Salt-Doped Agar-Based Optical Fibers for Electric Current Sensing

Autor(es)

Rosa, Lidia O. ; Cordeiro, Cristiano M. B. ; Fujiwara, Eric

• Tipo de documento: Artigo Científico
• Fonte: 2024 LATIN AMERICAN WORKSHOP ON OPTICAL FIBER SENSORS, LAWOFS 2024; v. N/A, p. 2-pg., 2024-01-01.

Resumo

This work reports an agar-made, biodegradable optical fiber for electric current measurements. The agar's mineral impurities sustain the charges' flow through the fiber structure, causing refractive index modulation by thermo-optic effect. Moreover, doping the agar solution with NaCl improves the electrical conductivity and sensitivity. We interrogate the sensor response by specklegram analysis, yielding a time-constant reduction in the decaying correlation coefficient curves as the current magnitude increases. Furthermore, oscillations in the speckle pattern manifest for exceeding currents, possibly due to the formation of a dielectric layer within the fiber structure. (AU)

• Processo FAPESP: 23/09181-0 - Desenvolvimento de fibras ópticas biodegradáveis de ágar para sensoriamento
• Beneficiário: Eric Fujiwara
• Modalidade de apoio: Auxílio à Pesquisa - Regular