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激光束通过湍流大气后在接收平面上的通量密度相关状况是光分集接收的设计基础。本文讨论了接收天线孔径平滑效应对空间相关性的影响。我们认为孔径平滑效应将增加通量密度的相关距离,但在光斑范围内,仍存在空间不相关的子域,所以分集接收技术仍可用来改善信号质量。实验证实了这一推断,并证实了空间分集接收技术在改善光信号质量方面有很大的潜力。
The relative density of the flux density in the receiving plane after the laser beam passes through the turbulent atmosphere is the design basis for optical diversity reception. This article discusses the effect of the aperture smoothing effect of the receiving antenna on the spatial correlation. We believe that the aperture smoothing effect will increase the relative distance of the flux density, but spatially uncorrelated subfields still exist in the spot range, so diversity reception techniques can still be used to improve the signal quality. The experiment confirms this inference and confirms that space diversity reception has great potential in improving optical signal quality.