XUV frequency comb spectroscopy

C. Gohle, D.Z. Kandula, T.J. Pinkert, W.M.G. Ubachs, K.S.E. Eikema

Research output: Chapter in Book / Report / Conference proceedingChapterAcademicpeer-review

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Frequency comb lasers in the infrared region of the spectrum have revolutionized many fields of physics. We demonstrate for the first time direct frequency comb spectroscopy at XUV wavelengths. Generation of an XUV comb is realized by amplification of two pulses from a frequency comb laser in a parametric amplifier, and subsequent high-harmonic generation to 51 nm (15th harmonic).
These XUV pulses, with a time separation between 5.4 and 10 ns, are then used to directly excite helium on the 1s2 1S0 – 1s5p 1P1 transition. The resulting Ramsey-like signal has up to 60% modulation contrast, indicating a high phase coherence of the generated XUV comb light.
Original languageEnglish
Title of host publicationProceedings of the XIX International Conference on Laser Spectroscopy
EditorsH. Katori, K. Nakagawa, H. Yoneda
PublisherWorld Scientific
Publication statusPublished - 2010


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