Journal
PHYSICAL REVIEW A
Volume 90, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.90.011805
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Funding
- European Research Council [267854]
- Max Planck Foundation
- European Laboratory for Frequency Comb Spectroscopy
- Munich Center for Advanced Photonics
- European Research Council (ERC) [267854] Funding Source: European Research Council (ERC)
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Multiplex two-photon excitation spectroscopy is demonstrated at Doppler-limited resolution. We describe first Fourier-transform two-photon spectroscopy of an atomic sample with two mode-locked laser oscillators in a dual-comb technique. Each transition is uniquely identified by the modulation imparted by the interfering comb excitations. The temporal modulation of the spontaneous two-photon fluorescence is monitored with a single photodetector, and the spectrum of all excited transitions is revealed by a Fourier transform.
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