The principle of shaping Gaussian beam was studied theoretically and the Flattened Lorentzian(FL) function was chosen as the distribution expression of the flattened beam.
理论分析了高斯光束整形原理， 并选择超洛伦兹函数作为平顶光分布函数；
2
Some important concepts relating to the flattened Gaussian beams (FGBs), such as the field distribution and beam width, are analyzed physically.