Open AccessOptical fiber SPR sensing demodulation algorithm based on all-phase filters
Author(s) -
Cao Yu-Zhen,
Jinying Ma,
Kun Liu,
Xiangdong Huang,
Juan Jiang,
Tao Wang,
Ming Xue,
Tiegen Liu
Publication year - 2017
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.66.074202
Subject(s) - demodulation , surface plasmon resonance , refractive index , optics , sensitivity (control systems) , fiber optic sensor , materials science , wavelength , filter (signal processing) , optical fiber , computer science , optoelectronics , telecommunications , physics , electronic engineering , nanotechnology , channel (broadcasting) , nanoparticle , engineering , computer vision
Aiming at the urgent requirements for refractive index detection in the biological sample detection area, an all-fiber surface plasmon resonance (SPR) system is established in this paper. And the SPR characteristic wavelength demodulation algorithm is proposed for this system based on all-phase filter technique. According to the system simulation, the refractive index sensing sensitivity of the fiber SPR sensor can be calculated theoretically. By using the all-phase filter technique, the characteristic wavelength of the fiber SPR sensor can be extracted, and the theoretically analytical expression of the all-phase filter can be obtained. The experimental results show that the refractive index sensing sensitivity and the detection resolution of the fiber SPR sensor are 1640.4 nm/RIU and 7.3610-4 RIU respectively by using this algorithm. Compared with the traditional methods, our algorithm can improve the detection precision and the anti-light-disturbance performance and reduce the costs as well.