Title :

External-cavity diode laser-based near-infrared broadband laser heterodyne radiometer for remote sensing of atmospheric CO 2

Author(s) :

Wang, Jingjing [Auteur]
Fudan University [Shanghai]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]
Tu, Tan [Auteur]
Chinese Academy of Sciences [Beijing] [CAS]
Zhang, Feng [Auteur]
Fudan University [Shanghai]
Shen, Fengjiao [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]
Xu, Jian [Auteur]
Chinese Academy of Sciences [Beijing] [CAS]
Cao, Zhensong [Auteur]
Chinese Academy of Sciences [Beijing] [CAS]
Gao, Xiaoming [Auteur]
Chinese Academy of Sciences [Beijing] [CAS]
Plus, Stéphane [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Chen, Weidong [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]

Journal title :

Optics Express

Pages :

9251-9263

Publisher :

Optical Society of America - OSA Publishing

Publication date :

2023-02-27

ISSN :

1094-4087

HAL domain(s) :

Sciences de l'ingénieur [physics]/Optique / photonique

English abstract : [en]

A near-infrared broadband (1500–1640 nm) laser heterodyne radiometer (LHR) with a tunable external-cavity diode laser as the local oscillator is developed and the relative transmittance, which represents the absolute ...
Show more >A near-infrared broadband (1500–1640 nm) laser heterodyne radiometer (LHR) with a tunable external-cavity diode laser as the local oscillator is developed and the relative transmittance, which represents the absolute relationship between the measured spectral signals and the atmospheric transmittance, is derived. High-resolution (0.0087 cm -1 ) LHR spectra in the spectral region of 6248.5–6256 cm −1 were recorded for the observation of atmospheric CO 2 . Combined with the relative transmittance, the preprocessed measured LHR spectra, the optimal estimation method, and the Python scripts for computational atmospheric spectroscopy, the column-averaged dry-air mixing ratio of CO 2 of 409.09 ± 8 ppmv in Dunkirk, France on February 23, 2019, was retrieved, which is consistent with GOSAT and TCCON data. The near-infrared external-cavity LHR demonstrated in the present work has a high potential for use in developing a robust, broadband, unattended, and all-fiber LHR for spacecraft and ground-based atmospheric sensing that offers more channel selection for inversion.Show less >

Language :

Anglais

Popular science :

Non

Collections :

• Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM) - UMR 8523

Source :

Harvested from HAL