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Proceedings Paper

Refractive index sensor based on terahertz multimode interference fiber device
Author(s): Alice L. S. Cruz; Antonio C. C. Migliano; Marcos A. R. Franco
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Paper Abstract

A fiber-optic refractive index sensor based on terahertz multimode interference in a singlemode-multimode-singlemode fiber structure (SMS) is numerically demonstrated for the first time in the literature. The shift of spectral transmission is investigated as function of external refractive index. Moreover, the coupling efficiency between optical modes at singlemode and multimode sections are determined. The proposed sensor reaches average sensitivity of ~5 GHz/RIU (refractive index unit) over a refractive index range of 1.4-1.5.

Paper Details

Date Published: 20 May 2013
PDF: 4 pages
Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87940L (20 May 2013); doi: 10.1117/12.2025704
Show Author Affiliations
Alice L. S. Cruz, Instituto Tecnológico de Aeronáutica (Brazil)
Antonio C. C. Migliano, Instituto Tecnológico de Aeronáutica (Brazil)
Instituto de Estudos Avançados (Brazil)
Marcos A. R. Franco, Instituto Tecnológico de Aeronáutica (Brazil)
Instituto de Estudos Avançados (Brazil)


Published in SPIE Proceedings Vol. 8794:
Fifth European Workshop on Optical Fibre Sensors
Leszek R. Jaroszewicz, Editor(s)

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