Overview

• Researchers at Johannes Gutenberg University Mainz and Helmholtz Institute Mainz report the results in Physical Review Applied on August 25, 2025 (DOI: 10.1103/7ktx-4h8m).
• The approach pairs two synchronized optical frequency combs with a photodetector array and a frequency-ambiguity resolution scheme to deliver ambiguity-free, broadband spectra with high signal-to-noise.
• Applying the method to samarium vapor across varied temperatures and concentrations, the team identified several absorption lines absent from existing datasets.
• A high-temperature samarium cell near 1040°C and multichannel detection improved sensitivity and enabled clear discrimination of complex spectral features.
• The authors present the work as a first step toward Spectroscopy 2.0, a planned platform for massively parallel measurements including studies in pulsed, ultra-high magnetic fields.