Chang Kristina F, Lesko Daniel M B, Mashburn Carter, Chang Peter, Tsao Eugene, Lind Alexander J, Diddams Scott A
Opt Lett. 2024 Apr 1;49(7):1684-1687. doi: 10.1364/OL.515776.
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.
紫外（UV）和可见光波段的双梳光谱技术能够实现具有前所未有的频率分辨率的宽带电子光谱。然而，双梳数据的产生、检测和处理存在重大挑战，这限制了其在该光谱区域的发展。在这项工作中，我们利用稳健的1550 nm少周期脉冲在紫外-可见光波段产生频率梳。我们将这些频率梳与波长复用双梳光谱仪相结合，并在386、500和760 nm的三个不同谐波处同时获取100 MHz梳状模式分辨光谱。这些实验突出了实现200 - 750 nm连续双梳覆盖的途径，为广泛获取原子、分子和固体中的电子跃迁提供了可能。
