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[交流] 计算沿着z方向传播的光束的半高全款时是算x方向还是算y方向

RT。
1.光束沿着z方向传播,计算光束的半高全宽,那么计算的时候是计算沿着x方向的光强的半高全宽还是计算y方向的半高全宽?
比如xy截面上的光强分布为[Ex,Ey],那么是找到Ey的最大值Ey_max,然后计算[Ex,Ey_max]的半高全宽,还是计算[Ex_max,Ey]的半高全宽?

2.计算半高全宽的选择沿着x还是沿着y方向的电场,是否和光源偏振有关?光源沿着x偏振、y偏振和圆偏振是否计算方法都一样呢?
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