Demodulation of fiber Bragg grating sensors based on dynamic tuning of a multimode laser diode

• Tipo: Artigo em Revista Científica Internacional
• Data: 1999

Autores

Ferreira, LA (Autor) Outra; Diatzikis, EV (Autor) Outra; Santos, JL (Autor) FCUP; Farahi, F (Autor) Outra

Revista

Título: Applied Optics

Vol. 38

Páginas: 4751-4759

ISSN: 1559-128X

Editora: Optical Society of America

Indexação

ISI Web of Knowledge - 23 Citações

Scopus - 26 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-001-3P3

DOI: 10.1364/ao.38.004751

Abstract (EN): Dither demodulation of fiber Bragg grating sensors illuminated with multimode light from laser diodes is theoretically and experimentally investigated. Quasi-static temperature and strain sensitivities of 0.09 degrees C/root Hz and 0.6 mu epsilon/root Hz are obtained. We show that it is possible to measure small ac signals that lie outside the feedback loop bandwidth by using a synchronous detection referenced to twice the dither frequency. In this situation, dynamic strain sensitivity of 3.3 n epsilon/root Hz is achieved. (C) 1999 Optical Society of America.

Idioma: Inglês

Tipo (Avaliação Docente): Científica