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A fibered near-infrared laser heterodyne radiometer for simultaneous remote sensing of atmospheric CO2 and CH4
Optics and Lasers in Engineering ( IF 4.6 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.optlaseng.2020.106083 Jingjing Wang , Chunyan Sun , Guishi Wang , Mingmin Zou , Tu Tan , Kun Liu , Weidong Chen , Xiaoming Gao
Optics and Lasers in Engineering ( IF 4.6 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.optlaseng.2020.106083 Jingjing Wang , Chunyan Sun , Guishi Wang , Mingmin Zou , Tu Tan , Kun Liu , Weidong Chen , Xiaoming Gao
Abstract The performance of an all fibered near-infrared laser heterodyne radiometer (NIR-LHR) is demonstrated in ground-based solar occultation mode. A 1 × 2 fiber optical switch is employed as an alternative modulator to traditional chopper, which makes the system more stable and compact. Two distribute feedback (DFB) lasers centered at 1.6 μm and 1.65 μm, are employed as local oscillators to probe absorption lines of CO2 and CH4, respectively. After data processing and retrieval, column-averaged abundances and the mixing ratio of atmospheric CO2 and CH4 are determined based on the measurement of over six months in our laboratory (Hefei, China, 31.9°N 117.16°E). Finally, the results are validated by comparison with the GOSAT results during the same time period. The reported all fibered laser heterodyne radiometer in this manuscript has great potential to be a portable and high spectral resolution instrument for atmospheric remote sensing of multi-component gases.
更新日期：2020-06-01
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