Simultaneous remote sensing of multiple atmospheric gases (CO, CH, and HO) based on an all-fiber laser heterodyne spectroradiometer
Applied Physics B: Lasers and Optics, ISSN: 0946-2171, Vol: 129, Issue: 8
2023
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Most Recent News
Recent Research from Zhejiang University Highlight Findings in Technology [Simultaneous Remote Sensing of Multiple Atmospheric Gases (Co2, Ch4, and H2o) Based On an All-fiber Laser Heterodyne Spectroradiometer]
2023 AUG 22 (NewsRx) -- By a News Reporter-Staff News Editor at Tech Daily News -- Current study results on Technology have been published. According
Article Description
We report an all-fiber, near-infrared laser heterodyne radiometer (LHR) that uses two distributed feedback (DFB) diode lasers as local oscillators. This scheme allows the retrieval of the column abundances of multiple atmospheric gases of CH, CO, and HO. To improve the detection efficiency, we operated the two DFB diode lasers emitting at 1653 and 1568 nm simultaneously within one scanning cycle. The duration of one scanning cycle was experimentally determined to be 2 s. An atmospheric transmission spectrum of multi-gas was observed within 20 s after averaging ten times. This approach has simplified the sensing system and reduced the probability of being affected by the rapid and random fluctuation of solar radiation due to clouds. We regulated the laser power, and hence, the amplitudes of background heterodyne signals excited by the two local oscillators, to accurately measure the transmission spectrum of each gas species. The results of the sun-tracking observations of this LHR sensor show good agreement with the data taken simultaneously by the GOSAT satellite.
Bibliographic Details
Springer Science and Business Media LLC
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