Optical laser pulses, matched with and synchronized to the FEL pulse train are provided for time-resolved pump-probe experiments. The EuXFEL laser group has developed a pump-probe laser based on non-collinear optical parametric amplification (NOPA). Currently available parameters:
| wavelength | pulse duration | repetition rate | pulse energy |
| 800 nm | 15 fs | 1.1 MHz | 0.25 mJ |
| 800 nm | 15 fs | 200 kHz | 1.3 mJ |
| 800 nm | 15 fs | 100 kHz | 1.8 mJ |
| 1030 nm | 900 fs | 1.1 MHz | 3 mJ |
| 1030 nm | 400 ps | 1.1 MHz | 3 mJ |
Optical setups for 2nd and 3rd harmonic generation are available. Additional wavelength conversion to the MIR region is possible with a commercial Optical Parametric Amplifier.
For pump-probe experiments, an optical synchronization system maintains the overall timing jitter of <10 fs RMS between oscillators seeding the optical laser amplifiers, the injector laser and multiple optical references in our linear accelerator. The latter can be used to measure the relative arrival time of the electron bunches on a single-shot basis, reducing the overall timing jitter to values of few tens of femtosecond.
Do not hesitate to contact Terry for more information and suggestions!