In order to design optical system to collimate laser beam, its far-field distribution should be acquired exactly.

• 为了合理地设计光学系统以整形激光二极管出射光束, 必须准确了解激光二极管的远场分布,然而对于大功率激光二极管仍没有形式简单并且较好反映实际器件特性的光束模型。