Signal detection of an optical fiber surface plasmon resonance sensor
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摘要: 光纤表面等离子体共振(SPR)传感器是目前应用在环境介质检测和生物大分子检测等方面的新型、高精度传感器。首先,以表面等离子体共振传感理论为基础,对系统检测结果进行数据处理,得出采用均值估计的线性模型。在不同时刻与相同环境介质下,检测某一溶液的十组光谱数据并进行均值估计,从而得到有效的共振波长。其次,利用小波分析方法进行信号处理,校正了噪声产生的漂移,对光谱信号压缩处理,以提高检测精度。再通过Matlab进行模拟仿真优化传感系统性能。并对不同折射率溶液如蒸馏水、酒精等进行检测,得到了良好的光谱响应曲线,证明了在检测范围内折射率和共振波长之间具有良好的线性关系。
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关键词:
- 表面等离子体共振 /
- 光纤表面等离子体共振传感器 /
- 小波去噪
Abstract: The optical fiber surface plasmon resonance (SPR) sensor is an advanced and high-precision sensor, used mainly in environmental pollution detection and detection of biopolymers. Firstly, based on the plasmon resonce sensing theory, the estimate of meaning linear model was obtained by a discussion of our experimental results and the system's data-processing issue. Then, based on the estimate of meaning linear model, a number of groups of a solutions were measured at different times and under the same circumstances and their spectral data was obtained, leading to the estimate of the effective resonance wavelength. Secondly, a wavelet analysis for the SPR reflected spectrum is carried out. The deviation of the resonant wavelength caused by noise was corrected, and the experimental data was filtered by a wavelet analysis, improving the system precision. Parameters impacting the fiber-optic SPR sensor performance were analyzed by theoretical calculation and simulation used Matlab, to optimize the sensing system design. Differences of the refractive index of test solutions such as distilled water, alcohol, etc, have been measured. Our design of the optical fiber SPR sensing systems was proved to be feasible and worked well. The result shows the relationship between the refractive index and SPR wavelength that is well linear within the measurable refractive index range.-
Key words:
- surface plasmon resonance /
- optical fiber SPR sensor /
- wavelet denoising
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[1] [2] Otto A. Excitation of nonradiative surface plasmon waves in silver by the method of frustrated total reflection[J]. Z Phys, 1968, 216: 398-410. [3] [4] Kretchmann E. The determination of the optical constants of metals by exciation of surface plasmons[J]. Z physick, 1971, 241: 313-324. [5] Piliarik M, Homola J, Manikova Z. Surface plasmon reasonance sensor based on a single-mode polarization-maintaining optical fiber[J]. Sensors and Actuators B, 2003, 90(1-3): 236-242. [6] [7] Wang T J, Tu C W, Liu F K. Surface Plasmon reasonance waveguide biosensor by bipolarization wavelength interrogation[J]. IEEE Photonics Technology Letters, 2004, 16(7): 1715-1717. [8] [9] [10] Englebienne P, Van H, Verhas M. Surface Plasmon reasonance: principles, methods and applications in biomedical sciences[J]. Spectroscopy, 2003, 17: 225-273. [11] [12] Lin W B. Optical fiber as a whole surface probe for chemical and biological applications[J]. Sensors and Actuators B, 2001, 74(1-3): 207-211. [13] [14] Mou Haiwei, Wang Hongjin, Wang Qiang, et al. Simulation study on surface plasmon resonance[J]. Optical Instruments, 2011, 33(2): 1-6. (in Chinese) [15] [16] Zheng Jie. Research and application on optical fiber surface plasmon resonance sensor[D]. Nanjing: Nanjing University of Aeronautics and Aeronautics, 2004. (in Chinese) [17] Du Yan, Liang Dakai. Chinese journal of quantum electronics[D]. Beijing: China University of Geosciences, 2012. (in Chinese) [18] [19] [20] Liu Chao, Sun Qi, Zhang Zihua, et al. Research on theoretical simulation of gas hold-up optical fiber sensors based on surface plasmon resonance[J]. Science Technology and Engineering, 2012, 12(14): 1671-1815. (in Chinese) [21] [22] Yuan Yinquan, Hu Die, Li Hua, et al. Theoretical investigations for surface Plasmon resonance based optical fiber tip sensor[J]. Sensors and Actuators B: Chemical, 2013, 188: 757-760. (in Chinese) [23] [24] Li Dayong, Cao Zhenxin, Wu Lenan. Data analysis in the optical fiber surface plasmon resonance sensing systems[J]Journal of Electronics Information Technology, 2006, 28(10): 1946. [25] [26] Sun Yankui. Wavelet Analysis and Its Application[M]. Beijing: China Machine PRESS, 2005. (in Chinese) [27] Lu Xiaoquan, Liu Hongde. The Wavelet Analysis Technology in Analytical Chemistry[M]. Beijing: Chemical Industry Press, 2006: 97-129. (in Chinese)
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