200 J, 10 Hz demonstration of a cryogenic helium gas-cooled Yb:YAG DPSSL amplifier with 10 kW-class pumping

Résumé fourni par la source

We report 200 J pulse energy at 10 Hz from a cryogenically cooled Yb:YAG ceramics laser amplifier. Thermal management remains critical in high-energy, high-repetition-rate solid-state lasers, because increased pump power induces thermal loading in the gain medium and wavefront distortions that limit energy scalability. We developed a multidisk amplifier operating under 10 kW pump power with helium gas cooling at 150 K and a mass flow rate of 174 g/s. The amplifier achieved 2 kW average output in a two-pass configuration at a pump energy of 944 J. These results represent one of the highest reported average powers for high-energy and high-repetition-rate diode-pumped solid-state laser amplifiers.

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