Dynamic Propagation Characteristics of 1.55-μm Wavelength Laser in Rain and Fog Coexisting Weather

Renjiao Yu; Zhenhua Li; Jiancheng Lai; Chunyong Wang; Zhixiang Wu

doi:10.3788/CJL202148.1306002

Chinese Journal of Lasers, Volume. 48, Issue 13, 1306002(2021)

Dynamic Propagation Characteristics of 1.55-μm Wavelength Laser in Rain and Fog Coexisting Weather

Renjiao Yu^*, Zhenhua Li^**, Jiancheng Lai, Chunyong Wang, and Zhixiang Wu

Author Affiliations

School of Science, Nanjing University of Science & Technology, Nanjing, Jiangsu 210094, China

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Figures & Tables(8)

Fig. 1. Relationship between fog attenuation and time. (a) Radiation fog; (b) advection fog

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Fig. 2. Time dependence of transmissivity. (a) Radiation fog; (b) advection fog

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Fig. 3. Time dependence of transmissivity under different transmission distances. (a) 100 m; (b) 1000m

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Table 1. Related parameters of different rainfall types
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Table 1. Related parameters of different rainfall types
Type of rainfall Rain rate R /(mm·h^-1) Number density N_d /m^-3 Average scale D_dg /mm Standard deviation σ_dg
Light rain 1 172.00 0.72 2.0
Moderate rain 10 285.45 1.22 2.0
Heavy rain 100 473.73 2.08 2.0

Table 2. Attenuation coefficient of rain with different rain rates
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Table 2. Attenuation coefficient of rain with different rain rates
R /(mm·h^-1) 1 10 100
μ_r /km^-1 0.362 1.78 7.20

Table 3. Parameters of rain
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Table 3. Parameters of rain
g μ_r /m^-1 ω
0.8545 0.362×10^-3 0.6801

Table 4. Variation of radiation fog parameters with time
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Table 4. Variation of radiation fog parameters with time
Parameter 0 h 0.5 h 1 h 2 h 3 h 4 h 5 h
g 0.8313 0.8304 0.8361 0.8317 0.8360 0.8304 0.8332
μ_f /m^-1 0.0058 0.0054 0.0051 0.0046 0.0042 0.0040 0.0038
ω 0.9991 0.9991 0.9992 0.9992 0.9992 0.9992 0.9992

Table 5. Variation of advection fog parameters with time
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Table 5. Variation of advection fog parameters with time
Parameter 0 h 0.5 h 1 h 2 h 3 h 4 h 5 h
g 0.8015 0.7955 0.7940 0.8019 0.8201 0.8336 0.8421
μ_f /m^-1 0.0044 0.0020 8.81×10^-4 2.56×10^-4 1.28×10^-4 8.69×10^-5 6.76×10^-5
ω 0.9945 0.9953 0.9960 0.9976 0.9986 0.9989 0.9991

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Renjiao Yu, Zhenhua Li, Jiancheng Lai, Chunyong Wang, Zhixiang Wu. Dynamic Propagation Characteristics of 1.55-μm Wavelength Laser in Rain and Fog Coexisting Weather[J]. Chinese Journal of Lasers, 2021, 48(13): 1306002

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