Volume 14 Issue 3
May  2021
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WANG Yu-Zhao, TAO Yu-Liang, SUN Hai-Qing, YANG Chao. Carbon dioxide detection technology based on the laser occultation absorption spectrum[J]. Chinese Optics, 2021, 14(3): 634-642. doi: 10.37188/CO.2020-0201
Citation: WANG Yu-Zhao, TAO Yu-Liang, SUN Hai-Qing, YANG Chao. Carbon dioxide detection technology based on the laser occultation absorption spectrum[J]. Chinese Optics, 2021, 14(3): 634-642. doi: 10.37188/CO.2020-0201

Carbon dioxide detection technology based on the laser occultation absorption spectrum

doi: 10.37188/CO.2020-0201
Funds:  Supported by Civil Aerospace 13 th Five-Year Pre-research Project (No. D040105)
More Information
  • Corresponding author: zz0525wyz@163.com
  • Received Date: 28 Dec 2020
  • Rev Recd Date: 08 Jan 2021
  • Available Online: 27 Mar 2021
  • Publish Date: 14 May 2021
  • The advantages and disadvantages of fixed-wavelength laser occultation differential absorption technology are analyzed, and the measurement principle of tunable laser direct absorption spectroscopy technology is introduced. The relationship between optimal wavelength transmittance and signal-to-noise ratio and the relationship between measurement error and background light interference are analyzed. According to the working wavelength range of the high-sensitivity detector, 6310.915 cm−1, 6310.893 cm−1, 6310.890 cm−1 and 6310.8834 cm−1 are selected as the absorption working wavelengths, and 6310.15 cm−1 is selected as the reference wavelength, and the detection ability of each wavelength is simulated and analyzed. Simulation results show that the detection error of a CO2 concentration is better than 0.9% in the range of 5~35 km and better than 0.4% in the range of 7~42 km with a vertical resolution of 1 km. This technology reduces the cost and complexity of the system, and is beneficial to the design and implementation of space-borne products.

     

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