Field measurement of atmospheric CO₂ column abundance based on portable laser heterodyne radiometer
This study presents a portable near-infrared laser heterodyne radiometer specifically designed for measuring the column abundance of atmospheric carbon dioxide (CO₂) in the Taiyuan area. The instrument modulates the solar radiation using a fiber optic switch and amplifies the solar radiation through...
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Frontiers Media S.A.
2025-02-01
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| Series: | Frontiers in Physics |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fphy.2025.1553252/full |
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| author | Yong Wang Yong Wang Maolei Zhang Maolei Zhang Jiapeng Wang Jiapeng Wang Gang Wang Gang Wang Ruyue Cui Ruyue Cui Lei Dong Lei Dong Hongpeng Wu Hongpeng Wu |
| author_facet | Yong Wang Yong Wang Maolei Zhang Maolei Zhang Jiapeng Wang Jiapeng Wang Gang Wang Gang Wang Ruyue Cui Ruyue Cui Lei Dong Lei Dong Hongpeng Wu Hongpeng Wu |
| author_sort | Yong Wang |
| collection | DOAJ |
| description | This study presents a portable near-infrared laser heterodyne radiometer specifically designed for measuring the column abundance of atmospheric carbon dioxide (CO₂) in the Taiyuan area. The instrument modulates the solar radiation using a fiber optic switch and amplifies the solar radiation through a semiconductor optical amplifier. The local oscillator laser is progressively scanned at the strong absorption characteristic of 1572.02 nm. Two beams of light are mixed on the photodetector to produce a heterodyne signal. To enhance performance, the radio frequency (RF) circuit system of the radiometer was thoroughly optimized, including adjustments to the filter bandwidth and the integration time of the lock-in amplifier. These improvements significantly enhanced the spectral signal-to-noise ratio (SNR) to a high level of 130 and achieved a spectral resolution of 0.0083 cm⁻1. The laser heterodyne signals were demodulated using a lock-in amplifier. Furthermore, a forward model based on line-by-line integration and an iterative fitting algorithm were employed to achieve high-precision CO₂ column abundance calculations. Outdoor field measurements conducted at Shanxi University validated the feasibility and practicality of this approach, laying a solid foundation for its broader application. |
| format | Article |
| id | doaj-art-9c10cb3da1e44a088ac3921829a05661 |
| institution | Kabale University |
| issn | 2296-424X |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physics |
| spelling | doaj-art-9c10cb3da1e44a088ac3921829a056612025-02-04T05:28:02ZengFrontiers Media S.A.Frontiers in Physics2296-424X2025-02-011310.3389/fphy.2025.15532521553252Field measurement of atmospheric CO₂ column abundance based on portable laser heterodyne radiometerYong Wang0Yong Wang1Maolei Zhang2Maolei Zhang3Jiapeng Wang4Jiapeng Wang5Gang Wang6Gang Wang7Ruyue Cui8Ruyue Cui9Lei Dong10Lei Dong11Hongpeng Wu12Hongpeng Wu13State Key Laboratory of Quantum Optics Technologies and Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, ChinaCollaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, ChinaState Key Laboratory of Quantum Optics Technologies and Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, ChinaCollaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, ChinaState Key Laboratory of Quantum Optics Technologies and Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, ChinaCollaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, ChinaState Key Laboratory of Quantum Optics Technologies and Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, ChinaCollaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, ChinaState Key Laboratory of Quantum Optics Technologies and Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, ChinaCollaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, ChinaState Key Laboratory of Quantum Optics Technologies and Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, ChinaCollaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, ChinaState Key Laboratory of Quantum Optics Technologies and Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, ChinaCollaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, ChinaThis study presents a portable near-infrared laser heterodyne radiometer specifically designed for measuring the column abundance of atmospheric carbon dioxide (CO₂) in the Taiyuan area. The instrument modulates the solar radiation using a fiber optic switch and amplifies the solar radiation through a semiconductor optical amplifier. The local oscillator laser is progressively scanned at the strong absorption characteristic of 1572.02 nm. Two beams of light are mixed on the photodetector to produce a heterodyne signal. To enhance performance, the radio frequency (RF) circuit system of the radiometer was thoroughly optimized, including adjustments to the filter bandwidth and the integration time of the lock-in amplifier. These improvements significantly enhanced the spectral signal-to-noise ratio (SNR) to a high level of 130 and achieved a spectral resolution of 0.0083 cm⁻1. The laser heterodyne signals were demodulated using a lock-in amplifier. Furthermore, a forward model based on line-by-line integration and an iterative fitting algorithm were employed to achieve high-precision CO₂ column abundance calculations. Outdoor field measurements conducted at Shanxi University validated the feasibility and practicality of this approach, laying a solid foundation for its broader application.https://www.frontiersin.org/articles/10.3389/fphy.2025.1553252/fulllaser heterodynecarbon dioxidecolumn abundanceportablegreenhouse gas |
| spellingShingle | Yong Wang Yong Wang Maolei Zhang Maolei Zhang Jiapeng Wang Jiapeng Wang Gang Wang Gang Wang Ruyue Cui Ruyue Cui Lei Dong Lei Dong Hongpeng Wu Hongpeng Wu Field measurement of atmospheric CO₂ column abundance based on portable laser heterodyne radiometer Frontiers in Physics laser heterodyne carbon dioxide column abundance portable greenhouse gas |
| title | Field measurement of atmospheric CO₂ column abundance based on portable laser heterodyne radiometer |
| title_full | Field measurement of atmospheric CO₂ column abundance based on portable laser heterodyne radiometer |
| title_fullStr | Field measurement of atmospheric CO₂ column abundance based on portable laser heterodyne radiometer |
| title_full_unstemmed | Field measurement of atmospheric CO₂ column abundance based on portable laser heterodyne radiometer |
| title_short | Field measurement of atmospheric CO₂ column abundance based on portable laser heterodyne radiometer |
| title_sort | field measurement of atmospheric co₂ column abundance based on portable laser heterodyne radiometer |
| topic | laser heterodyne carbon dioxide column abundance portable greenhouse gas |
| url | https://www.frontiersin.org/articles/10.3389/fphy.2025.1553252/full |
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