Nanophotonic supercontinuum-based mid-infrared dual-comb spectroscopy
Abstract
High resolution and fast detection of molecular vibrational absorption is important for organic synthesis, pharmaceutical processes, and environmental monitoring, and is enabled by mid-infrared (mid-IR) laser frequency combs via dual-comb spectroscopy. Here, we demonstrate a novel and highly simplified approach to broadband mid-IR dual-comb spectroscopy via supercontinuum generation, achieved using unprecedented nanophotonic dispersion engineering that allows for ultra-broadband and flat-envelope mid-IR frequency combs. Our mid-IR dual-comb spectrometer has an instantaneous bandwidth covering the functional group region from 2800 – 3600 c m − 1 , comprising more than 100,000 comb lines, enabling parallel gas-phase detection with a high sensitivity, sub-Doppler spectral resolution, and a high speed. In addition to the traditional functional groups, their isotopologues are also resolved in this supercontinuum-based dual-comb spectroscopy. Our approach combines well established fiber laser combs, digital coherent data averaging, and integrated nonlinear photonics, each in itself a state-of-the-art technology, signaling the emergence of mid-IR dual-comb spectroscopy for use outside of the protected laboratory environment.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 08, 2020
- Source ID
- 10.1364/optica.396542
Entities
People
- Camille Sophie Brès
- Fan Yang
- Hairun Guo
- Junqiu Liu
- Luc Thévenaz
- Ronald Holzwarth
- Tobias Kippenberg
- W. Hänsel
- Wenle Weng
Organizations
- Air Force Office of Scientific Research
- Defense Advanced Research Projects Agency
- Marie Skłodowska-Curie Actions
- National Natural Science Foundation of China
- Shanghai Science and Technology Development Foundation
- Swiss National Science Foundation