Temperature and Strain Sensing With Femtosecond Laser Written Bragg Gratings in Defect and Nondefect Suspended-Silica-Core Fibers

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

Luis Andre Fernandes (Autor) Outra; Martin Becker (Autor) Outra; Orlando Frazao (Autor) FCUP; Kay Schuster (Autor) Outra; Jens Kobelke (Autor) Outra; Manfred Rothhardt (Autor) Outra; Hartmut Bartelt (Autor) Outra; Jose Luis Santos (Autor) FCUP; Paulo V S Marques (Autor) FCUP

Revista

Título: IEEE Photonics Technology Letters

Vol. 24

Páginas: 554-556

ISSN: 1041-1135

Editora: IEEE

Indexação

ISI Web of Knowledge - 16 Citações

Scopus - 20 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia electrotécnica, electrónica e informática

Outras Informações

ID Authenticus: P-002-BSS

DOI: 10.1109/lpt.2012.2183344

Abstract (EN): The spectral behavior in the C-band of fiber Bragg gratings (FBGs) was analyzed as a function of temperature and strain. The FBGs were fabricated in pure silica four-leaf-clover- shaped suspended-core fibers by (DUV) femtosecond laser exposure (3.6 W at 800 nm, 130 fs, 1 kHz frequency tripled to 350 fs, 650 mW at 267 nm). A defect fiber (with a hollow hole in the core) and nondefect fiber were compared both yielding approximate to 1 pm/mu epsilon sensitivity to strain but different sensitivity to temperature (from 3.0 pm/degrees C to 8.4 pm/degrees C for the defect fiber and 10 pm/degrees C for the nondefect fiber). The 16% to 70% relative difference between the thermal coefficients of the two fibers, together with their similar strain sensitivity enables the simultaneous measurement of strain and temperature.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 3