Mid-infrared frequency combs and staggered spectral patterns in χ(2)microresonators

作     者：Amiune, Nicolas Fan, Zhiwei Pankratov, Vladislav V. Puzyrev, Danila N. Skryabin, Dmitry V. Zawilski, Kevin T. Schunemann, Peter G. Breunig, Ingo 

作者机构：Laboratory for Optical Systems Department of Microsystems Engineering-IMTEK University of Freiburg Georges-Köhler-Allee 102 Freiburg79110 Germany Department of Physics University of Bath England BathBA2 7AY United Kingdom BAE Systems Inc. MER15-1813 P.O. Box 868 NashuaNH03061-0868 United States Fraunhofer Institute for Physical Measurement Techniques IPM Georges-Köhler-Allee 301 Freiburg79110 Germany 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2022年

核心收录：

主　　题：Quantum cascade lasers 

摘      要：The potential of frequency comb spectroscopy has aroused great interest in generating mid-infrared frequency combs in the integrated photonic setting. However, despite remarkable progress in microresonators and quantum cascade lasers, the availability of suitable mid-IR comb sources remains scarce. Here, we present a new approach for the generation of mid-IR microcombs through cascaded three-wave-mixing. By pumping a CdSiP2microresonator at 1.55 μm wavelength with a low power continuous wave laser, we generate χ(2)frequency combs at 3.1 μm wavelength, with a span of about 30 nm. We observe ordinary combs states with a line spacing of the free spectral range of the resonator, and combs where the sideband numbers around the pump and half-harmonic alternate, forming staggered patterns of spectral lines. Our scheme for mid-IR microcomb generation is compatible with integrated telecom lasers. Therefore, it has the potential to be used as a simple and fully integrated mid-IR comb source, relying on only one single material. © 2022, CC BY.