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Proceedings Paper

Melamine sensing based on evanescent field enhanced optical fiber sensor
Author(s): Ji Luo; Jun Yao; Wei-min Wang; Xu-ye Zhuang; Wen-ying Ma; Qiao Lin
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Paper Abstract

Melamine is an insalubrious chemical, and has been frequently added into milk products illegally, to make the products more protein-rich. However, it can cause some various diseases, such as kidney stones and bladder cancer. In this paper, a novel optical fiber sensor with high sensitivity based on absorption of the evanescent field for melamine detection is successfully proposed and developed. Different concentrations of melamine changing from 0 to 10mg/mL have been detected using the micro/nano-sensing fiber decorated with silver nanoparticles cluster layer. As the concentration increases, the sensing fiber’s output intensity gradually deceases and the absorption of the analyte becomes large. The concentration changing of 1mg/ml can cause the absorbance varying 0.664 and the limit of the melamine detectable concentration is 1ug/mL. Besides, the coupling properties between silver nanoparticles have also been analyzed by the FDTD method. Overall, this evanescent field enhanced optical fiber sensor has potential to be used in oligo-analyte detection and will promote the development of biomolecular and chemical sensing applications.

Paper Details

Date Published: 29 August 2013
PDF: 9 pages
Proc. SPIE 8914, International Symposium on Photoelectronic Detection and Imaging 2013: Fiber Optic Sensors and Optical Coherence Tomography, 891412 (29 August 2013); doi: 10.1117/12.2034676
Show Author Affiliations
Ji Luo, Institute of Optics and Electronics (China)
Univ. of the Chinese Academy of Sciences (China)
Jun Yao, Institute of Optics and Electronics (China)
Wei-min Wang, Institute of Optics and Electronics (China)
Univ. of the Chinese Academy of Sciences (China)
Xu-ye Zhuang, East China Institute of Photo-Electron ICs (China)
Wen-ying Ma, Chengdu Univ. of Information Technology (China)
Qiao Lin, Columbia Univ. (United States)


Published in SPIE Proceedings Vol. 8914:
International Symposium on Photoelectronic Detection and Imaging 2013: Fiber Optic Sensors and Optical Coherence Tomography
Yunjiang Rao, Editor(s)

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