Optical Fiber Specklegram Sensors for Measurement of Liquids

Autor(es)

Fujiwara, Eric ; Cabral, Thiago D. ; Cordeiro, Cristiano M. B. ; IEEE

• Tipo de documento: Artigo Científico
• Fonte: 2019 SBFOTON INTERNATIONAL OPTICS AND PHOTONICS CONFERENCE (SBFOTON IOPC); v. N/A, p. 5-pg., 2019-01-01.

Resumo

Optical fiber specklegram sensors explore the spatiotemporal properties of the speckle pattern projected from a multimode fiber due to the interference between the several propagating modes. Albeit their apparent noisy nature, the speckle fields carry detailed and reproducible information about the fiber status. Specklegram changes can be analyzed to obtain very sensitive measurements with simple interrogation schemes. In this paper, different setups of fiber specklegram sensors for assessing the physical and chemical properties of liquids, such as refractive index, viscosity, and evaporation rate, are presented. The experiments are carried out using both silica multimode fibers and structured waveguides, whereas the output speckle fields are processed by means of correlation and image processing techniques. (AU)

• Processo FAPESP: 17/25666-2 - Desenvolvimento de sensor de fibra óptica para medição de sinais de miografia de força aplicado a interfaces humano-robô
• Beneficiário: Eric Fujiwara
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/50632-6 - Sensores baseados em ressonância de plasmon e fibras ópticas microestruturadas
• Beneficiário: Cristiano Monteiro de Barros Cordeiro
• Modalidade de apoio: Auxílio à Pesquisa - Regular