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Opt Lett. 2009 Aug 15;34(16):2474-6.

Fabry-Perot refractometer based on an end-of-fiber polymer tip.

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  • 1INESC Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal.


A micrometric Fabry-Perot refractometer based on an end-of-fiber polymer tip is proposed. The fiber tip, with a length of 36 mum, was fabricated by self-guiding photopolymerization. The two-wave interferometric operation was achieved by combining the light waves generated at the interface between the single-mode fiber and the polymer tip, and at the fiber tip end (Fresnel reflection). The Fabry-Perot interferometer is coherence addressed and heterodyne interrogated, resulting into a liquid refractive index resolution of approximately 7.5x10(-4).

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