Influence of Outer Scale of Ocean Turbulence on Propagation Characteristics of Gaussian Beams

Yi YANG; Huan NIE; Xiaobo WANG; Jianlei ZHANG; Hanyu HE; Xiaofen QIU; Yunzhou ZHU

doi:10.3788/gzxb20235204.0401002

Acta Photonica Sinica, Volume. 52, Issue 4, 0401002(2023)

Influence of Outer Scale of Ocean Turbulence on Propagation Characteristics of Gaussian Beams

Yi YANG1... Huan NIE1,*, Xiaobo WANG2, Jianlei ZHANG1, Hanyu HE1, Xiaofen QIU1 and Yunzhou ZHU2 |Show fewer author(s)

Author Affiliations

¹School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, China

²Key Laboratory of Underwater Information and Control, China Shipbuilding Industry Corporation；705 Research Institute, Xi'an 710077, China

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Figures & Tables(16)

$Modified spectra of Nikishov turbulence refractive index power spectra under three outer scale models$

Fig. 1. Modified spectra of Nikishov turbulence refractive index power spectra under three outer scale models

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$The relationship between the standardized spectrum of refractive index fluctuations and the outer scale$

Fig. 2. The relationship between the standardized spectrum of refractive index fluctuations and the outer scale

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Fig. 3. Phase screen model of seawater channel physics and equivalents

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Fig. 4. Phase structure function under different compensation orders

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Fig. 5. Turbulent phase screen generated by power spectrum inversion method without harmonics and third harmonic compensation

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Fig. 6. PDF curves at different transmission distances and outer scales

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Fig. 7. Relationship between centroid drift and transmission distance under different outer scales

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Fig. 8. Relationship between beam expansion and transmission distance under different outer scales

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Fig. 9. Relationship between scintillation index and transmission distance under different outer scales

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Fig. 10. Centroid location distribution map

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Fig. 11. Time-domain simulation of infinite outer scale turbulence

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Fig. 12. Time domain simulation diagram of 2 m outer scale turbulence

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Fig. 13. Time domain simulation diagram of 1 m outer scale turbulence

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Fig. 14. Fitting curve of turbulence time domain expansion

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Table 1. Relationship between time domain broadening and transmission distance

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Table 1. Relationship between time domain broadening and transmission distance

Outer scale	Time domain broadening under different transmission distance/ns
Outer scale	20 m	30 m	40 m	50 m
1 m	8.4× $10^{- 5}$	1.8× $10^{- 4}$	2.9× $10^{- 4}$	6.4× $10^{- 4}$
2 m	9.6× $10^{- 5}$	1.8× $10^{- 4}$	3.1× $10^{- 4}$	6.1× $10^{- 4}$
Outer scale infinity	8.3× $10^{- 5}$	2.2× $10^{- 4}$	2.5× $10^{- 4}$	5.4× $10^{- 4}$

Table 2. Relationship between outer scale and time domain spread function
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Table 2. Relationship between outer scale and time domain spread function
Outer scale Time domain expansion（20 m≤L≤50 m）/ns
1 m 6.1× $10^{- 7}$ × $L^{2}$ -2.5× $10^{- 5}$ ×L+0.000 35
2 m 5.4× $10^{- 7}$ × $L^{2}$ -2.09× $10^{- 5}$ ×L+0.000 304
Outer scale infinity 3.6× $10^{- 7}$ × $L^{2}$ -1.1× $10^{- 5}$ ×L+0.000 18

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Yi YANG, Huan NIE, Xiaobo WANG, Jianlei ZHANG, Hanyu HE, Xiaofen QIU, Yunzhou ZHU. Influence of Outer Scale of Ocean Turbulence on Propagation Characteristics of Gaussian Beams[J]. Acta Photonica Sinica, 2023, 52(4): 0401002

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