Recent progress in cryogenic Yb:YLF laser technology

Umit Demirbas; Martin Kellert; Jelto Thesinga; Simon Reuter; Yi Hua; Mikhail Pergament; Franz X. Kärtner

doi:10.1117/12.2613369

3 March 2022 Recent progress in cryogenic Yb:YLF laser technology

Umit Demirbas, Martin Kellert, Jelto Thesinga, Simon Reuter, Yi Hua, Mikhail Pergament, Franz X. Kärtner

Proceedings Volume 12018, Photonic Heat Engines: Science and Applications IV; 1201802 (2022) https://doi.org/10.1117/12.2613369
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Yb:YLF crystal with near-unity quantum efficiency attracts the attention of researchers in high-power laser development and laser-cooling communities. Here, we will review our recent efforts in energy and average/peak power scaling of room temperature and cryogenic Yb:YLF lasers and amplifiers. At first, we will present temperature dependence of important laser related parameters in Yb:YLF such as fluorescence lifetime, absorption cross section, emission cross section and gain in the 78-300 K range. We will then discuss the in situ optical temperature estimation methods that could be used to accurately estimate Yb:YLF crystal temperature. Later, we will review our recent lasing/amplification results with room temperature (RT) and cryogenic Yb:YLF systems, where we have achieved output powers exceeding 500 W in cw operation with efficiencies approaching 80% and pulse energies above 300 mJ at 10 Hz repetition rate.

Conference Presentation

Citation Download Citation

Umit Demirbas, Martin Kellert, Jelto Thesinga, Simon Reuter, Yi Hua, Mikhail Pergament, and Franz X. Kärtner "Recent progress in cryogenic Yb:YLF laser technology", Proc. SPIE 12018, Photonic Heat Engines: Science and Applications IV, 1201802 (3 March 2022); https://doi.org/10.1117/12.2613369

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