The study is made on the laser spot radius, several basic parameters and measurement methods. The essential discussion is focused on the divergence angles of Gaussian beams.
研究了激光光斑半径、发散角的几个基本参量以及测量方法，对高斯光束的发散角测量进行重点讨论。
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Next, duplicate the layer just created and move the new layer to the top. This duplicated layer will be blurred again using the Gaussian blur Filter. However, use a higher radius such as 35 this time.
For a given cavity length, the parameters, including the curvature of reflector, waist radius and spot size on reflectors, are calculated according to the Gaussian profile.