The normalized modefield and power proportion inside the core are also studied under different structure parameters of triangular segmented core with step ring optical fiber by this method 用此方法研究了带阶跃环的三角型分段折射率分布光纤中归一化模场半径与芯层传输功率及总传输功率比值随光纤不同结构参数的变化规律。
