相干长度越小、光束阶数越大，部分相干平顶光束序列的斯特列尔比受湍流影响越小。
The strehl ratio of PCFT beam array with small coherence length and bigger beam order are less affected by turbulence.
光束阶数越大、相干长度越小，部分相干平顶光束序列的相对束腰宽度扩散较快；
The influence of atmospheric turbulence on the relative beam width spreading is larger for PCFT beam array with larger beam order and smaller coherence length.
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