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Pinto, Jl
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Publications (6/6 displayed)
- 2018Optical Fiber Tip Sensor for the Measurement of Glucose Aqueous Solutionscitations
- 2018Glucose measurements with optical fiber sensor based on coreless silica fiber
- 2018Determination of thermo-optic coefficient of ethanol-water mixtures with optical fiber tip sensorcitations
- 2007Plated and intact femur strains in fracture fixation using fiber Bragg gratings and strain gaugescitations
- 2006Determination of setting expansion of dental materials using fibre optical sensingcitations
- 2003Characterization of Bragg Gratings in Normal and Reduced Diameter HiBi Fibers
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article
Optical Fiber Tip Sensor for the Measurement of Glucose Aqueous Solutions
Abstract
A reflective fiber optic sensor based on multimode interference for the measurement of refractive index variations in glucose aqueous solutions is proposed. The sensor is fabricated by splicing a short section of coreless silica fiber to standard single mode fiber. The influence of the coreless fiber dimensions on the sensor performance is analyzed. By changing the sensor length, no significant impact is observed. However, the reduction of the sensing head diameter leads to a large improvement of the sensitivity. The smaller sensor, with a length of 5 mm and a diameter of 24 mu m, presents a maximum sensitivity of 1467.59 nm/RIU, for the refractive index range between 1.364 and 1.397 RIU. Taking into account the acquisition system, a maximum theoretical resolution of 6.8 x 10(-5) RIU is achieved.