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:
Mode
| Wavelength (nm)
| Pulse energy (uJ)
| Pulse duration (fs)
|
CEP-stable HHG
| 1750 ± 100
2800 ± 200
| ~150 50-100
| 50 65
|
Tunable IR spectroscopy
| 1430-1850 2330-3680
| 85-240* 27-135*
| 80-160* 100-180*
|
* depending on wavelength
There is also the possibility to generate picosecond tunable IR pulses.
The laser has arrived on site and we are currently making good progress with the installation, 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.
