Fei Gao, Bo Huang, Dongchen Shi, Qingsong Zhu, Rui Zhang, Li Wang, Shichun Li, and Dengxin Hua*
Author Affiliations
School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an, Shaanxi 710048, Chinashow less
Fig. 1. Spectral relative intensity distribution. (a) Mie-Rayleigh scattering spectrum; (b) pure rotational Raman spectra
Fig. 2. Spectral intensity diagram of solar radiation
Fig. 3. Ozone absorption scattering cross sections of
Fig. 4. Measurement uncertainty of relative temperature under different temperature pairs (All ΔT are the results of the ratio processing of the minimum value of the corresponding graph). (a) Anti-Stokes (225 K, 220 K); (b) Anti-Stokes (250 K, 245 K); (c) Anti-Stokes 270 K; (d) Stokes (225 K, 220 K); (e) Stokes(250 K,245 K); (f) Stokes (275 K,270 K)
Fig. 5. Schematic of solar-blind ultraviolet pure rotational Raman lidar system
Fig. 6. Diffraction grating spectrometers. (a) Single diffraction; (b) double diffractions
Fig. 7. Comparison of diffraction spots of grating spectrometer. (a) Single diffraction; (b) double diffraction
Fig. 8. triple-diffraction double grating polychromator
Fig. 9. Comparison of diffraction spots. (a) Double diffraction spot; (b) triple diffraction spot
Fig. 10. Effect ofozone on detection of solar-blind Raman lidar. (a) Difference of atmospheric transmission due to ozone absorption cross section of pure rotational Raman spectra; (b) effect of atmospheric transmission with and without ozone absorption
Fig. 11. Fluorescence intensity of biomolecules for 266 nm excitation[22]
Fig. 12. Simulation results of solar-blind ultraviolet pure rotational Raman lidar. (a) Signal intensity of each channel; (b) signal-to-noise ratio of each channel
Molecule | B0 /cm-1 | gJ(even) | gJ(odd) | I | γ2 /(1cm6) | h /(J∙s) | c /(m∙s-1) | k /(J∙K-1) |
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N2 | 1.989500 | 6 | 3 | 1 | 0.509 | 6.626×10-34 | 2.9979×108 | 1.38×10-23 | O2 | 1.137682 | 0 | 1 | 0 | 1.27 | | | |
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Table 1. Relevant parameters of pure rotational Raman spectra
Parameter | Value | Parameter | Value |
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Transmitter Nd…YAG pulsed laser | Wavelength /nm | 266.0 | | Receiver Cassegrain telescope | Diameter /mm | 400 | | Repetition rate /nm | 10 | Focal length /mm | 3000 | Pulse energy /nm | 150 | Field of view /mrad | 0.2 | Grating(G) | Groove number /(line·mm-1) | 3600 | | Mirror(M)/Lens(L) | Dimension(M)/(mm×mm×mm) | 112×112×20 | | Blazed wavelength /nm | 230 | Focal length(L) /mm | 250 | Dimension /(mm×mm×mm) | 120×100×20 | Diameter(L) /mm | 125 | Detector PMT(HamamatsuR7154) | Quantum efficiency | 0.23 | | Fiber | Diameter /μm | 300-500 | Gain | 1.0×107 |
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Table 2. Parameters of solar-blind ultraviolet pure rotational Raman lidar system