20 February 2018 Orbital angular momentum mode of Gaussian beam induced by atmospheric turbulence
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Abstract
Superposition theory of the spiral harmonics is employed to numerical study the transmission property of the orbital angular momentum (OAM) mode of Gaussian beam induced by atmospheric turbulence. Results show that Gauss beam does not carry OAM at the source, but various OAM modes appear after affected by atmospheric turbulence. With the increase of atmospheric turbulence strength, the smaller order OAM modes appear firstly, followed by larger order OAM modes. The beam spreading of Gauss beams in the atmosphere enhance with the increasing topological charge of the OAM modes caused by atmospheric turbulence. The mode probability density of the OAM generated by atmospheric turbulence decreases, and peak position gradually deviate from the Gauss beam spot center with the increase of the topological charge. Our results may be useful for improving the performance of long distance laser digital spiral imaging system.
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Mingjian Cheng, Mingjian Cheng, Lixin Guo, Lixin Guo, Jiangting Li, Jiangting Li, Xu Yan, Xu Yan, Kangjun Dong, Kangjun Dong, } "Orbital angular momentum mode of Gaussian beam induced by atmospheric turbulence", Proc. SPIE 10697, Fourth Seminar on Novel Optoelectronic Detection Technology and Application, 106972Z (20 February 2018); doi: 10.1117/12.2309755; https://doi.org/10.1117/12.2309755
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