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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Araujo, Fm
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Topics
Publications (10/10 displayed)
- 2012Intrinsic Fabry-Perot Cavity Sensor Based on Etched Multimode Graded Index Fiber for Strain and Temperature Measurementcitations
- 2010Splicing and coupling losses in hollow-core photonic crystal glass fiberscitations
- 2010Intrinsic Fabry-Perot cavity sensor based on chemical etching of a multimode graded index fiber spliced to a single mode fibercitations
- 2009Modal Interferometer Based on ARROW Fiber for Strain and Temperature Measurementcitations
- 2009Geometrical effects on the refractive index sensitivity of Mach-Zehnder fibre modal interferometers based on long-period gratingscitations
- 2005Strain and temperature discrimination using a Hi-Bi grating partially exposed to chemical etchingcitations
- 2005Intensity-referenced and temperature-independent curvature-sensing concept based on chirped fiber Bragg gratingscitations
- 2004Intensity-referenced temperature-independent curvature sensing concept based on chirped gratings embedded in a composite laminatecitations
- 2003Load cell for structural monitoring based on a microbend self-referenced fiber optic intensity sensor
- 2001Smart composite for monitoring of structure
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article
Geometrical effects on the refractive index sensitivity of Mach-Zehnder fibre modal interferometers based on long-period gratings
Abstract
In this work a modal interferometer based on arc-induced long-period gratings (LPGs) in a Mach-Zehnder configuration is evaluated as a sensing structure for environmental refractive index measurement. To interrogate this sensing device, coherence addressing and pseudo-heterodyne processing were used. The influence of geometric effects such as stretching, bending and twisting the interferometer on the sensitivity to refractive index changes 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 to external refractive index by simple mechanical action. The experimental results show that it is possible to tune the sensitivity to external refractive index by more than 50% by control of the curvature in the Mach-Zehnder interferometer.