Melamine sensing based on evanescent field enhanced optical fiber sensor

Ji Luo; Jun Yao; Wei-min Wang; Xu-ye Zhuang; Wen-ying Ma; Qiao Lin

doi:10.1117/12.2034676

29 August 2013 Melamine sensing based on evanescent field enhanced optical fiber sensor

Ji Luo, Jun Yao, Wei-min Wang, Xu-ye Zhuang, Wen-ying Ma, Qiao Lin

Proceedings Volume 8914, International Symposium on Photoelectronic Detection and Imaging 2013: Fiber Optic Sensors and Optical Coherence Tomography; 891412 (2013) https://doi.org/10.1117/12.2034676
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

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.

Citation Download Citation

Ji Luo, Jun Yao, Wei-min Wang, Xu-ye Zhuang, Wen-ying Ma, and Qiao Lin "Melamine sensing based on evanescent field enhanced optical fiber sensor", Proc. SPIE 8914, International Symposium on Photoelectronic Detection and Imaging 2013: Fiber Optic Sensors and Optical Coherence Tomography, 891412 (29 August 2013); https://doi.org/10.1117/12.2034676

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