propagation distance

基本解释

The spatial coherence of the beam is not relevant to its initial coherence for longer propagation distance.
長距離傳輸後，光束空間相乾性與光束初始相乾長度不再有關。
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We numerically show that there are many extremums in dependence of the propagation distance on the period lengths of perturbation.
數值模擬發現，在脈沖傳輸距離與擾動周期長度的關系中存在著一種多極值結搆。
Therefore, the R of laser beams with larger R in free space will become smaller than the R of those with smaller R in free space after a certain propagation distance in turbulence.
因此，儅光束傳輸到一定距離之後，湍流使得原來在自由空間中較大的R變小，而較小的R變大。