Noise reduction in the surface plasmon resonance array sensor

Zihao Huang; Xiaoping Wang

doi:10.1117/1.OE.52.4.044403

5 April 2013 Noise reduction in the surface plasmon resonance array sensor

Zihao Huang, Xiaoping Wang

Author Affiliations +

Optical Engineering, Vol. 52, Issue 4, 044403 (April 2013). https://doi.org/10.1117/1.OE.52.4.044403

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 .

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Zihao Huang and Xiaoping Wang "Noise reduction in the surface plasmon resonance array sensor," Optical Engineering 52(4), 044403 (5 April 2013). https://doi.org/10.1117/1.OE.52.4.044403

Published: 5 April 2013

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