Researching | Experimental Research on Laser Active Coherent Array Imaging through Horizontal Transimission in Real Atmosphere

Acta Photonica Sinica, Volume. 50, Issue 12, 1201004(2021)

Experimental Research on Laser Active Coherent Array Imaging through Horizontal Transimission in Real Atmosphere

Yu ZHANG^1,2,3,4, Zhiguo LI^1,2,3,4, Hui LIU^1,2,3, Minglai CHEN^1,2,3, Xiujuan LUO^1,2,3, Caiwen MA^1,2,3, and Huaili ZHANG^5、*

Author Affiliations

¹Xi′an Institute of Optics and Precision Mechanics， Chinese Academy of Science， Xi′an710119， China

²Key Lab of Space Precision Measurement Technology， Chinese Academy of Science， Xi′an710119， China

³University of Chinese Academy of Science， Beijing 100084， China

⁴Pilot National Laboratory for marine science and technology， Qingdao ， Shandong 266200， China

⁵Space Engineering University， Beijing 101499， China

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Figures&Tables (18)

References (18)

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Figures & Tables(18)

Fig. 1. Target and imaging concept of laser coherent scan array imaging

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Fig. 2. Concept of relationship between fringe direction and object spatial information

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Fig. 3. T shape transmitter array with moving aperture

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Fig. 4. Interfering fringes generated by 5 beams

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Fig. 5. Picture of T shape transmitter array with moving aperture

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Fig. 6. Illustration of energy receiving test

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Fig. 7. Simulated object imaging results by single Fresnel mirror and Fresnel-silver reflected mirror array

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Fig. 8. Illustration of energy receiving using double mirror

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Fig. 9. Control interface of data processing from double receiving mirror

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Fig. 10. Reconstruction effect of different gain ratio from two channel

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Fig. 11. Waveform comparison between original signal and band-filter signal

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Fig. 12. Spectrum comparison between original signal and band-filter signal

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Fig. 13. Image reconstruction from original signal

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Fig. 14. Image reconstruction from band-filter signal

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Fig. 15. Image reconstruction combining different methods

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Fig. 16. Image reconstruction of object with 5 mm detail in 1.2 km range

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Table 1. Atmospheric turbulence classification with different $C_{n}^{2}$

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Table 1. Atmospheric turbulence classification with different $C_{n}^{2}$

Turbulence intensity	$C_{n}^{2}$
Very weak	$C_{n}^{2} < 6 \times 10^{- 16} m^{- 2 / 3}$
Weak	$6 \times 10^{- 16} m^{- 2 / 3} < C_{n}^{2} < 6 \times 10^{- 15} m^{- 2 / 3}$
Medium	$6 \times 10^{- 15} m^{- 2 / 3} < C_{n}^{2} < 6 \times 10^{- 14} m^{- 2 / 3}$
Strong	$6 \times 10^{- 14} m^{- 2 / 3} < C_{n}^{2} < 6 \times 10^{- 13} m^{- 2 / 3}$
Very strong	$C_{n}^{2} > 6 \times 10^{- 13} m^{- 2 / 3}$

Table 2. Relationship between turbulence parameter and horizontal transmission range

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Table 2. Relationship between turbulence parameter and horizontal transmission range

Different equivalent method	Relationship between transmission range L and turbulence parameter
Equivalent with coherent length $r_{0}$	$r_{0} = (0.423 k^{2} C_{n}^{2} {L)}^{- 3 / 5}$
Equivalent with coherent length isoplanatic angle $θ_{0}$	$θ_{0} = (1.09 k^{2} C_{n}^{2} L^{8 / 3})^{- 3 / 5}$
Equivalent with scintillation index ${σ_{R}}^{2}$	${σ_{R}}^{2} (L) = 1.23 C_{n}^{2} k^{7 / 6} L^{11 / 6}$

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Yu ZHANG, Zhiguo LI, Hui LIU, Minglai CHEN, Xiujuan LUO, Caiwen MA, Huaili ZHANG. Experimental Research on Laser Active Coherent Array Imaging through Horizontal Transimission in Real Atmosphere[J]. Acta Photonica Sinica, 2021, 50(12): 1201004

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Paper Information

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Received: May. 11, 2021

Accepted: Aug. 3, 2021

Published Online: Jan. 25, 2022

The Author Email: ZHANG Huaili (18786698@qq.com)

DOI:10.3788/gzxb20215012.1201004

Topics

laser devices and laser physics

Lasers and Laser Optics

laser manufacturing

Instrumentation, Measurement and Metrology