Beschreibung:
<jats:title>Abstract</jats:title><jats:p>There is a constant race for more power and higher pulse energies from femtosecond lasers to cater for demanding applications in materials processing such as TFT‐display mask repair, glass scribing, stent cutting or composite materials machining. This puts more and more stringent requirements on the components used in the oscillators as well as amplifiers of such laser systems, particularly the laser gain medium. We would like to present our recent results with what we identified to be appropriate gain media and which were used in regenerative amplifier systems. The experiments were performed in our R&D labs as well as in the High Q Laser in‐house application lab (cutting‐edge pico‐ and femtosecond laser systems as well as laser scanning and microscopy tools).</jats:p>