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Proceedings Paper

Spectral bandwidth analysis of high sensitivity refractive index sensor based on multimode interference fiber device
Author(s): Edwin G. P. Pachon; Marcos A. R. Franco; Cristiano M. B. Cordeiro
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Paper Abstract

Fiber optic structures based on multimode interference were investigated to the refractive index (RI) sensing. The proposed device is a singlemode-multimode-singlemode (SMS) structure, where the multimode section is a coreless fiber (MMF). The numerical analyses were carried out by beam propagation and modal expansion methods. Ultra-high sensitivity was obtained: 827 nm/RIU over a RI range of 1.30-1.44 and a maximum sensitivity of 3500 nm/RIU for RI~1.43, considering ▵RI = 0.01. The dependence of spectral bandwidth was investigated taking into account the multimode fiber diameter and the coupling efficiency between modes at the input junction singlemode-multimode.

Paper Details

Date Published: 7 November 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84217Q (7 November 2012); doi: 10.1117/12.969928
Show Author Affiliations
Edwin G. P. Pachon, IFGW, UNICAMP (Brazil)
Marcos A. R. Franco, Instituto de Estudos Avançados (Brazil)
Instituto Tecnologico de Aeronautica (Brazil)
Cristiano M. B. Cordeiro, IFGW, UNICAMP (Brazil)

Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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