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Type: Artigo de periódico
Title: Multimode Interference Tapered Fiber Refractive Index Sensors
Author: Biazoli C.R.
Silva S.
Franco M.A.R.
Frazao O.
Cordeiro C.M.B.
Abstract: Real-time monitoring of the fabrication process of tapering down a multimode-interference-based fiber structure is presented. The device is composed of a pure silica multimode fiber (MMF) with an initial 125 μmdiameter spliced between two single-mode fibers. The process allows a thin MMF with adjustable parameters to obtain a high signal transmittance, arising from constructive interference among the guided modes at the output end of the MMF. Tapered structures with waist diameters as low as 55 μm were easily fabricated without the limitation of fragile splices or difficulty in controlling lateral fiber alignments. The sensing device is shown to be sensitive to the external environment, and a maximum sensitivity of 2946 nm/ refractive index unit in the refractive index range of 1.42-1.43 was attained. © 2012 Optical Society of America.
Editor: Optical Society of American (OSA)
Rights: fechado
Identifier DOI: 10.1364/AO.51.005941
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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