Effect of fiber tapering in LPG-based Mach-Zehnder modal interferometers for refractive-index sensing

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2009

Autores

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

Ata de Conferência Internacional

Título: Proceedings of SPIE - The International Society for Optical Engineering

20th International Conference on Optical Fibre Sensors

Edinburgh, 5 October 2009 through 9 October 2009

Indexação

ISI Web of Knowledge

Scopus - 6 Citações

Outras Informações

ID Authenticus: P-007-REX

DOI: 10.1117/12.834951

Abstract (EN): In this work, an LPG-based Mach-Zehnder modal interferometer with a tapered fiber section between the two LPGs is studied as a sensing structure for measuring environmental refractive index. To interrogate this sensing device, coherence addressing and pseudo-heterodyne processing were used. A fiber taper was made between the two LPGs to improve and tailor the sensitivity of the sensor. Experimental results show that the sensitivity to external refractive index increases with the length of the taper and that the sensitivity enhancement is stronger for lower order cladding modes. © 2009 SPIE.

Idioma: Inglês

Tipo (Avaliação Docente): Científica