Abstract
A compact side-pumped solar laser design is proposed to improve the TEM00-mode solar laser output performance substantially. A double-stage secondary concentrator was composed of a rectangular hollow pipe and a 2V-shaped dry pump cavity, which couples and redistributes the concentrated solar radiation from the focal zone of a 2 m diameter parabolic mirror into a grooved Nd:YAG rod. The solar laser performance was numerically optimized by both ZEMAX® and LASCADTM software. Maximum TEM00-mode solar laser power of 32 W was numerically calculated for a 4.5 mm diameter, 34 mm length grooved Nd:YAG rod, corresponding to 10.7 W/m2 collection efficiency. This value is 1.25 times more than the numerical record. Laser beam brightness figure of merit of 31.4 W was numerically attained, which is 1.84 times more than the numerical record. The proposed laser head scheme has a simple and compact design, as compared to previous schemes. Good TEM00-mode solar laser thermal performance was also numerically demonstrated.
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ACKNOWLEDGMENTS
The FCT-MCTES fellowship grants SFRH/BPD/125116/2016, PD/BD/142827/2018, PD/BD/128267/2016 of C.R. Vistas, D. Garcia, B.D. Tibúrcio, respectively, and the Contract CEECIND/03081/2017 of J. Almeida are acknowledged.
Funding
Financial support of the strategic project (UIDB/00068/2020) of the Science and Technology Foundation of Portuguese Ministry of Science, Technology and Higher Education (FCT-MCTES).
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Vistas, C.R., Liang, D., Garcia, D. et al. 32 W TEM00-Mode Side-Pumped Solar Laser Design. Appl. Sol. Energy 56, 449–457 (2020). https://doi.org/10.3103/S0003701X20060122
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DOI: https://doi.org/10.3103/S0003701X20060122