Intensity-Modulated Optical Fiber Sensor for AC Magnetic Field Detection

• Tipo: Artigo em Revista Científica Internacional
• Data: 2015

Autores

Nascimento, IM (Autor) Outra; Baptista, JM (Autor) Outra; Jorge, PAS (Autor) FCUP; Cruz, JL (Autor) Outra; Andres, MV (Autor) Outra

Revista

Título: IEEE Photonics Technology Letters

Vol. 27

Páginas: 2461-2464

ISSN: 1041-1135

Editora: IEEE

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-00G-Q2S

DOI: 10.1109/lpt.2015.2470135

Abstract (EN): An erbium-doped (Er3+) fiber optic laser is proposed for sensing alternated magnetic fields by measuring the laser intensity modulation. The sensor is fabricated using two partially overlapped narrow-band fiber Bragg gratings (FBGs) and a section of doped fiber in a Fabry-Perot configuration. Laser power stability and bandwidth are studied while changing the overlap. A bulk rod of TbDyFe, a magnetostrictive material, is glued to both the FBGs and the laser wavelength and power are modulated according to the magnetic field. Acquisition and processing are done using virtual instrumentation. Results have shown the possibility of detecting 11.18 mu T-rms/root Hz for an alternating magnetic field of 4.17 mT(rms).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4