关键词: 光纤SPR传感器/
全相位滤波/
解调算法/
生物传感
English Abstract
Optical fiber SPR sensing demodulation algorithm based on all-phase filters
Cao Yu-Zhen1,Ma Jin-Ying1,
Liu Kun1,2,
Huang Xiang-Dong3,
Jiang Jun-Feng1,2,
Wang Tao1,2,
Xue Meng1,2,
Liu Tie-Gen1,2
1.School of Precision Instrument and Opto-electronics Engineering, Tianjin 300072, China;
2.Key Laboratory of Opto-electronics Information Technology, EMC, Tianjin 300072, China;
3.School of Electronics Information Engineering, Tianjin 300072, China
Fund Project:Project supported by the National Natural Science Foundation of China (Grant Nos. 61475114, 61227011), and the National Instrument Program, China (Grant No. 2013YQ030915).Received Date:09 October 2016
Accepted Date:05 January 2017
Published Online:05 April 2017
Abstract: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.
Keywords: fiber surface plasmon resonance sensor/
all-phase filter/
demodulation algorithm/
biological sensing
