Investigation of the lasing performance of a crystalline-coated Yb:YAG thin-disk directly bonded onto a silicon carbide heatsink

0556272 - FZÚ 2023 RIV US eng J - Journal Article
Cvrček, Jan - Cimrman, Martin - Vojna, David - Štěpánková, Denisa - Foršt, Ondřej - Smrž, Martin - Novák, Ondřej - Slezák, Ondřej - Chyla, Michal - Jelínek, M. - Mocek, Tomáš
Investigation of the lasing performance of a crystalline-coated Yb:YAG thin-disk directly bonded onto a silicon carbide heatsink.
Optics Express. Roč. 30, č. 5 (2022), s. 7708-7715. ISSN 1094-4087
R&D Projects: GA MŠMT EF15_006/0000674; GA TA ČR(CZ) FW03010298
EU Projects: European Commission(XE) 739573 - HiLASE CoE
Grant - others:OP VVV - HiLASE-CoE(XE) CZ.02.1.01/0.0/0.0/15_006/0000674
Institutional support: RVO:68378271
Keywords : Yb:YAG * thin disk * silicon carbide heatsink
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 3.8, year: 2022
Method of publishing: Open access

We investigated the use of crystalline coatings as the highly reflective coating of an Yb:YAG thin disk directly bonded onto a silicon carbide heatsink. Compared to commonly used ion-beam-sputtered coatings, it possesses lower optical losses and higher thermal conductivity, resulting in better heat management and laser outputs. We pumped the disk up to 1.15 kW at 969 nm and reached 665 W of average output power, and disk temperature of 107 °C with a highly multi-modal V-cavity. These promising results were reached with this novel design despite the adoption of a cheap silicon carbide substrate having more than 3 times lower thermal conductivity compared to frequently used CVD diamond.
Permanent Link: http://hdl.handle.net/11104/0330557