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Optical Engineering

Noise reduction in the surface plasmon resonance array sensor
Author(s): Zihao Huang; Xiaoping Wang
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Paper Abstract

Methods to improve the performance of the surface plasmon resonance array sensor at ambient temperature are studied. A self-reference channel was used to eliminate the long-term drift caused both by the temperature and the light source. The Hilbert–Huang transform-based signal post-processing algorithm was employed to improve the signal-to-noise ratio and reduce high-frequency noise. Finally, an adaptive moving-average method was adopted to reduce noise while preserving important high-frequency signal characteristics. A combination of these methods decreased the baseline noise to 3.6×10 −6 refractive index unit. Acceptable repeatability was achieved with relative standard deviation 2.20% (n=8 ). The limit of detection of NaCl was measured at 69  mg/L .

Paper Details

Date Published: 5 April 2013
PDF: 7 pages
Opt. Eng. 52(4) 044403 doi: 10.1117/1.OE.52.4.044403
Published in: Optical Engineering Volume 52, Issue 4
Show Author Affiliations
Zihao Huang, Zhejiang Univ. (China)
Xiaoping Wang, Zhejiang Univ. (China)

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