短語詞組短語gaussian beam light propagation 高斯光束beam nonlinear propagation 非線性傳輸Beam -Propagation-Method 光束傳播法;束傳播法;用光束傳播法;光束傳輸法Finite -difference beam-propagation method 有限差分光束傳輸法Ultrashort pulsed beam propagation 超短光脈沖傳輸gaussian beam propagation 高斯光束傳輸vectorial beam propagation method 矢量光束傳輸法a beam propagation 光束傳播 返回 beam propagation