Versatile silicon-waveguide supercontinuum for coherent mid-infrared spectroscopy
Abstract
Infrared spectroscopy is a powerful tool for basic and applied science. The molecular spectral fingerprints in the 3 um to 20 um region provide a means to uniquely identify molecular structure for fundamental spectroscopy, atmospheric chemistry, trace and hazardous gas detection, and biological microscopy. Driven by such applications, the development of low-noise, coherent laser sources with broad, tunable coverage is a topic of great interest. Laser frequency combs possess a unique combination of precisely defined spectral lines and broad bandwidth that can enable the above-mentioned applications. Here, we leverage robust fabrication and geometrical dispersion engineering of silicon nanophotonic waveguides for coherent frequency comb generation spanning 70 THz in the mid-infrared (2.5 um to 6.2 um). Precise waveguide fabrication provides significant spectral broadening and engineered spectra targeted at specific mid-infrared bands. We use this coherent light source for dual-comb spectroscopy at 5 um.
Cite
@article{arxiv.1707.03679,
title = {Versatile silicon-waveguide supercontinuum for coherent mid-infrared spectroscopy},
author = {Nima Nader and Daniel L. Maser and Flavio C. Cruz and Abijith Kowligy and Henry Timmers and Jeff Chiles and Connor Fredrick and Daron A. Westly and Sae Woo Nam and Richard P. Mirin and Jeffrey M. Shainline and Scott A. Diddams},
journal= {arXiv preprint arXiv:1707.03679},
year = {2019}
}
Comments
26 pages, 5 figures