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The Effect of Repairing the Distorted OAM Beam With Changing the Gaussian Index of Deformable Mirrors
YANG Xuan #,YIN Xiaoli *,GUO Xinlan,SANG Hongqing
School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876
*Correspondence author
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Funding: This work is supported by the National Natural Science Foundation of China （No.No.61575027 and No.61471051)）
Opened online:11 December 2015
Accepted by: none
Citation: YANG Xuan,YIN Xiaoli,GUO Xinlan.The Effect of Repairing the Distorted OAM Beam With Changing the Gaussian Index of Deformable Mirrors[OL]. [11 December 2015] http://en.paper.edu.cn/en_releasepaper/content/4668251
 
 
As we know that deformable-mirror (DM) is used in the adaptive optics (AO) system to compensate the phase distortion of orbital angular momentum (OAM) beams transmitted in atmospheric turbulence. In the AO system, stochastic-parallel-gradient-descent (SPGD) algorithm is used to generate the phase correction pattern for distorted OAM beams. In order to improve spatial compensation capability for phase-front of distorted OAM beams, we focus on the Gaussian index of DM. By changing the value of the Gaussian index of DM, we make some analysis and get the best value of Gaussian index for 32-element DM to compensate the distorted OAM beam. This technique can be applied to AO system to improve the compensation capability.
Keywords:Adaptive optics; Orbital angular momentum;Deformable mirror; Gaussian index;
 
 
 

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