Dual-comb spectroscopy over a 100 km open-air path

Dual-comb spectroscopy (DCS) provides broadband, high-resolution, high-sensitivity amplitude and phase spectra within a short measurement time, thus holding promises for atmospheric spectroscopy. However, previous research has been limited to measuring over open-air paths of about 20 km. Here, by de...

Full description

Saved in:
Bibliographic Details
Published in:Nature photonics 2024-11, Vol.18 (11), p.1195-1202
Main Authors: Han, Jin-Jian, Zhong, Wei, Zhao, Ruo-Can, Zeng, Ting, Li, Min, Lu, Jian, Peng, Xin-Xin, Shi, Xi-Ping, Yin, Qin, Wang, Yong, Esamdin, Ali, Shen, Qi, Guan, Jian-Yu, Hou, Lei, Ren, Ji-Gang, Jia, Jian-Jun, Wang, Yu, Jiang, Hai-Feng, Xue, Xiang-Hui, Zhang, Qiang, Dou, Xian-Kang, Pan, Jian-Wei
Format: Article
Language:English
Subjects:
639/624/1075/1078
639/624/1107/527
Applied and Technical Physics
Broadband
Carbon dioxide
Greenhouse gases
Monitoring
Optical frequency
Physics
Physics and Astronomy
Quantum Physics
Spectra
Spectral sensitivity
Spectroscopic analysis
Spectroscopy
Spectrum analysis
Time measurement
Time-frequency analysis
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Dual-comb spectroscopy (DCS) provides broadband, high-resolution, high-sensitivity amplitude and phase spectra within a short measurement time, thus holding promises for atmospheric spectroscopy. However, previous research has been limited to measuring over open-air paths of about 20 km. Here, by developing a bistatic set-up using time–frequency dissemination and high-power optical frequency combs, we implement DCS over a 113 km turbulent horizontal open-air path. We successfully measure the absorbance spectra of CO 2 and H 2 O with a 7 nm spectral bandwidth and a 10 kHz frequency accuracy, and achieve a sensing precision of
ISSN:1749-4885
1749-4893
DOI:10.1038/s41566-024-01525-9