Abstract
Heat dissipation inside diode-pumped Nd:YVO4 laser crystals requires an efficient cooling concept to reduce heat-induced stress and thus to avoid the mechanical destruction of the laser medium. Due to a high degree of design freedom, additive manufacturing of heat sinks offers great potentials to integrate cooling channels and sensors within a single component. These advantages are associated with a reduced choice of materials. The thermal and mechanical properties of the printing material have a significant impact on the emerging stress. For a suitable choice of printing material, temperatures and stress occurring in the application of the product are calculated using a multi-physical simulation model. By coupling optical, thermal and mechanical effects within a single simulation model, the mechanical stress in the laser crystal is investigated as a function of thermal material properties. Based on this information, thermal requirements are defined to ensure a non-destructive operation of a present laser application.
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Acknowledgements
This research has been funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germanys Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, Project ID 390833453), funded by the Ministry for Science and Culture of Lower Saxony (MWK)—School for Additive Manufacturing SAM and funded by EFRE—Nbank within the project GROTESK—Generative Fertigung optischer, thermaler und struktureller Komponenten (ZW6-85018307, ZW6-85017815, ZW6-85017913, ZW6-85018048).
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Röttger, J. et al. (2023). Additive Manufacturing of a Laser Heat Sink: Multiphysical Simulation for Thermal Material Requirement Derivation. In: Lachmayer, R., Bode, B., Kaierle, S. (eds) Innovative Product Development by Additive Manufacturing 2021. Springer, Cham. https://doi.org/10.1007/978-3-031-05918-6_12
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