Affiliation:
1. Deutsches Elektronen-Synchrotron DESY
2. Universität Hamburg UHH
Abstract
Dual-frequency comb spectroscopy permits broadband precision spectroscopy with high acquisition rate. The combs’ repetition rates as well as the mutual coherence between the combs are key to fast and broadband measurements. Here, we demonstrate a 1-GHz high-repetition-rate dual-comb system with high mutual coherence (sub-Hz heterodyne beatnotes) based on mature, digitally controlled, low-noise erbium-doped mode-locked lasers. Two spectroscopy experiments are performed with acquisition parameters not attainable in a 100-MHz system: detection of water vapor absorption around 1375 nm, illustrating the potential for fast and ambiguity-free broadband operation, as well as acquisition of narrow gas absorption features across a spectral span of 0.6 THz (600 comb lines) in only 5
μ
s.
Funder
European Research Council
European Union’s Horizon 2020 Research and Innovation Programme
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Helmholtz Young Investigators Group
Subject
Atomic and Molecular Physics, and Optics
Cited by
7 articles.
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