球形光纤端面效应及其应用

Effect of optical fiber with sphere end and its application

本文介绍了球形光纤端面的制作方法，采用射线理论和等效透镜法分析了圆球形端面多模光纤的端面效应，并给出了两个不同端面多模光纤之间耦合的实验结果。结果表明：圆球形端面光纤具有聚光特性，与平端面相比，使用圆球形端面光纤不仅可以提高光器件之间的耦合效率，而且增大了它们之间的耦合距离，利于光路调试；可广泛应用于光源与光纤、光纤与光纤、光纤与探测器之间的耦合。

Preparation technique of optical fiber's sphere end is introduced. Based on light ray theory and equivalent lens method, the effect of multiple mode optical fiber with sphere end is analyzed. Test results about coupling efficiency between two multiple mode fibers which have different end are given. The results show that the optical fiber with sphere end has light gathering action. Compared with plane end ,the coupling efficiency between optical components is improved greatly, and coupling distance is increased. So optical fiber with sphere end can be used widely in coupling between light source and fiber, fiber and fiber, fiber and light detector.