光学学报, 2020, 40 (24): 2401001, 网络出版: 2020-11-23   

聚焦贝塞尔光束在大气湍流中的螺旋相位谱 下载: 923次

Spiral Phase Spectrum of Focused Bessel Beams in Atmospheric Turbulence Channel
作者单位
太原理工大学物理与光电工程学院, 山西 太原 030024
摘要
涡旋光束在大气中传输时的湍流效应导致其轨道角动量发生串扰,传输质量下降。为了有效减小光波在大气传输中的湍流影响,探索减缓湍流效应的措施,利用螺旋谱分析理论,研究了各向异性非Kolmogorov大气湍流及光束参数对聚焦贝塞尔光束的螺旋谱展宽和接收功率的影响。结果表明,光束的波长、拓扑荷数、束腰半径、宽度参数以及湍流的强度、各向异性程度、内外尺度均会对接收功率产生影响。通过多层相位屏模拟法对比研究了聚焦与准直贝塞尔光束的螺旋谱分布情况,分析得出聚焦贝塞尔光束的接收功率更高、串扰功率更低。
Abstract
When the vortex beams propagate in the atmosphere, the turbulence effect causes the crosstalk of its orbital angular momentum, which reduces the transmission quality. In order to effectively reduce the influence of turbulence on the propagation of light waves in the atmosphere and explore the measures to slow down the turbulence effect, the influences of anisotropic non-Kolmogorov atmospheric turbulence and beam parameters on the spiral spectrum broadening and receiving power of focused Bessel beams are studied by using the spiral spectrum analysis theory. The results show that the wavelength, topological charge, waist radius, width parameters, turbulence intensity, anisotropy, and internal and external scales all affect the received power. In addition, the spiral spectrum distribution of focused and collimated Bessel beams is comparably studied by using multi-layer phase screen simulation method. It is concluded that the focused Bessel beam has higher receiving power and lower crosstalk power.

韦宏艳, 闫玠霖, 贾鹏, 蔡冬梅. 聚焦贝塞尔光束在大气湍流中的螺旋相位谱[J]. 光学学报, 2020, 40(24): 2401001. Hongyan Wei, Jielin Yan, Peng Jia, Dongmei Cai. Spiral Phase Spectrum of Focused Bessel Beams in Atmospheric Turbulence Channel[J]. Acta Optica Sinica, 2020, 40(24): 2401001.

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