Seeded X-ray free-electron laser generating radiation with laser statistical properties

Oleg Yu. Gorobtsov, Giuseppe Mercurio, Flavio Capotondi, Petr Skopintsev, Sergey Lazarev, Ivan A. Zaluzhnyy, Miltcho B. Danailov, Martina Dell’Angela, Michele Manfredda, Emanuele Pedersoli, Luca Giannessi, Maya Kiskinova, Kevin C. Prince, Wilfried Wurth and Ivan A. Vartanyants ()
Additional contact information
Oleg Yu. Gorobtsov: Deutsches Elektronen-Synchrotron DESY
Giuseppe Mercurio: University of Hamburg and Center for Free Electron Laser Science
Flavio Capotondi: Elettra-Sincrotrone Trieste
Petr Skopintsev: Deutsches Elektronen-Synchrotron DESY
Sergey Lazarev: Deutsches Elektronen-Synchrotron DESY
Ivan A. Zaluzhnyy: Deutsches Elektronen-Synchrotron DESY
Miltcho B. Danailov: Elettra-Sincrotrone Trieste
Martina Dell’Angela: CNR- IOM Istituto Officina dei Materiali
Michele Manfredda: Elettra-Sincrotrone Trieste
Emanuele Pedersoli: Elettra-Sincrotrone Trieste
Luca Giannessi: Elettra-Sincrotrone Trieste
Maya Kiskinova: Elettra-Sincrotrone Trieste
Kevin C. Prince: Elettra-Sincrotrone Trieste
Wilfried Wurth: Deutsches Elektronen-Synchrotron DESY
Ivan A. Vartanyants: Deutsches Elektronen-Synchrotron DESY

Nature Communications, 2018, vol. 9, issue 1, 1-6

Abstract: Abstract The invention of optical lasers led to a revolution in the field of optics and to the creation of such fields of research as quantum optics. The reason was their unique statistical and coherence properties. The emerging, short-wavelength free-electron lasers (FELs) are sources of very bright coherent extreme-ultraviolet and X-ray radiation with pulse durations on the order of femtoseconds, and are presently considered to be laser sources at these energies. FELs are highly spatially coherent to the first-order but in spite of their name, behave statistically as chaotic sources. Here, we demonstrate experimentally, by combining Hanbury Brown and Twiss interferometry with spectral measurements that the seeded XUV FERMI FEL-2 source does indeed behave statistically as a laser. The results may be useful for quantum optics experiments and for the design and operation of next generation FEL sources.

Date: 2018
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DOI: 10.1038/s41467-018-06743-8

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