Dual frequency comb spectroscopy in the molecular fingerprint region
Abstract
Spectroscopy in the molecular fingerprint spectral region (6.5-20 m) yields critical information on material structure for physical, chemical and biological sciences. Despite decades of interest and effort, this portion of the electromagnetic spectrum remains challenging to cover with conventional laser technologies. In this report, we present a simple and robust method for generating super-octave, optical frequency combs in the fingerprint region through intra-pulse difference frequency generation in an orientation-patterned gallium phosphide crystal. We demonstrate the utility of this unique coherent light source for high-precision, dual-comb spectroscopy in methanol and ethanol vapor. These results highlight the potential of laser frequency combs for a wide range of molecular sensing applications, from basic molecular spectroscopy to nanoscopic imaging.
Keywords
Cite
@article{arxiv.1712.09764,
title = {Dual frequency comb spectroscopy in the molecular fingerprint region},
author = {Henry Timmers and Abijith Kowligy and Alex Lind and Flavio C. Cruz and Nima Nader and Myles Silfies and Thomas K. Allison and Gabriel Ycas and Peter G. Schunemann and Scott B. Papp and Scott A. Diddams},
journal= {arXiv preprint arXiv:1712.09764},
year = {2017}
}