It is traditionally treated that when optical wave propagates through a turbulent atmosphere, the optical signal fluctuates "randomly". However, this paper validates that the optical signal fluctuations are not "random" by experiments. 3 optical propagation experiments are performed: ground-to-satellite-to-ground, horizontal propagation, and stellar observation. The experiments results show that: when it is observed in a small-scale period, the optical wave propagating through the atmosphere fluctuates "randomly"; but when it is observed in a large-scale period, the optical scintillation follows the same rules of share price fluctuations. Utilizing the techniques of share transaction to predict the optical scintillation has potential value for free-space optical communication system and laser transmitter system.
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