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Araujo, F.
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Publications (4/4 displayed)
- 2017EVALUATION OF SURFACE ROUGHNESS OF DENTAL COMPOSITES SUBJECT TO DIFFERENT METHODS OF FINISHING AND POLISHING
- 2010Fibre Optic Hot-Wire Flowmeter Based on a Metallic Coated Hybrid LPG-FBG Structurecitations
- 2009Effect of fiber tapering in LPG-based Mach-Zehnder modal interferometers for refractive-index sensingcitations
- 2008Modal LPG-based Mach-Zehnder interferometer with controlled sensitivity for refractive index measurement
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Modal LPG-based Mach-Zehnder interferometer with controlled sensitivity for refractive index measurement
Abstract
In this work, an LPG-based Mach-Zehnder interferometer was evaluated as a sensing structure for environmental refractive index measurement. To interrogate this sensing device, coherence addressing and pseudo-heterodyne processing were used. The impact of stretching, bending and twisting the interferometer on the sensitivity to refractive index changes r was studied. It is shown that, due to the antisymmetric nature of cladding modes in arc-induced LPGs, it is possible to tune the system sensitivity by simple mechanical action.