Affiliation:
1. National Institute of Standards and Technology
2. University of Colorado Boulder
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 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.
Funder
National Institute of Standards and
Technology
U.S. Air Force