Mutually coherent high-order harmonic pulses for XUV ramsey spectroscopy

Year: 2005

Authors: Bellini M., Cavalieri S., Corsi C., Eramo R., Materazzi M.

Autors Affiliation: Istituto Nazionale di Ottica Applicata (INOA), l. go E. Fermi 6, 50125 Firenze, Italy;
INFM, U.d.R di Firenze, via Sansone 1, 50019 Sesto Fiorentino, Italy
Dip. di Fisica, Universitá di Firenze, via Sansone 1, 50019 Sesto Fiorentino, Italy;
LENS–European Laboratory for Nonlinear Spectroscopy, via N. Carrara 1, 50019 Sesto Fiorentino, Italy;
INFM CRS-SOFT, Universitá di Roma “La Sapienza,” p. le A. Moro 2, 00185 Roma, Italy

Abstract: We describe the series of experiments that led to the development of the Ramsey technique for achieving high-resolution atomic spectroscopy in the extreme ultraviolet with high-order harmonics. We start with a demonstration of phase coherence in the harmonic generation process, then, we illustrate the appearance of spectral interference fringes in the case of collinear, time-delayed harmonic pulses, and we finally present the first demonstration of a Ramsey technique that is based on pairs of time-delayed and phase-coherent harmonic pulses and that is used for the study of the excited states of krypton.

Journal/Review: LASER PHYSICS

Volume: 15 (2)      Pages from: 324  to: 327

KeyWords: Harmonic analysis; Krypton; Natural frequencies; Radio interference; Spectrum analysis; Surface roughness; Ultraviolet radiation, Beamsplitters; Frequency spectrum; Harmonic pulses; Ramsey spectroscopy, Atomic spectroscopy; Resonances; Resolution

Citations: 1
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