1. Single-crystal and ceramic Yb:Lu2O3 gain media for thin-disk oscillators.
- Author
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Esser, Stefan, Xu, Xiaodong, Wang, Jun, Zhang, Jian, Graf, Thomas, and Abdou Ahmed, Marwan
- Subjects
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ACTIVE medium , *THULIUM , *YTTERBIUM , *CERAMICS , *MOLECULAR spectra - Abstract
We report on the direct comparison of single-crystal and ceramic Yb3+:Lu203 gain media with respect to emission spectra, fluorescence lifetime, depolarization, and laser performance in a continuous-wave thin-disk laser oscillator. The most efficient laser operation was achieved with a single-crystal disk in multimode operation with a slope efficiency of 72.1% and an average output power of 997 W. At the same temperature level, a ceramic disk delivered 861 W with a slope efficiency of 68.6%. In fundamental-mode operation, the highest average power of 360 W and highest optical efficiency of 41.3% were obtained with a ceramic disk. For the single-crystal disk, the fundamental-mode output power was limited to 113 W at an optical efficiency of 29%, potentially due to stress within the crystal. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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