Low cost plastic optical fiber sensor based on surface plasmon resonance
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AuthorMuñoz Berti, Víctor Manuel; López Pérez, Ana Cristina; Alén, Benito; Costa Krämer, José Luis; García Martín, Antonio; Lomer Barboza, Mauro Matías; López Higuera, José Miguel
Surface plasmon excitation using a variation of Kretschmann method based on light guiding through an optical fiber has been extensively studied in the literature. But, due to its particularly bad propagation conditions, plastic optical fiber was not taken into account in documented experiments. We propose a low cost sensor using this type of fiber, in which we try to avoid the problems both through careful design and signal processing. First of all we discuss the sample fabrication and measurement in section 2; then the results obtained are discussed in section 3, including the problems faced because of the multimode character of the fiber, for which we propose alternative sample shapes as a mean of reducing them. As a conclusion we propose a roadmap to design a low cost sensor based in the structures studied in this paper.
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