| People | Locations | Statistics |
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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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Maier, Rrj
Heriot-Watt University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (24/24 displayed)
- 2021Enhanced fiber mounting and etching technique for optimized optical power transmission at critical cladding thickness for fiber-sensing applicationcitations
- 2020Dynamics rate of fiber chemical etchingcitations
- 2018Laser-based fabrication of microfluidic devices for porous media applicationscitations
- 2018Rapid Laser Manufacturing of Microfluidic Devices from Glass Substratescitations
- 2017Fabrication of three-dimensional micro-structures in glass by picosecond laser micro-machining and welding
- 2017An open-architecture metal powder bed fusion system for in-situ process measurementscitations
- 2017Integrating fiber Fabry-Perot cavity sensor into 3-D printed metal components for extreme high-temperature monitoring applicationscitations
- 2016Laser polishing - Enhancing surface quality of additively manufactured cobalt chrome and titanium components
- 2016Embedding fibre optical sensors into SLM parts
- 2016Stainless steel component with compressed fiber Bragg grating for high temperature sensing applicationscitations
- 2015Measuring residual stresses in metallic components manufactured with fibre bragg gratings embedded by selective laser meltingcitations
- 2015SS316 structure fabricated by selective laser melting and integrated with strain isolated optical fiber high temperature sensorcitations
- 2015In-situ strain sensing with fiber optic sensors embedded into stainless steel 316citations
- 2014In-situ measurements with fibre bragg gratings embedded in stainless steelcitations
- 2013Flexible delivery of Er:YAG radiation at 2.94 µm with negative curvature silica glass fiberscitations
- 2013Embedding optical fibers into stainless steel using laser additive manufacturing
- 2013Embedded fibre optic sensors within additive layer manufactured componentscitations
- 2013Embedding metallic jacketed fused silica fibres into stainless steel using additive layer manufacturing technologycitations
- 2012Laser precision surface sculpting of 2D diffractive optical structures on metals
- 2012Modelling of Long Period Gratings with Metallic (Pd) Jacket
- 2011Micro-sculpting of diffractive scales on metal surfaces for optical position encoders, the 'YAGboss' process
- 2009All Fibre based Hydrogen Sensing using Palladium coated Long Period Gratings
- 2005Single-mode mid-IR guidance in a hollow-core photonic crystal fibercitations
- 2004Temperature dependence of the stress response of fibre Bragg gratingscitations
Places of action
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document
All Fibre based Hydrogen Sensing using Palladium coated Long Period Gratings
Abstract
All optical hydrogen detection techniques are required to provide a safe and potentially compact monitoring system for use with existing and future hydrogen technologies.Reversible chemochromic changes induced in a palladium thin film, following hydrogen absorption, provide a mechanism for an optical detection of hydrogen.<br/>Long period gratings [LPGs], written into standard communications type optical fibres exhibit absorption bands with the spectral positions being sensitive to changes in the refractive index contrast at the cladding – free space (or sensor layer) interface.<br/>Optical parameters such as the refractive index of a thin, (~40nm) palladium coating deposited onto the outside of a fibre at the location of a LPG are shown to be sensitive to the hydrogen absorption in palladium.<br/>We demonstrate a measurable wavelength shift in the position of the LPG lossband when exposed to low (150-10000ppm) concentrations of hydrogen.The dependency of the absorption shift with the optical properties of thin film palladium is explored.Leading to the characterisation of the optical properties of thin film palladium on exposition to hydrogen, through a combination of ellipsometry and surface plasmon resonance.The theoretical response of palladium coated LPGs are explored demonstrating maxim response to hydrogen for certain LPG-Pd combinations .<br/>Initial data for the effect of long term drift and temperature-age interdependence is presented demonstrating match to expected results.<br/>