Asian Journal of Physics Vol. 34, Nos 5 & 6 (2025) 297-307

Generation of Fourier-limited pulses in the XUV with seeded FELs

Enrico Allaria
Elettra – Sincrotrone Trieste S.C.p.A., S.S. 14 – km 163,5, IT-34149 Basovizza, Trieste (Italy)

The advent of lasers revolutionised experimental physics, enabling scientists to utilise coherence to access new states of matter and develop innovative techniques. The recent development of Free Electron Lasers (FELs) extends many laser properties—such as ultra short pulses, transverse coherence, and high intensity—into the X-ray spectral range, marking the beginning of a new scientific era. The ability to generate fully coherent FEL pulses has opened opportunities for advanced techniques, including coherent control at much shorter wavelengths. Achieving complete control of electromagnetic fields via FELs requires precise manipulation of the underlying physical processes. Employing an external seed to initiate FEL amplification has proven to be a promising approach for producing fully coherent pulses. However, this method demands significant effort in controlling the electron beam properties responsible for FEL amplification. © Anita Publications. All rights reserved.
Doi: 10.54955/AJP.34.5-6.2025.297-307
Keywords: Free Electron Laser, X-ray laser, coherent FEL.

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Method: Single- anonymous; Screened for Plagiarism? Yes
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