@inproceedings{be3fdf9f5f704223aa69a5705586db7f,
title = "High-power high-brightness solar laser approach for renewable Mg recovery from MgO",
abstract = "Hydrogen and heat energy from the reaction of magnesium with water can be used for engines and fuel cells. However, at least 4000 K is necessary for magnesium oxide reduction. Ultra high brightness solar-pumped lasers become essential to make this renewable process technology efficient and economically competitive. 2.3 mg/kJ solar laser - induced magnesium production efficiency has been achieved by T. Yabe et al., in 2012, by focusing a 53 W solar laser beam on a mixture of MgO with Si as reducing agent. This result is however far from the 12.1 mg/kJ attained with 2 kW/mm2 CO2 laser beam. To improve substantially the solar laser - induced Mg production efficiency, a simple high-power, high brightness Nd:YAG solar laser pumping approach is proposed. The solar radiation is both collected and concentrated by four Fresnel lenses, and redirected towards a Nd:YAG laser head by four plane folding mirrors. A fused-silica secondary concentrator is used to compress the highly concentrated solar radiation to a laser rod. Optimum pumping conditions and laser resonator parameters are found through ZEMAX",
keywords = "Fresnel lens, High-brightness, High-power, Laser cavity, Magnesium, MgO, Nd:YAG, Solar-pumped laser",
author = "Joana Almeida and Dawei Liang",
year = "2014",
doi = "10.1117/12.2063442",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE-International Society for Optical Engineering",
editor = "Nogueira, {Rogerio Nunes} and Costa, {Manuel Filipe P. C. Martins}",
booktitle = "Second International Conference on Applications of Optics and Photonics",
note = "2nd International Conference on Applications of Optics and Photonics ; Conference date: 26-05-2014 Through 30-05-2014",
}
