Demodulation scheme for fiber Bragg grating sensors based on active control of the spectral response of a wavelength division multiplexer

• Tipo: Artigo em Revista Científica Internacional
• Data: 1998

Autores

Araujo, FM (Autor) Outra; Ferreira, LA (Autor) Outra; Santos, JL (Autor) FCUP; Farahi, F (Autor) Outra

Revista

Título: Applied optics

Vol. 37

Páginas: 7940-7946

ISSN: 0003-6935

Editora: The Optical Society

Indexação

ISI Web of Knowledge - 21 Citações

Scopus - 21 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-001-6K2

DOI: 10.1364/ao.37.007940

Abstract (EN): We present a closed-loop technique for measuring wavelength shifts associated with fiber Bragg gratings by using a fused biconical wavelength division multiplexer (WDM). The spectral response of the WDM is actively tuned by stretching of the coupling region to maintain a fixed coupling ratio at the reflected Bragg wavelength. The closed-loop operation allows sensitivities usually associated with a highly selective WDM to be obtained without compromising the measurement range. A simple theoretical model is presented together with experimental results for temperature and strain measurements. (C) 1998 Optical Society of America.

Idioma: Inglês

Tipo (Avaliação Docente): Científica