Echoing Characteristics of Coherent Lidar in Different Aerosol Environments

Xiao Dong; Yihua Hu; Shilong Xu; Hao Liu

doi:10.3788/AOS201838.0101001

Acta Optica Sinica, Volume. 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

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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Figures & Tables(9)

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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Table 1. Environment components of typical aerosols

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Table 1. Environment components of typical aerosols

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 2. Distribution parameters of typical aerosol components

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Table 2. Distribution parameters of typical aerosol components

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 3. Backscattering echoing characteristics of different aerosol components

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Table 3. Backscattering echoing characteristics of different 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 4. Backscattering echoing characteristics of different aerosol environments

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Table 4. Backscattering echoing characteristics of different aerosol environments

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

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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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Paper Information

Category: Atmospheric Optics and Oceanic Optics

Received: May. 9, 2017

Accepted: --

Published Online: Aug. 31, 2018

The Author Email: Dong Xiao (skl_dongxiao@163.com)

DOI:10.3788/AOS201838.0101001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology