Refractive index sensing using a multimode interference-based fiber sensor in a cavity ring-down system

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2017

Autores

Susana Silva (Autor) FCUP; Frazao, O (Autor) FCUP

Ata de Conferência Internacional

Título: 2017 25TH INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS (OFS)

25th International Conference on Optical Fibre Sensors (OFS)

SOUTH KOREA, APR 24-28, 2017

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 2 Citações

Outras Informações

ID Authenticus: P-00M-SZK

DOI: 10.1117/12.2263437

Abstract (EN): This work presents a multimode interference-based fiber sensor in a cavity ring-down system for sensing temperature-induced refractive index (RI) changes of water. The sensing head is based in multimodal interference (MMI) and it was placed inside the fiber loop cavity of the CRD system. A modulated laser source was used to send pulses down into the fiber loop cavity and an erbium-doped fiber amplifier (EDFA) was placed in the fiber ring to provide an observable signal with a reasonable decay time. The behavior of the sensing head to temperature was studied due to its intrinsic sensitivity to said parameter - a sensitivity of -1.6 10(-9) s/C was attained. This allowed eliminating the temperature component from RI measurement of water and a linear sensitivity of 580 mu s/RIU in the RI range of 1.324-1.331 was obtained.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4