Compensation for the orbital angular momentum of a vortex beam in turbulent atmosphere by adaptive optics

Compensation for the orbital angular momentum of a vortex beam in turbulent atmosphere by adaptive optics
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自适应光学补偿湍流大气中涡旋光束的轨道角动量

DOI:
10.1016/j.optlastec.2017.07.028
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发表时间:
2018
影响因子:
5
通讯作者:
Qiao Chunhong
Qiao Chunhong
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Li Nan;Chu Xiuxiang;Zhang Pengfei;Feng Xiaoxing;Fan ChengYu;Qiao Chunhong

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提出了一种同时补偿大气湍流中光束的轨道角动量和波前畸变的方法。为了验证该方法的有效性,对涡旋光束在湍流大气中上行传输的实验装置进行了模拟。仿真结果表明,利用星上的合作信标,自适应光学系统可以补偿湍流引起的轨道角动量畸变和光束波前畸变。然而,当波前传感器(WFS)的小透镜和变形镜(DM)的致动器的数目小时,不能获得令人满意的结果。
A method which can be used to compensate for a distorted orbital angular momentum and wavefront of a beam in atmospheric turbulence, simultaneously, has been proposed. To confirm the validity of the method, an experimental setup for up-link propagation of a vortex beam in a turbulent atmosphere has been simulated. Simulation results show that both of the distorted orbital angular momentum and the distorted wavefront of a beam due to turbulence can be compensated by an adaptive optics system with the help of a cooperative beacon at satellite. However, when the number of the lenslet of wavefront sensor (WFS) and the actuators of the deform mirror (DM) is small, satisfactory results cannot be obtained.
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