Refractive index sensor based on terahertz multimode interference fiber device

Alice L. S. Cruz; Antonio C. C. Migliano; Marcos A. R. Franco

doi:10.1117/12.2025704

20 May 2013 Refractive index sensor based on terahertz multimode interference fiber device

Alice L. S. Cruz, Antonio C. C. Migliano, Marcos A. R. Franco

Proceedings Volume 8794, Fifth European Workshop on Optical Fibre Sensors; 87940L (2013) https://doi.org/10.1117/12.2025704
Event: Fifth European Workshop on Optical Fibre Sensors, 2013, Krakow, Poland

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.

Citation Download Citation

Alice L. S. Cruz, Antonio C. C. Migliano, and Marcos A. R. Franco "Refractive index sensor based on terahertz multimode interference fiber device", Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87940L (20 May 2013); https://doi.org/10.1117/12.2025704

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