Energy scaling of Kerr-lens modelocked Ho:YAG thin-disk oscillators to the microjoule level
Abstract
We demonstrate peak power and pulse energy scaling of Kerr-lens modelocking (KLM) Ho:YAG thin-disk lasers (TDLs) emitting at 2.1-μm wavelength. We compare different laser configurations to reach a maximum pulse energy of 1.7 μJ at an output power of 29 W with a pulse duration of 434 fs, corresponding to a peak power of 3.7 MW. This represents a 5-fold increase in pulse energy and 4-fold increase in peak power compared to previous KLM Ho:YAG TDLs, thus reaching record high peak power for 2.1-μm mode-locked oscillators. We discuss current limitations at this wavelength and guidelines for future work towards higher power and pulse energies.
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