通过测得夫琅禾费域的场辐射半功率脚宽来推到高斯孔径场的光束半径-By half-power feet wide field radiation measured Fraunhofer domain to push the beam radius Gaussian aperture field

高斯光束的光斑拟合与传播模式分析，通过改变模场半径与束腰位置，拟合高斯光束的传输特性。-Spot characterization and propagation mode analysis of Gaussian laser beam.