Magnetic field measurement using a fiber laser sensor in ring arrangement

• Type: Article in International Conference Proceedings Book
• Date: 2015

Authors

Nascimento, IM (Author) Other; Baptista, JM (Author) Other; Jorge, PAS (Author) FCUP; Cruz, JL (Author) Other; Andres, MV (Author) Other

Conference proceedings International

Title: OPTICAL SENSORS 2015

Conference on Optical Sensors

Prague, CZECH REPUBLIC, APR 13-16, 2015

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 1 Citation

Other information

Authenticus ID: P-00G-CGB

DOI: 10.1117/12.2182644

Abstract (EN): 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 mT(RMS).

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6