Experimental demonstration of femtosecond two-color X-ray free-electron lasers

A. A. Lutman, R. Coffee, Y. Ding, Z. Huang, J. Krzywinski, T. Maxwell, M. Messerschmidt, H. D. Nuhn

Research output: Contribution to journalArticlepeer-review

227 Scopus citations


With an eye toward extending optical wave-mixing techniques to the x-ray regime, we present the first experimental demonstration of a two-color x-ray free-electron laser at the Linac Coherent Light Source. We combine the emittance-spoiler technique with a magnetic chicane in the undulator section to control the pulse duration and relative delay between two intense x-ray pulses and we use differently tuned canted pole undulators such that the two pulses have different wavelengths as well. Two schemes are shown to produce two-color soft x-ray pulses with a wavelength separation up to ∼1.9% and a controllable relative delay up to 40 fs.

Original languageEnglish (US)
Article number134801
JournalPhysical Review Letters
Issue number13
StatePublished - Mar 25 2013
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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