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arXiv · 2312.08492

A Multi-Harmonic NIR-UV Dual-Comb Spectrometer

Kristina F. Chang·Daniel M. B. Lesko·Carter Mashburn·Peter Chang·Eugene Tsao·Alexander J. Lind·Scott A. Diddams
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Abstract

Dual-comb spectroscopy in the ultraviolet (UV) and visible would enable broad bandwidth electronic spectroscopy with unprecedented frequency resolution. However, there are significant challenges in generation, detection and processing of dual-comb data that have restricted its progress in this spectral region. In this work, we leverage robust 1550 nm few-cycle pulses to generate frequency combs in the UV-visible. We couple this source to a wavelength multiplexed dual-comb spectrometer and simultaneously retrieve 100 MHz comb-mode-resolved spectra over three distinct harmonics spanning 380-800 nm. The experiments highlight the path to continuous dual-comb coverage spanning 200-750 nm, offering extensive access to electronic transitions in atoms, molecules, and solids.

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Kristina F. Chang, Daniel M. B. Lesko, Carter Mashburn, Peter Chang, Eugene Tsao, Alexander J. Lind, Scott A. Diddams. 2023-12-13. A Multi-Harmonic NIR-UV Dual-Comb Spectrometer. https://arxiv.org/abs/2312.08492

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