The new laser system is a 100-kHz OPCPA from Fastlite, pumped by a 225-W Yb:YAG thin-disk regenerative amplifier from Trumpf Scientific, based on an industrial micro-machining system. The high repetition rate and average power of the OPCPA output is envisaged to provide good signal-to-noise ratio in both photo-electron and optical (infrared) spectroscopy experiments. The system has several outputs, as detailed in the following (according to factory acceptance tests):
|Mode||Wavelength (nm)||Pulse energy (uJ)||Pulse duration (fs)|
1750 ± 100
2800 ± 200
|Tunable IR spectroscopy|
* depending on wavelength
There is also the possibility to generate picosecond tunable IR pulses.
The laser has arrived on site and, despite Covid-related restrictions, we are currently making steady progress with the installation, remotely assisted by Trumpf Scientific and Fastlite. We are also commissioning a new 100-kHz HHG beamline and developing secondary sources in the vis-NIR and MIR to facilitate future experiments in time-resolved XUV photo-electron spectroscopy and 2D-IR spectroscopy. Further details regarding the laser specifications and secondary sources will soon be available.