Dr. Ivan Melo Profile

Dr. Ivan Melo

at Univ of Žilina

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Proceedings Article | 31 May 2023 Poster + Paper

Optical fiber-based probe for detection of magnetic field

Norbert Tarjányi, Ivan Melo, Daniel Kácik

Proceedings Volume 12572, 125721C (2023) https://doi.org/10.1117/12.2665538

KEYWORDS: Magnetism, Optical fibers, Polarizers, Polarization, Spectrum analysis, Spectral density, Birefringence, Sensors

Read Abstract +

In the contribution, we present the design of a probe responding to the presence of a magnetic field, consisting of a capillary fiber filled with magnetic fluid and connected to polarization-maintaining optical fibers on both sides. Magnetic fluid in the capillary responds to a transverse magnetic field by changing its birefringence. As a result, there is a change in the polarization state of the optical wave passing through the fluid in the capillary, and this change is registered using an optical fiber plane polarizer placed between the fiber coming out of the capillary and the optical spectrum analyzer. A relationship between the magnitude of the magnetic field flux density and the spectral change of the signal detected by the optical spectrum analyzer is observed. The result indicates a strong potential of a magnetic fluid in the field of the optical fiber sensors of magnetic fields

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