Abstract
A method for creating composite active elements from dissimilar optical materials, which consists in treating surfaces with a beam of heavy argon ions and forming an optical contact between the surfaces, is implemented and tested. Composite active elements Yb:YAG/YAG and Yb:YAG/sapphire in the geometry of a thin disk are created. The elements are tested in a high-average-power laser scheme. Lasing with a differential efficiency of 48% at at a power of more than 100 W is obtained using the Yb:YAG/sapphire element, while the lasing efficiency for the Yb:YAG/YAG element is 39%, which is a consequence of more efficient cooling of the active medium through sapphire.
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Funding
This work was carried out using equipment of the Center for Theoretical Physics of the Institute of the Physics of Microstructures, Russian Academy of Sciences, with financial support from the Russian Foundation for Basic Research (project no. 19-02-00631) regarding implementation of the method for creating and manufacturing composites (grant no. 17-02-00640 i) regarding studying the surface morphology upon ion-beam etching, Russian Science Foundation (project no. 18-72-10 134) regarding the testing of active elements in a high-power laser scheme.
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Translated by Sh. Galyaltdinov
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Kuznetsov, I.I., Mukhin, I.B., Volkov, M.R. et al. Creation of Composite Optical Elements by the Ion-Beam Surface-Activation Method for Laser Applications. J. Surf. Investig. 14, 1016–1021 (2020). https://doi.org/10.1134/S1027451020050316
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DOI: https://doi.org/10.1134/S1027451020050316