The effects of atmospheric turbulence on the Orbital Angular Momentum-multiplexed system

被引：1
|
作者：
机构：
[1] College of Telecommunications and Information engineering, Nanjing University of Posts and Telecommunications, Nanjing
[2] College of Electronic Information, Nantong University, Nantong , 226000, Jiangsu
来源：
Zhao, Sheng-Mei | 1600年 / Chinese Optical Society卷 / 43期
关键词：
Atmospheric turbulence; Bit error rate; Multiplexing system; Normalizated-received power; Orbital angular momentum; Refractive index structure constant; Transmission distance;
D O I：
10.3788/gzxb20144309.0901001
中图分类号：
学科分类号：
摘要：
The effects of turbulence aberrations on Orbital Angular Momentum (OAM)-multiplexed system by numerical simulation were analysed, where the turbulence aberration was simulated by several random phase screens generated by Kolmogorov model. The performances of normalized-received power and Bit Error Rate(BER) of the OAM-multiplexed system were characterized through changing the refractive index structure constant Cn2 and transmission distance z. The results show that normalized-received power decreases and the BER performance increases while the constant Cn2 and transmission distance z increases. The normalized-received power decreases to less than 0.2 and BER increases to more than 0.3 when the refractive index structure constant Cn2 is 5×10-13m-2/3. The normalized-received power decreases to less than 0.3 and BER increases to more than 0.35 while transmission distance z reaches 10 000 m. The comparison of the BER performance between two OAM-multiplexed systems with different values of the azimuthal index l is characterized. The results show that the OAM-multiplexed system which has closer values of l is more affected by atmospheric turbulence. At last, the BER with atmospheric tarbulence is decreased by two to three orders of magnitude compared with that one without atmospheric tarbulence at the same OSNR. The researchs have a good reference value for practical application of OAM-multiplexed system.
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