step fiber的用法和样例：
例句
- With equivalent conductance method, the geometry optics theory of step fiber, the light propagation characteristics of Bragg fiber structures have been researched in this paper.
摘要用薄膜光学的等效导纳方法和阶跃光纤的几何光学理论研究布拉格光纤的传输特性。 - The logical effective radius was selected, and the propagation properties of TIR-PCF were discussed with the classical theory of step-index fiber.
选择了较合理的有效半径，利用经典的阶跃光纤理论来研究光子晶体光纤的传输特性。
