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  • Letter
  • Open Access

Enhanced multichannel dual-comb spectroscopy of complex systems

Razmik Aramyan*, Oleg Tretiak, and Sushree S. Sahoo

Dmitry Budker

  • *Contact author: aramyanr@uni-mainz.de
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Phys. Rev. Applied 24, L021002 – Published 22 August, 2025

DOI: https://doi.org/10.1103/7ktx-4h8m

Abstract

A multichannel dual-comb spectroscopy (DCS) approach for high-resolution, broadband spectral measurements is presented, demonstrating its effectiveness in studying complex atomic systems. By implementing a photodetector array, we enhance DCS capabilities, addressing the fundamental trade-off between signal-to-noise ratio and spectral coverage. To resolve ambiguities in frequency conversion, we introduced a relative offset in beat-note frequency, ensuring accurate spectral reconstruction. As a proof of concept, the absorption spectrum of samarium (Sm) vapor is investigated over a 52-nm range, and several previously unreported absorption lines are detected. This is a step toward “Spectroscopy 2.0,” enabling massively parallel spectroscopic measurements (including those at >100 T magnetic fields) crucial for atomic physics and fundamental interactions research.

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References (19)

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Phys. Rev. Applied 24, L021002– Published 22 August, 2025
  • Received 13 March 2025
  • Accepted 16 July 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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