resumo
In this work, we periodically modulate the diameter of a single-mode fiber (SMF) through simple procedures, namely, through the periodic deposition of photopolymerizable resin onto the surface of an SMF, followed by chemical corrosion in hydrofluoric acid. When subjecting the structure to an external load, a periodic refractive index modulation occurs along the fiber length, allowing the occurrence of attenuation dips in the transmission spectrum. The structure was characterized by displacement, longitudinal strain, and temperature, revealing promising capabilities, namely, a measurement range of 0-60 mm, for the displacement, which is 30 times larger than the one reported in the literature; showing the capability to measure strain with intensity detection schemes, showing low wavelength drift, which makes it promising for low-cost intensity detection schemes; and being also able to measure temperature through wavelength detection schemes.
palavras-chave
GRATINGS; SENSOR; TORSION; FABRICATION
categoria
Engineering; Instruments & Instrumentation; Physics
autores
Valente, NF; Figueira, F; Bilro, L; Oliveira, R
nossos autores
Flávio Alberto da Silva Figueira
Investigador Júnioragradecimentos
This work was supported in part by the Fundacao para a Ciencia e Tecnologia (FCT) and Fundo Europeu de Desenvolvimento Regional (FEDER) funds through the COMPETE 2020 Programme under Project UIDB/50008/2020-UIDP/50008/2020 and in part by the FCT/Ministerio da Educacao e da Ciencia (MEC) under Project PTDC/EEI-TEL/1511/2020. The work of Flavio Figueira was supported by the National Funds (OE), through FCT, under Contract REF-168-89-ARH/2018, in the scope of the framework contract foreseen in nos. 4, 5, and 6 of article 23 of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19. The work of Ricardo Oliveira was supported by the FCT under Contract CEECIND2021.01066. The associate editor coordinating the review of this article and approving it for publication was Dr. Xuehao Hu.