Waterproof coatings for high-power laser cavities

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Cheng, X.; Dong, S.; Zhi, S.; Paschel, S.; Balasa, I. et al.: Waterproof coatings for high-power laser cavities. In: Light: Science and Applications 8 (2019), Nr. 1, 12. DOI: https://doi.org/10.1038/s41377-018-0118-6

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Sum total of downloads: 22




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Abstract: 
With the ever-increasing laser power and repetition rate, thermal control of laser media is becoming increasingly important. Except for widely used air cooling or a bonded heat sink, water cooling of a laser medium is more effective in removing waste heat. However, how to protect deliquescent laser media from water erosion is a challenging issue. Here, novel waterproof coatings were proposed to shield Nd:Glass from water erosion. After clarifying the dependence of the waterproof property of single layers on their microstructures and pore characteristics, nanocomposites that dope SiO 2 in HfO 2 were synthesized using an ion-assisted co-evaporation process to solve the issue of a lack of a high-index material that simultaneously has a dense amorphous microstructure and wide bandgap. Hf 0.7 Si 0.3 O 2 /SiO 2 multifunctional coatings were finally shown to possess an excellent waterproof property, high laser-induced damage threshold (LIDT) and good spectral performance, which can be used as the enabling components for thermal control in high-power laser cavities.
License of this version: CC BY 4.0
Document Type: article
Publishing status: publishedVersion
Issue Date: 2019
Appears in Collections:An-Institute

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1 image of flag of Germany Germany 18 81.82%
2 image of flag of Netherlands Netherlands 2 9.09%
3 image of flag of France France 1 4.55%
4 image of flag of Europe Europe 1 4.55%

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