Abstract
Many disciplines in science and technology require ultrafast laser sources with ever-increasing average and peak power. Among several promising technologies, semiconductor saturable absorber mirror (SESAM) [1] mode-locked thin disk lasers (TDLs) are particularly attractive, offering the potential for compact low-noise multi-MHz laser systems with hundreds of watts of average power. They currently reach the highest average power (275 W) and pulse energy (80 μJ [2]) of any ultrafast oscillator. In order to continue pushing the performance of these systems even further, the thermal properties and surface quality of the SESAMs need to be improved, as high damage thresholds and large apertures for beam sizes up to several cm are required.
© 2015 IEEE
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