Autofocusing and Self-Healing Properties of Aberration Laser Beams in a Turbulent Media,Physical Review Applied

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Autofocusing and Self-Healing Properties of Aberration Laser Beams in a Turbulent Media
Physical Review Applied ( IF 3.8 ) Pub Date : 2021-07-27 , DOI: 10.1103/physrevapplied.16.014061
Vasu Dev ₁ , Andra Naresh K. Reddy _{2,

3} , Andrey V. Ustinov ₄ , Svetlana N. Khonina _{4,

5} , Vishwa Pal ₁

Affiliation

We present the autofocusing and self-healing properties of aberration laser beams (ALBs) in a turbulent media. The ALB is generated by a diffractive optical element (DOE) whose phase profile consists of radial and periodic angular dependence, and then propagated through a turbulent media under weak, moderate, and strong turbulence conditions. The theoretical calculations, numerical simulations, and experimental results are presented. The results show that the presence of turbulence leads to distortion in the spatial structure of ALBs, as well as causes beam wandering. However, the autofocusing properties of ALBs remain invariant. Further, ALBs also possess self-healing abilities in free space as well as in a turbulent media. The self-healing sustains reasonably well even when a large portion of ALB (approximately

60 %

) is truncated. The distance requires for the self-healing of truncated ALBs remains the same for various percentage of truncation. Particularly, for any amount of truncation up to approximately

60 %

, ALB self-heals by propagating up to autofocusing distance corresponding to a nontruncated beam.

中文翻译：

像差激光束在湍流介质中的自动聚焦和自修复特性

我们展示了像差激光束 (ALB) 在湍流介质中的自动聚焦和自修复特性。ALB 由衍射光学元件 (DOE) 生成，其相位分布由径向和周期性角度依赖性组成，然后在弱、中和强湍流条件下通过湍流介质传播。给出了理论计算、数值模拟和实验结果。结果表明，湍流的存在会导致 ALB 的空间结构失真，并导致光束漂移。然而，ALB 的自动对焦特性保持不变。此外，ALB 在自由空间和湍流介质中也具有自愈能力。即使当大部分 ALB（大约