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根据二阶矩法、刀口扫描法、可变光阑法对光束束宽的定义，计算了二阶矩法中所有Ｍ~２≤８的拉盖尔－高斯光束的半径及相应的Ｍ~２因子的值，对所得结果进行了讨论。
According to the definition of the beam width by the second moment method, the knife-edge scanning method and the iris method, the radii of all Laguerre-Gaussian beams with M ~ 2≤8 and the corresponding M ~ 2 The value of the factor, the result is discussed.