Influence of Performance Parameters of Optical Devices on Depolarization Ratio of Lidar Detection of Aerosols and Clouds

Laibin Wang; Dong Liu

doi:10.3788/AOS222147

Acta Optica Sinica, Volume. 43, Issue 24, 2428002(2023)

Influence of Performance Parameters of Optical Devices on Depolarization Ratio of Lidar Detection of Aerosols and Clouds

Laibin Wang^1,2 and Dong Liu^1、*

Author Affiliations

¹Key Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Heifei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui , China

²Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, Anhui , China

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Figures & Tables(13)

Fig. 1. Dual-wavelength polarized lidar system structure

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Fig. 2. Rotation angle in the rotation matrix

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Fig. 3. Operating principle of dichroic mirror

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Fig. 4. Depolarization ratio of the simulated light through the dichroic mirror changes with polarization error angle. (a) Dust at 1064 nm; (b) dust at 532 nm

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Fig. 5. Relative error of the simulated light through the dichroic mirror changes with the polarization error angle

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Fig. 6. Operating principle of polarization beam splitter

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Fig. 7. Polarization ratio of the simulated light through polarization beam splitter changes with polarization error angle. (a) Dust at 532 nm; (b) dust at 1064 nm; (c) cirrus cloud at 532 nm

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Fig. 8. Schematic diagram of the cascade of dichroic mirror and polarization beam splitter

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Fig. 9. Effect of the cascade of dichroic mirror and polarization beam splitter on the depolarization ratio of signal. (a) Dust at 532 nm; (b) dust at 1064 nm; (c) cirrus cloud at 532 nm

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Fig. 10. Relative error change of the polarization ratio through the dichroic mirror and the polarization beam splitter

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Table 1. DMLP900 reflection and transmission coefficient
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Table 1. DMLP900 reflection and transmission coefficient
Transmittance and reflectance $T_{s, 1064 n m}$ $T_{p, 1064 n m}$ $R_{s, 532 n m}$ $R_{p, 532 n m}$
Value 0.92026657 0.99059204 0.98176420 0.95334085

Table 2. Influence of dichroic mirror on the signal depolarization ratio when incident on different polarization directions

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Table 2. Influence of dichroic mirror on the signal depolarization ratio when incident on different polarization directions

Types of light source	Parallel polarization		Skeptical polarization		$Δ$ /%
Types of light source	$δ_{i} (P_{s} / P_{p})$	$δ_{o} (P_{s} / P_{p})$	$δ_{i} (P_{p} / P_{s})$	$δ_{o} (P_{p} / P_{s})$	Parallel	Skeptical
Dust （532 nm）	0.300	0.309	0.300	0.308	3.012	2.895
Dust （1064 nm）	0.225	0.209	0.225	0.242	7.111	7.642

Table 3. Effect of polarization beam splitter on depolarization ratio of signal with $θ = 0 °$

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Table 3. Effect of polarization beam splitter on depolarization ratio of signal with $θ = 0 °$

Types of light source	Parallel polarization		Skeptical polarization		$Δ$ /%
Types of light source	$δ_{i} (P_{s} / P_{p})$	$δ_{o} (P_{s} / P_{p})$	$δ_{i} (P_{p} / P_{s})$	$δ_{o} (P_{p} / P_{s})$	Parallel	Skeptical
Dust（532 nm）	0.300	0.364	0.300	0.294	21.333	2.156
Dust（1064 nm）	0.225	0.286	0.225	0.223	27.300	0.680
Cirrus cloud（532 nm）	0.500	0.571	0.500	0.478	14.200	4.433

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Laibin Wang, Dong Liu. Influence of Performance Parameters of Optical Devices on Depolarization Ratio of Lidar Detection of Aerosols and Clouds[J]. Acta Optica Sinica, 2023, 43(24): 2428002

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Paper Information

Category: Remote Sensing and Sensors

Received: Dec. 15, 2022

Accepted: Mar. 15, 2023

Published Online: Dec. 8, 2023

The Author Email: Liu Dong (dliu@aiofm.cas.cn)

DOI:10.3788/AOS222147

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. DMLP900 reflection and transmission coefficient

Table 1. DMLP900 reflection and transmission coefficient

Table 2. Influence of dichroic mirror on the signal depolarization ratio when incident on different polarization directions

Table 2. Influence of dichroic mirror on the signal depolarization ratio when incident on different polarization directions

Table 3. Effect of polarization beam splitter on depolarization ratio of signal with θ=0°

Table 3. Effect of polarization beam splitter on depolarization ratio of signal with θ=0°

Table 3. Effect of polarization beam splitter on depolarization ratio of signal with $θ = 0 °$

Table 3. Effect of polarization beam splitter on depolarization ratio of signal with $θ = 0 °$