Agradecimentos: Fundação de Amparo à Pesquisa do Estado de São Paulo (2017/25666-2, 2018/10409-7); Conselho Nacional de Desenvolvimento Científico e Tecnológico; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (001); Australian Research Council (CE149100003); Australian National...

Agradecimentos: Fundação de Amparo à Pesquisa do Estado de São Paulo (2017/25666-2, 2018/10409-7); Conselho Nacional de Desenvolvimento Científico e Tecnológico; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (001); Australian Research Council (CE149100003); Australian National Fabrication Facility; University of Adelaide (Ramsay Fellowship). This work in this Letter was performed in part at the Specialty Optical Fibers Laboratory at UNICAMP and in part at the OptoFab node of the Australian National Fabrication Facility (ANFF). The authors thank Evan Johnson and Alastair Dowler from the University of Adelaide for their technical support

Abstract: The inception of photonic crystal fibers (PCFs) allowed for unprecedented tailoring of waveguide properties for specialty sensing probes. Exposed core microstructured fibers (ECFs) represent a natural evolution of the PCF design for practical liquid and gas sensing. Until now, to the best...

Abstract: The inception of photonic crystal fibers (PCFs) allowed for unprecedented tailoring of waveguide properties for specialty sensing probes. Exposed core microstructured fibers (ECFs) represent a natural evolution of the PCF design for practical liquid and gas sensing. Until now, to the best of our knowledge, only single-mode or few-modes ECFs have been explored. In this Letter, we demonstrate a highly multimode ECF with a lateral access that extends throughout the whole length of the fiber. The ECF is operated as a fiber specklegram sensor for assessing properties of fluids and interrogated using a simple and low-cost setup. The probe exhibits a refractive index resolution and sensitivity of at least 4.6 x 10(-4) refractive index units (RIUs) and -10.97 RIU-1, respectively. A maximum temperature resolution up to 0.017 degrees C with a -0.20 degrees C-1 temperature sensitivity over the 23 degrees C-28 degrees C range and a liquid level sensing resolution up to 0.12 mm with -0.015 mm(-1) sensitivity over the 0.0-50.0 mm bathed the length range in water

FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP

2017/25666-2; 2018/10409-7

CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ

COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES

001

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