| 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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Carter, Richard
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2024Ultra-short pulsed laser welding of crystals, glasses, metals, and more
- 20233D Laser Beam Shaping for Manufacturing within Volumes
- 2023Industrial ultrashort pulsed laser welding of copper and titanium to quartz and glass components for optical applications
- 2023Laser surface texturing of structural components for residual stress alleviation during ultrashort pulsed laser welding
- 2021Stress Induced Birefringence of Glass-to-Metal Ultrashort Pulse Welded Components
- 2019High yield ultrafast laser microwelding process for direct joining of metal-to-glass
- 2018Laser-based fabrication of microfluidic devices for porous media applicationscitations
- 2018Rapid Laser Manufacturing of Microfluidic Devices from Glass Substratescitations
- 2017Towards industrial ultrafast laser microwelding: SiO2 and BK7 to aluminum alloycitations
- 2017Fabrication of three-dimensional micro-structures in glass by picosecond laser micro-machining and welding
- 2016Characterisation of weld zone reactions in dissimilar glass-to-aluminium pulsed picosecond laser weldscitations
- 2016Picosecond laser welding of optical to structural materials
- 2016Surface Separation Investigation of Ultrafast Pulsed Laser Welding
- 2014Picosecond laser welding of similar and dissimilar materialscitations
- 2012Modelling of Long Period Gratings with Metallic (Pd) Jacket
- 2009All Fibre based Hydrogen Sensing using Palladium coated Long Period Gratings
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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/>