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Proceedings Paper

Multimodal interference based on large-core air-clad photonic crystal fibres for simultaneous measurement of multiparameters
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Paper Abstract

This work describes a large-core air-clad photonic crystal fibre-based sensing structure that is sensitive to refractive index, temperature and strain. The sensing head is based on multimodal interference, and relies on a single mode - largecore air-clad photonic crystal fibre - single mode fibre configuration. Using two distinct large-core air-clad PCF geometries it is possible to obtain an optical spectrum with two dominant loss bands, at wavelengths that have different sensitivities to physical parameters. This characteristic is explored to demonstrate a sensing head that permits the straintemperature discrimination functionality. It is also shown the large-core air-clad photonic crystal fibre can be applied to implement a sensing head sensitive to the water refractive index changes induced by temperature variations.

Paper Details

Date Published: 17 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77534A (17 May 2011); doi: 10.1117/12.885999
Show Author Affiliations
Susana Silva, INESC Porto (Portugal)
Univ. do Porto (Portugal)
J. L. Santos, INESC Porto (Portugal)
Univ. do Porto (Portugal)
F. X. Malcata, Instituto Superior da Maia (Portugal)
Ctr. Interdisciplinar Investigação Marinha e Ambiental (Portugal)
Jens Kobelke, IPHT Jena (Germany)
Kay Schuster, IPHT Jena (Germany)
O. Frazão, INESC Porto (Portugal)


Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors
Jacques Albert; Wojtek J. Bock, Editor(s)

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