Erbium doped optical fiber lasers for magnetic field sensing

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2015

Autores

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

Ata de Conferência Internacional

Título: 24TH INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS

24th International Conference on Optical Fibre Sensors (OFS)

Curitiba, BRAZIL, SEP 28-OCT 02, 2015

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 1 Citação

Outras Informações

ID Authenticus: P-00G-TKR

DOI: 10.1117/12.2195073

Abstract (EN): In this work two erbium doped optical fiber laser configurations for magnetic field measurement are implemented and compared. The first laser is set-up in a loop configuration and requires only a single FBG (Fiber Bragg Grating), acting as mirror. A second laser employs a simpler linear cavity configuration but requires two FBGs with spectral overlap to form the laser cavity. A bulk magnetostrictive material made of Terfenol-D is attached to the laser FBGs enabling modulation of its operation wavelength by the magnetic field. Moreover, a passive interferometer was developed to demodulate the AC magnetic field information where the corresponding demodulation algorithms were software based. Both configurations are tested and compared with the results showing different sensitivities and resolutions. Better performance was accomplished with the double FBGs linear cavity configuration with a resolution of 0.05 mTRMS in the range of 8 to 16 mTRMS. For the same range the loop configuration attained a resolution of 0.48 mT(RMS).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4