功率密度的二阶矩方法可用于截断光束，并克服了光束质量因子的发散困难。
It is also shown that the second-order moment method of the power density is applicable to the truncated beams and overcomes the divergence difficulty of the beam quality factor.
功率密度的二阶矩方法可用于截断光束，并克服了光束质量因子的发散困难。
It is also shown that the second-order moment method of the power density is applicable to the truncated beams and overcomes the divergence difficulty of the beam quality factor.
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