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We report a solar pumped solid state laser using a 20 mm long, 3 mm diameter neodymium-doped yttrium aluminum garnet laser rod. This rod was placed in a liquid cooling chamber using a water–white-emulsion-paint mix. This mix provides cooling for the laser crystal and also doubles as a diffuse light scattering liquid. This enhances sunlight scattering and leads to a greater absorption in the laser rod. We numerically model the solar absorption in the laser rod using a ray-tracing model and predict a 2.6 times enhancement in absorption when a 98% reflective diffuse scatter is modelled compared to 0% scattering. We experimentally demonstrated this, showing a 2.58 times increase in average output power of the solar laser compared to the use of pure water as a cooling liquid. Using the water–white-paint scattering cooling liquid, we demonstrated a laser with an output power of 2.3 W and with a collection efficiency of 27.5 W∕m2.
- High power lasers
- Laser modes
- Laser systems
- Nd: YAG lasers
- Rod lasers
- Solid state lasers
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- 1 Finished
1/10/13 → 28/02/18
- 12 Citations
- 1 Article
Smyth, C. J. C., Mirkhanov, S., Quarterman, A. H. & Wilcox, K. G., 20 Jan 2020, In: Applied Optics. 59, 3, p. 800 1 p.
Research output: Contribution to journal › Article › peer-reviewOpen AccessFile
Figures in support of 27.5 W/m2 collection efficiency solar laser using a diffuse scattering cooling liquid
Smyth, C. (Creator), University of Dundee, 2018