聚焦法测量塑料光纤折射率分布的可行性研究(英文)

Applicability of the Focusing Method to Measure the Refractive Index Profile of Polymer Optical Fibers

结合理论分析和实验验证,探讨了聚焦法测量塑料光纤纤芯的折射率分布的可行性。结果表明,对GIPOF而言,聚焦法是一种简单可行的技术.但是对SIPOF,由于入射光线在光纤边界处发生交叉,聚焦法不能精确测量其折射率分布.

The possibility of applying the focusing method to measure the refractive index profile of polymer optical fibers is studied through combination of the theoretical analysis and experimental verification. The result shows that the focusing method is an easy and feasible way to determine the refractive index of graded-index POFs; however, as the light rays cross each other near the POF boundary, the focusing method is not an appropriate way to decide accurately the refractive index profile of step-index POFs.