5 May 2015 Magnetic field measurement using a fiber laser sensor in ring arrangement
Author Affiliations +
In this work an optical fiber laser with loop configuration was developed for magnetic field measurement. The transducer element is an FBG written in a HiBi fiber whose wavelength is modified using a magnetostrictive material that applies deformation in the presence of the magnetic field. The laser has a bandwidth of 450 MHz and operates in single polarization. A shift of 258.5 pm was observed in the laser operating wavelength for a magnetic field of 17.85 mT. Moreover, a maximum sensitivity of 14.72 pm/mT in the linear regime operation was achieved when increasing the magnetic field. The system provides a narrow emission line that is dependent on the magnetic field magnitude enabling high resolution interferometric measurement schemes. The laser response to AC magnetic fields was also characterized using a passive interferometer with higher sensitivity in the range of 8.32 to 17.93 mTRMS.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
I. M. Nascimento, I. M. Nascimento, J. M. Baptista, J. M. Baptista, P. A. S. Jorge, P. A. S. Jorge, J. L. Cruz , J. L. Cruz , M. V. Andrés, M. V. Andrés, } "Magnetic field measurement using a fiber laser sensor in ring arrangement", Proc. SPIE 9506, Optical Sensors 2015, 95061M (5 May 2015); doi: 10.1117/12.2182644; https://doi.org/10.1117/12.2182644

Back to Top