| 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
Stress Induced Birefringence of Glass-to-Metal Ultrashort Pulse Welded Components
Abstract
Ultrashort pulse laser welding of dissimilar materials is an attractive alternative to the currently-used adhesive bonding of glass-to-metal components e.g. in the fabrication of lasers and optical systems. Adhesive bonding can suffer from performance and reliability issues such as outgassing, creep and degradation with age. The bonding process can also be labour intensive to ensure consistent deposition and curing of the adhesive. Although interest in ultrashort pulse laser welding as a viable bonding method has been gaining momentum [1,2], it is important to quantify the impact of any stress induced by the bonding process on the optical performance of the component being bonded. We therefore developed a polariscope for stress field analysis of 10 mm BK7 glass cubes bonded to 15 mm x 15 mm x 5 mm aluminium coupons using the Patterson and Wang 6-step method [3] to calculate the stress induced retardation present in the samples. We have applied this measurement system and analysis technique both to laser-bonded samples, and to samples adhesively bonded with a standard approach used in industry. The results of this analysis will be presented in terms of ISO Standard for stress birefringence in optics [4]. It was observed that ultrashort pulse laser welding results in a low level of stress induced birefringence within an 85% optical aperture of the 10 mm cube. These levels are suitable for use in photography and microscopy applications as defined by the relevant ISO standard for permissible stress induced birefringence limits in optics. The welds were compared to adhesively bonded and hydroxide catalysis bonded samples.[1] R. Carter, M. Troughton, J. Chen, I. Elder, R. R. Thomson, M. J. D. Esser, R. A. Lamb, & D. P. Hand,(2017), Towards industrial ultrafast laser microwelding: SiO2 and BK7 to aluminum alloy, Applied Optics, 56, 16, 4873-4881. [2] R. Carter, (2019). UltraWELD: A new method for welding glass and metal. Abstract from Made For Space, Coventry, United Kingdom. [3] E. A. Patterson and Z. F. Wang (1991), Towards full field automated photoelastic analysis of complex components, Strain, 27, 49–53. [4] "ISO 10110-2:1996 - Optics and optical instruments -- Preparation of drawings for optical elements and systems -- Part 2: Material imperfections -- Stress birefringence," https://www.iso.org/standard/18089.html.