Echoing Characteristics of Coherent Lidar in Different Aerosol Environments

Xiao Dong; Yihua Hu; Shilong Xu; Hao Liu

doi:10.3788/AOS201838.0101001

Journals >Acta Optica Sinica >Volume 38 >Issue 1 >Page 0101001 > Article

Acta Optica Sinica
Vol. 38, Issue 1, 0101001 (2018)

Echoing Characteristics of Coherent Lidar in Different Aerosol Environments

Xiao Dong^1、*, Yihua Hu^1、2, Shilong Xu¹, and Hao Liu²

Author Affiliations

¹Key Laboratory of Electronic Restriction Technology of Anhui, State Key Laboratory of Pulsed Power Laser Technology,Electronic Engineering Institute of PLA, Hefei, Anhui 230037, China

²Key Laboratory of Space Active Opto-Electronics Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China

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DOI: 10.3788/AOS201838.0101001 Cite this Article Set citation alerts

Xiao Dong, Yihua Hu, Shilong Xu, Hao Liu. Echoing Characteristics of Coherent Lidar in Different Aerosol Environments[J]. Acta Optica Sinica, 2018, 38(1): 0101001 Copy Citation Text

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Fig. 1. Diagram of scattering of aerosol particles. (a) Simulation process of scattering; (b) working process of coherent pulsed lidar

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Fig. 2. Depolarization ratios of different aerosol components at 1.5 μm

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Fig. 3. Polarization ratios of different aerosol components at 1.5 μm

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Fig. 4. Depolarization ratios of different aerosol components at 2.0 μm

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Fig. 5. Polarization ratios of different aerosol components at 2.0 μm

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Aerosol type	$\begin{matrix} {N_{i}}_{} \end{matrix}$ /cm^-3	Component 1	$\begin{matrix} {R_{1}}_{} \end{matrix}$ /%	Component 2	$\begin{matrix} {R_{2}}_{} \end{matrix}$ /%	Component 3	$\begin{matrix} {R_{3}}_{} \end{matrix}$ /%
Continental	15300	WASO	45.75	SOOT	54.25	Insoluble	0.26×10^-2
Urban	15800	WASO	17.72	SOOT	82.28	Insoluble	0.94×10^-3
Maritime	1520	WASO	98.68	SSAM	1.32	Sea salt (coarse)	0.21×10^-3
Desert	2300	WASO	86.96	MINM	11.72	MIAM	1.32

Table 1. Environment components of typical aerosols

Particle type	$\begin{matrix} {r_{modN}}_{} \end{matrix}$ /μm	σ /μm	n_r1	n_i1	n_r2	n_i2
WASO	0.021	2.24	1.333	1.595×10^-3	1.313	1.532×10^-3
SSAM	0.210	2.03	1.322	2.034×10^-4	1.307	1.099×10^-3
MIAM/MINM	0.400/0.070	2.00/1.95	1.530	5.700×10^-3	1.530	7.600×10^-3
SOOT	0.012	2.00	1.770	0.460	1.800	0.490

Table 2. Distribution parameters of typical aerosol components

Type	δ₁	δ_rms1	P₁	P_rms1	N₁	δ₂	δ_rms2	P₂	P_rms2	N₂
SOOT	0.039	0.064	0.942	0.034	0.44	0.045	0.051	0.937	0.026	0.36
MINM	0.024	0.073	0.955	0.008	75.08	0.028	0.084	0.948	0.007	62.01
MIAM	0.109	0.066	0.804	0.004	37.74	0.086	0.067	0.854	0.003	46.65
WASO₁	0.038	0.127	0.932	0.017	12.65	0.032	0.087	0.940	0.004	10.99
WASO₂	0.034	0.095	0.937	0.011	22.98	0.031	0.087	0.942	0.004	20.47
WASO₃	0.030	0.112	0.946	0.015	72.24	0.030	0.087	0.945	0.004	57.55
SSAM₁	0.057	0.113	0.940	0.026	68.48	0.041	0.133	0.933	0.017	72.26
SSAM₂	0.064	0.084	0.910	0.019	52.30	0.050	0.121	0.917	0.024	67.42
SSAM₃	0.097	0.105	0.859	0.023	21.14	0.065	0.143	0.905	0.019	29.43

Table 3. Backscattering echoing characteristics of different aerosol components

Parameter	Continent (average)		Maritime (clean)		Urban		Desert
Parameter	1.5 μm	2.0 μm	1.5 μm	2.0 μm	1.5 μm	2.0 μm	1.5 μm	2.0 μm
δ	0.034	0.031	0.039	0.035	0.034	0.032	0.056	0.049
P	0.937	0.942	0.932	0.935	0.937	0.941	0.898	0.908
$\begin{matrix} {N_{r}}_{} \end{matrix}$ /arb. units	108.29	96.24	23.37	21.09	46.15	40.80	38.44	36.44

Table 4. Backscattering echoing characteristics of different aerosol environments

Xiao Dong, Yihua Hu, Shilong Xu, Hao Liu. Echoing Characteristics of Coherent Lidar in Different Aerosol Environments[J]. Acta Optica Sinica, 2018, 38(1): 0101001

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