Scintillation index and bit error rate of partially coherent twisted Gaussian beams in turbulent atmosphere

被引：0
作者：
Ying Xu
Yonggen Xu
机构：
[1] Xihua University,Department of Physics, School of Science
来源：
Optical and Quantum Electronics | 2023年 / 55卷
关键词：
PCTGB; Turbulent atmosphere; Scintillation index; Bit error rate;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Analytical expressions for scintillation index (SI) and bit error rate (BER) of partially coherent twisted Gaussian beam (PCTGB) propagating through turbulent atmosphere are derived. Numerical simulation results indicate that the PCTGB has an advantage over the partially coherent Gaussian beam (PCGB) for reducing turbulence-induced scintillation in short distance transmission, and the advantage is further enhanced with the increase of twisted factor. However, the situation is reversed when the PCTGB propagates for longer distance. An interesting result is found that the sign of twisted factor has almost no effect on the on-axis SI, but it has a significant effect on off-axis SI of PCTGB, the PCTGB can greatly drop turbulence-induced scintillation when the sign is positive. We also find that twisted factor dominates the effects on BER of PCTGB when twisted factor is small during long distance transmission, but BER is mainly determined by initial coherence width when twisted factor is large enough. Our results are useful for improving the performance of satellite-ground laser communication system and detecting the parameters of atmospheric turbulence.
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