Journal
APPLIED OPTICS
Volume 60, Issue 33, Pages 10377-10382Publisher
Optica Publishing Group
DOI: 10.1364/AO.439995
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Funding
- Fundacao para a Ciencia e a Tecnologia [PTDC/EEI-COM/31527/2017, SAICT-45-2017-POCI-01-0145-FEDER-031527, UID/EEA/50008/201]
- Prefeitura Municipal de Niteroi (PDPA)
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior [001]
- Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro [E-26/202.697/2018]
- Fundação para a Ciência e a Tecnologia [PTDC/EEI-COM/31527/2017] Funding Source: FCT
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The article presents a method for measuring refractive index by reducing the diameter of single-mode optical fibers through a simple, practical, and low-cost mechanical polishing technique.
Etched fiber Bragg gratings (EFBGs) have been widely employed for refractive index (RI) measurements that can be used to monitor sugar consumption during the fermentation of alcoholic beverages. EFBGs are obtained by removing the cladding of a fiber Bragg grating, which is traditionally performed by a chemical attack with hydrogen fluoride, an extremely hazardous corrosive substance that causes severe wounds and even death. To overcome such drawbacks, this technical note presents a simple, practical, and low cost method for the diameter reduction of single mode optical fibers by mechanical polishing, employing a small scale computer numerical control device and an ad hoc 3D-printed rod. The sensor probe obtained was tested using sucrose aqueous solutions with RIs between 1.333 and 1.394, measured in an Abbe refractometer. The results show a linear shift of the Bragg wavelength with respect to RI with a correlation of 0.928. (C) 2021 Optical Society of America
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