Influence of Ultraviolet Wavelength Selection on Detection Performance of All-Day Water Vapor Raman Lidar

Dongchen Shi; Dengxin Hua; Bo Huang; Ning Lei; Fei Gao

doi:10.3788/AOS201838.1228003

Acta Optica Sinica, Volume. 38, Issue 12, 1228003(2018)

Influence of Ultraviolet Wavelength Selection on Detection Performance of All-Day Water Vapor Raman Lidar

Dongchen Shi^*, Dengxin Hua^*, Bo Huang, Ning Lei, and Fei Gao

Author Affiliations

School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an, Shaanxi 710048, China

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Figures & Tables(12)

Fig. 1. Spectrum of atmospheric backscattering signal

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Fig. 2. Raman backscattering coefficients of N2 and H2O with excitation wavelengths of 354.7 nm and 266.0 nm

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Fig. 3. (a) Extinction coefficient profiles and atmospheric transmissivity in standard atmosphere model, and (b) product between Raman backscattering coefficient and atmospheric transmissivity when excitation wavelengths are 354.7 nm and 266.0 nm

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Fig. 4. (a) Ozone absorption coefficients for two kinds of ultraviolet wavelengths; (b) diurnal variation rule of ozone hourly concentrated in Xi’an main city

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Fig. 5. (a) Ozone absorption of atmospheric two-way transmissivity during daytime and nighttime; (b) product between Raman backscattering coefficient and atmospheric transmissivity at 266.0 nm and 354.7 nm bands when ozone attenuation is considered

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Fig. 6. (a) Polychromator at 54.7 nm; (b) polychromator at 266.0 nm

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Fig. 7. Solar illumination spectra along normal directions on top of atmospheric layer and surface of earth

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Fig. 8. Atmospheric backscattering ratio Rb for standard atmospheric model and cloud model

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Fig. 9. (a) Clear and (b) cloudy daytime signal-to-noise ratio of N2 and H2O of two ultraviolet wavelengths

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Table 1. Vibration Raman frequency shift, Raman central wavelength, and backscattering cross section of O2, N2, and H2O with excitation wavelengths of 354.7 nm and 266.0 nm

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Table 1. Vibration Raman frequency shift, Raman central wavelength, and backscattering cross section of O2, N2, and H2O with excitation wavelengths of 354.7 nm and 266.0 nm

Molecule k	Raman frequency shift /cm^-1	Raman central wavelength /nm		$\begin{matrix} \frac{dσ (λ_{354 . 7_{k}})}{dΩ} \end{matrix}$ /(cm²·sr^-1)	$\begin{matrix} \frac{dσ (λ_{266 . 0_{k}})}{dΩ} \end{matrix}$ /(cm²·sr^-1)
Molecule k	Raman frequency shift /cm^-1			Excitation wavelength 354.7 nm	Excitation wavelength 266.0 nm
O₂	1555	375.8	277.5	2.25×10^-30	1.24×10^-29
N₂	2331	386.7	283.6	2.8×10^-30	9.68×10^-30
H₂O	3652	407.8	294.6	6.2×10^-3	2.28×10^-29

Table 2. Sun irradiation background noises at 266.0 nm and 354.7 nm of all Raman channels of Raman lidar
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Table 2. Sun irradiation background noises at 266.0 nm and 354.7 nm of all Raman channels of Raman lidar
Raman channel k S_b( $\begin{matrix} λ_{266 . 0_{k}} \end{matrix}$ ) /(W·m^-2·nm^-1) S_b( $\begin{matrix} λ_{354 . 7_{k}} \end{matrix}$ ) /(W·m^-2·nm^-1) P_b( $\begin{matrix} λ_{266 . 0_{k}} \end{matrix}$ ) /(10^-14 J) P_b( $\begin{matrix} λ_{354 . 7_{k}} \end{matrix}$ ) /(10^-8 J)
O₂ 0 0.4551 0 1.069
N₂ 1.46×10^-19 0.4685 0 1.100
H₂O 1.6×10^-6 0.8849 3.757 2.078

Table 3. Parameters of 354.7 nm and 266.0 nm Raman lidar system

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Table 3. Parameters of 354.7 nm and 266.0 nm Raman lidar system

Wave range of transmission and receiving system /nm	Nd∶YAG laser	Pulse energy /mJ	Pulse repetition frequency /Hz	Pulse width /ns	Detector	Quantum efficiency /%
354.7	Injection-seeded	500	10	10	Hamamatsu R3896	26
266.0	Injection-seeded	150	10	10	Hamamatsu R3896	29

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Dongchen Shi, Dengxin Hua, Bo Huang, Ning Lei, Fei Gao. Influence of Ultraviolet Wavelength Selection on Detection Performance of All-Day Water Vapor Raman Lidar[J]. Acta Optica Sinica, 2018, 38(12): 1228003

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Paper Information

Category: Remote Sensing and Sensors

Received: May. 22, 2018

Accepted: Jul. 30, 2018

Published Online: May. 10, 2019

The Author Email:

DOI:10.3788/AOS201838.1228003

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Vibration Raman frequency shift, Raman central wavelength, and backscattering cross section of O2, N2, and H2O with excitation wavelengths of 354.7 nm and 266.0 nm

Table 1. Vibration Raman frequency shift, Raman central wavelength, and backscattering cross section of O2, N2, and H2O with excitation wavelengths of 354.7 nm and 266.0 nm

Table 2. Sun irradiation background noises at 266.0 nm and 354.7 nm of all Raman channels of Raman lidar

Table 2. Sun irradiation background noises at 266.0 nm and 354.7 nm of all Raman channels of Raman lidar

Table 3. Parameters of 354.7 nm and 266.0 nm Raman lidar system

Table 3. Parameters of 354.7 nm and 266.0 nm Raman lidar system