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Sensors 2007, 7(11), 2492-2498; doi:10.3390/s7112492

Refractive Index Measurement within a Photonic Crystal Fibre Based on Short Wavelength Diffraction

1
School of Chemistry & Optical Fibre Technology Centre, University of Sydney, 206 National Innovation Centre, ATP, Sydney, NSW 1430, Australia
2
School of Electrical and Information Engineering, University of Sydney, NSW 2006, Australia
3
Department of Physics and Astronomy and Interdisciplinary Nanoscience Center (iNANO), University of Aarhus, Ny Munkegade, Building 1520, DK-8000 Århus C, Denmark
4
School of Physics, University of Sydney, NSW 2006, Australia
*
Author to whom correspondence should be addressed.
Received: 18 September 2007 / Accepted: 22 October 2007 / Published: 30 October 2007
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Abstract

A new class of refractive index sensors using solid core photonic crystal fibres isdemonstrated. Coherent scattering at the cladding lattice is used to optically characterizematerials inserted into the fibre holes. The liquid to solid phase transition of water uponfreezing to ice 1h is characterized by determining the refractive index.
Keywords: optical fibre sensors; gratings; diffraction; photonic crystal fibres; microstructured fibres; capillary; ice. optical fibre sensors; gratings; diffraction; photonic crystal fibres; microstructured fibres; capillary; ice.
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Martelli, C.; Canning, J.; Kristensen, M.; Groothoff, N. Refractive Index Measurement within a Photonic Crystal Fibre Based on Short Wavelength Diffraction. Sensors 2007, 7, 2492-2498.

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