Thermal lens analysis in a diode-pumped 10 Hz 100 mJ Yb:YAG amplifier

Thermal lens analysis in a diode-pumped 10 Hz 100 mJ Yb:YAG amplifier

We address the power scaling issue in end-pumped laser rod amplifiers by studying, experimentally and numerically, the magnitude of thermal lensing in a high-energy diode-pumped Yb:YAG crystal. The spatio-temporal temperature profile of the gain medium and the focal length of the induced thermal len...

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Veröffentlicht in:High power laser science and engineering 2020, Vol.8, Article e13
Hauptverfasser: Hariton, Victor, João, Celso Paiva, Pires, Hugo, Galletti, Mario, Figueira, Gonçalo
Format: Artikel
Sprache:eng
Schlagworte:
Amplifiers
Boundary conditions
Electric power distribution
Geometry
Heat
Lasers
Pumping
Repetition
Temperature distribution
Temperature profiles
Thermal lensing
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Zusammenfassung:We address the power scaling issue in end-pumped laser rod amplifiers by studying, experimentally and numerically, the magnitude of thermal lensing in a high-energy diode-pumped Yb:YAG crystal. The spatio-temporal temperature profile of the gain medium and the focal length of the induced thermal lens are determined numerically. The influence of the repetition rate and pumping power on the temperature distribution is analyzed. Experimental measurements covered repetition rates between 1 and 10 Hz and up to 4 kW pumping power.
ISSN:2095-4719
2052-3289
DOI:10.1017/hpl.2020.11