Multipass amplifiers of POLARIS
2013
Advanced high intensity laser matter interaction experiments always call for optimized laser performance. In order to
further enhance the POLARIS laser system, operational at the University of Jena and the Helmholtz-Institute Jena, in
particular its energy, bandwidth and focusability, new amplifier technologies have been developed and are reported here.
Additionally, existing sections were considerably improved. A new multi-pass amplification stage, which is able to
replace two currently used ones, was developed in close collaboration with the MPQ (Garching). The new basic elements
of this amplifier are well homogenized pump modules and the application of a successive imaging principle. By
operating the amplifier under vacuum conditions a top hat beam profile with an output energy of up to 1.5 J per pulse is
foreseen. The already implemented POLARIS amplifier A4 was further improved by adapting an advanced method for
the homogenization of the multi-spot composed pump profile. The new method comprises a computer-based
evolutionary algorithm which optimizes the position of the different spots regarding its individual size, shape and
intensity. The latter allowed a better homogenization of the POLARIS near field profile.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
11
References
8
Citations
NaN
KQI