Free-space propagation of autofocusing Airy vortex beams with controllable intensity gradients

Xu Yan; Lixin Guo; Mingjian Cheng; Shuirong Chai

doi:10.3788/COL201917.040101

Chinese Optics Letters, Volume. 17, Issue 4, 040101(2019)

Free-space propagation of autofocusing Airy vortex beams with controllable intensity gradients On the Cover

Xu Yan^1,2,3, Lixin Guo^1,2,3、*, Mingjian Cheng², and Shuirong Chai²

Author Affiliations

¹State Key Laboratory of Integrated Service Networks, Xidian University, Xi’an 710071, China

²School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China

³School of Electronic Engineering, Xidian University, Xi’an 710071, China

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Figures & Tables(6)

Fig. 1. (a) Intensity and phase distributions of AAVBs for different values of $m = 0$ , 1.6, 3, and 5 at the incident plane. (b) Normalized radial intensity plots of (a) in black, red, blue, and purple colors.

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Fig. 2. (a) Free propagating AAVBs with $m = 0$ , 1.6, 3, and 5. The side-views of AAVB propagation are given in the first column, and the focal planes are marked by the dashed line. The intensity and phase distributions of AAVBs at the focal plane are given in the second and third columns, respectively. (b) Radial intensity plots of AAVBs at the focal plane in colors. The inset shows normalized intensities, amplifying variations in the radii of the primary rings.

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Fig. 3. Multiple random phase screen model.

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Fig. 4. (a)–(d) Intensity distributions of AAVBs with $l = 3$ for different values of $m = 0$ , 1.6, 3, and 5 after propagation through a turbulent optical channel. (e)–(h) Phase cross-sections of AAVBs corresponding to (a)–(d), respectively. Insets are magnified representations of vortex splitting corresponding to the regions marked by the dashed squares, where phase and intensity patterns of each charge-one vortex are indicated by the overlaid white circles and white dotted circles, respectively.

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Fig. 5. Plots of vortex splitting ratio (V) as a function of turbulence strength ( $D / r_{0}$ ) for (a) $l = 3$ and (b) $l = 5$ .

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Table 1. Values of Parameters Used in the Simulations

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Table 1. Values of Parameters Used in the Simulations

Parameter	Value
Wavelength ( $λ$ )	1550 nm
Transverse scales ( $ω$ )	0.012 m
Truncation factor ( $a$ )	0.1
Grid numbers ( $N \times N$ )	$1024 \times 1024$
Sample grid length	$5 \times 10^{- 4} m$
Number of phase screen	50
Turbulence strength ( $D / r_{0}$ )	Varies from 0.96 to 6.6
Inner scale size	0.001 m
Outer scale size	10 m for $D / r_{0} \leq 1.67$ and 1 m for $D / r_{0} > 1.67$

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Xu Yan, Lixin Guo, Mingjian Cheng, Shuirong Chai. Free-space propagation of autofocusing Airy vortex beams with controllable intensity gradients[J]. Chinese Optics Letters, 2019, 17(4): 040101

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Paper Information

Category: Atmospheric and oceanic optics

Received: Nov. 6, 2018

Accepted: Jan. 15, 2019

Posted: Jan. 17, 2019

Published Online: Apr. 3, 2019

The Author Email: Lixin Guo (lxguo@xidian.edu.cn)

DOI:10.3788/COL201917.040101

Topics

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