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Experimental research on phase diversity method for correcting vortex beam distortion wavefront
Applied Physics B ( IF 2.1 ) Pub Date : 2020-03-18 , DOI: 10.1007/s00340-020-7413-7
XiZheng Ke , NaMei Cui

The orbital angular momentum (OAM) of the vortex beam has infinite dimension and are orthogonal to each other. OAM multiplexing technology is one of the key technologies to improve the channel capacity of wireless optical communication system. When the vortex beams propagate in atmospheric turbulence, it will cause wavefront distortion. The phase diversity (PD) method is used to obtain the phase information by inversely extracting the intensity information of the focal plane and the defocus plane, and realize the correction of the vortex beam distortion wavefront. The simulation and experimental results show that the relative powers of the single-mode and multi-mode multiplexed vortex beams can be effectively improved using the PD method to correct the distortion wavefront. The crosstalk between modes is reduced, and the correction effect increases with the decrease of topological charge.

中文翻译:

涡旋光束畸变波前相位分集法的实验研究

涡旋光束的轨道角动量 (OAM) 具有无限维度并且彼此正交。OAM复用技术是提高无线光通信系统信道容量的关键技术之一。涡旋光束在大气湍流中传播时,会引起波前畸变。利用相位分集(PD)方法,通过反提取焦平面和离焦平面的强度信息来获得相位信息,实现涡旋光束畸变波前的校正。仿真和实验结果表明,采用PD方法校正畸变波前可以有效提高单模和多模复用涡旋光束的相对功率。降低了模式之间的串扰,
更新日期:2020-03-18
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