Doppler-free Fourier transform spectroscopy.

Meek, S. A.; Hipke, A.; Guelachvili, G.; Hänsch, T. W.; Picqué, N.

doi:10.1364/OL.43.000162

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Doppler-free Fourier transform spectroscopy.

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Meek, S. A.
Research Group of Precision Infrared Spectroscopy, MPI for Biophysical Chemistry, Max Planck Society;

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Citation

Meek, S. A., Hipke, A., Guelachvili, G., Hänsch, T. W., & Picqué, N. (2018). Doppler-free Fourier transform spectroscopy. Optics Letters, 43(1), 162-165. doi:10.1364/OL.43.000162.

Cite as: https://hdl.handle.net/21.11116/0000-0001-6EBA-3

Abstract

Sub-Doppler broadband multi-heterodyne spectroscopy is proposed and experimentally demonstrated. Using two laser frequency combs of slightly different repetition frequencies, we have recorded Doppler-free two-photon dual-comb spectra of atomic rubidium resonances of a width of 6 MHz, while simultaneously interrogating a spectral span of 10 THz. The atomic transitions are uniquely identified via the intensity modulation of the observed fluorescence radiation. To the best of our knowledge, these results represent the first demonstration of Doppler-free Fourier transform spectroscopy and extend the range of applications of broadband spectroscopy towards precision nonlinear spectroscopy.