Speaker
Description
The infrared free-electron laser (IR-FEL) at the Fritz Haber Institute recently commissioned a two-color upgrade, enabling simultaneous lasing with two IR FEL oscillators with independently tunable wavelength. This is realized by employing a high-frequency kicker cavity to feeding alternating electron bunches from within the 1GHz bunch train into the two separate IR FEL oscillators. Within this scheme, a high intrinsic temporal synchronization between both FEL outputs is expected*.
In our contribution, we present two-color time-resolved optical cross correlation results proving this synchronization. We also establish that the pulse duration of both FEL increases with increasing desynchronism between the oscillating optical field and the electron bunches, in accordance with earlier studies**. By leveraging the independently tunable pulse durations in each FEL, we further explore the achievable time-resolution that can be expected when the two-color FEL is employed for future IR-IR pump-probe experiments.
Footnotes
- Schwettman, H. A., and T. I. Smith. "Two-color free-electron laser driven by a radio-frequency linear accelerator." Journal of the Optical Society of America B 6.5 (1989): 973-976.
** Bakker, R. J., et al. "Short-pulse effects in a free-electron laser." IEEE journal of quantum electronics 30.7 (2002): 1635-1644.
Funding Agency
A.C.B. acknowledges funding by the Max Planck–Radboud University Center for Infrared Free Electron Laser Spectroscopy
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