In-line temperature-compensated vector magnetic field sensor with side-polished fiber

A novel, to the best of our knowledge, vector magnetic field sensor with temperature compensation is proposed and investigated. The proposed sensor is realized by side pol-ishing a multi-mode optical fiber and adopting the surface plasmon resonance (SPR) effect. The side-polished surface is coated with a magnetic fluid (MF) and polydimethylsiloxane (PDMS) successively along the fiber axis. The as-fabricated sensor can be used not only for magnetic field strength and direction sensing, but also for temperature detection. The achieved magnetic field intensity sensitivities are 1720 pm/mT (90 degrees direction) and -710 pm/mT (0 degrees direction), and the temperature sensitivity is -2070 pm/degrees C. On top of its temperature compensation ability, the easy fabrication and very high sensitivity of the proposed sensor are attractive features for vector magnetic field sensing applications. (c) 2023 Optica Publishing Group

Automated summary

A novel vector magnetic field sensor with temperature compensation is proposed and investigated in this study. The sensor is realized by side-polishing a multi-mode optical fiber and adopting the surface plasmon resonance effect. It can be used for magnetic field strength and direction sensing, as well as temperature detection. The sensor exhibits easy fabrication, high sensitivity, and temperature compensation ability.