors.forename: Jiubin
authors.initials: J
authors.lastname: Tan
mesh_terms: D005336:Fiber Optic Technology; D014159:Transducers
keywords: FBG interrogation method; high response speed; high wavelength resolution; reﬂective-matched FBG