Single-crystal and ceramic Yb:Lu2O3 gain media for thin-disk oscillators

We report on the direct comparison of single-crystal and ceramic Yb 3+ :Lu 2 0 3 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-cr...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2023-10, Vol.129 (10), Article 160
Main Authors: Esser, Stefan, Xu, Xiaodong, Wang, Jun, Zhang, Jian, Graf, Thomas, Abdou Ahmed, Marwan
Format: Article
Language:English
Subjects:
Applied physics
Ceramics
Continuous radiation
Crystal oscillators
Depolarization
Emission spectra
Engineering
Lasers
Lutetium oxide
Optical Devices
Optics
Oscillators
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Quantum Optics
Single crystals
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Summary:We report on the direct comparison of single-crystal and ceramic Yb 3+ :Lu 2 0 3 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.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-023-08103-x