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Multi-harmonic near-infrared–ultraviolet dual-comb spectrometer



Kristina Chang, Daniel Lesko, Carter Mashburn, Peter Chang, Eugene Tsao, Alexander Lind, Scott Diddams


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 combine these combs with a wavelength multiplexed dual-comb spectrometer and simultaneously retrieve 100 MHz comb-mode-resolved spectra over three distinct harmonics at 386, 500, and 760 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.
Optics Letters


Chang, K. , Lesko, D. , Mashburn, C. , Chang, P. , Tsao, E. , Lind, A. and Diddams, S. (2024), Multi-harmonic near-infrared–ultraviolet dual-comb spectrometer, Optics Letters, [online],, (Accessed June 17, 2024)


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Created March 19, 2024, Updated June 7, 2024