Fibre Optic Hot-Wire Flowmeter Based on a Metallic Coated Hybrid LPG-FBG Structure

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2010

Autores

Caldas, P (Autor) Outra; Jorge, PAS (Autor) FCUP; Rego, G (Autor) Outra; Frazao, O (Autor) FCUP; Santos, JL (Autor) FCUP; Ferreira, LA (Autor) Outra; Araujo, F (Autor) Outra

Ata de Conferência Internacional

Título: FOURTH EUROPEAN WORKSHOP ON OPTICAL FIBRE SENSORS

Fourth European Workshop on Optical Fibre Sensors

Porto, PORTUGAL, SEP 08-10, 2010

Indexação

ISI Web of Knowledge - 1 Citação

ISI Web of Science

Scopus - 3 Citações

Classificação Científica

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

Outras Informações

ID Authenticus: P-003-AZG

DOI: 10.1117/12.866463

Abstract (EN): In this work an all optical hot-wire flowmeter based on a silver coated fibre incorporating a long period grating and a Bragg grating is demonstrated. Optical energy at 1480 nm propagating down the fibre is coupled by the long period grating into the fibre cladding and absorbed by the metallic coating deposited on the fibre surface over the Bragg grating position. This absorption acts like a hot-wire raising locally the fibre temperature, which is effectively detected by the FBG resonance shift. The temperature raise depends on the flow speed of the surrounding air that has the effect to cool the fibre. In this way, the FBG Bragg wavelength shift can be related with the flow speed. Results obtained demonstrate the working principle and a flow speed resolution of 0.08 m/s is demonstrated.

Idioma: Inglês

Tipo (Avaliação Docente): Científica