Joint Research Group Ultrafast Dynamics
Optical methods
Laser parameters:
| Repetition Rate | adjustable by user from 200 kHz to 25 MHz |
| Pulse Energy |
adjustable by user: 0.8 µJ @ frep > 2 MHz < 25 MHz |
| Average Output Power | adjustable by user: max. 10 W @ frep = 2 MHz typical operation: 2 W @ frep = 208 kHz |
| Pulse Duration | 250 fs |
| Center Wavelength | 1030 nm |
Nopa-Setup
A high repetition-rate NOPA setup allows for the generation of wavelength-tunable pulses in the range of 440 nm to 990 nm. The pulses can be compressed from the initial duration of ~250 fs down to 20 fs - 30 fs. The NOPA is pumped with frequency tripled pulses from the CLARK-Impulse laser system. A fraction of the laser output is employed to generate a white-light continuum which is used as a seed for the NOPA.
In our setup, the residual of the fundamental beam is used as a pump beam for ultrafast optical pump-probe measurements. The frequency-converted output of the NOPA is employed as the probe beam.