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Multi-Fresnel lenses pumping approach for improving high-power Nd:YAG solar laser beam quality
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Resumo(s)
To significantly improve the present-day high-power solar laser beam quality, a three-stage multi- Fresnel lenses approach is proposed for side-pumping either a Nd:YAG single-crystal or a core-doped Sm3+ Nd:YAG ceramic rod. Optimum pumping and laser beam parameters are found through ZEMAX and LASCAD numerical analysis. The proposed scheme offers a uniform absorption profile along the rod. 167 W laser power can be achieved, corresponding to 29.3 W/m2 collection efficiency. High brightness figure of merit of 8.34 W is expected for the core-doped rod within a convex-concave resonator, which is 1300 times higher than that of the most-recent high-power solar laser.
Descrição
These research projects (PTDC/FIS/103599/2008 and PTDC/FIS/122420/2010) were funded by the Science and Technology Foundation of Portuguese Ministry of Science, Technology and Higher Education (FCT-MCTES).
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Atomic and Molecular Physics, and Optics Engineering (miscellaneous) Electrical and Electronic Engineering