几何芯圆度参数与保偏光纤的性能

PMF＇s core circularity and it＇s performance

本文主要对不同几何芯圆度的熊猫型保偏光纤的性能进行研究。对光纤的几何、光学等性能都进行了全面的测试，在对测试结果的总结和分析中，找到光纤芯圆度对光纤性能的影响。特别针对光纤的纵向均匀性（OTDR）、串音（ER）的稳定性、拍长（BL）性能等关键性能进行了研究。研究表明，光纤的芯圆度在达到一定范围内，均能满足保偏光纤的使用需要，但是当光纤的芯圆度恶化到一定的程度，将会使得保偏光纤的性能有一定程度的降低。从本文的结论中期望得到一个保偏光纤的制造和使用过程中提供保偏光纤性能保障的芯圆度参数的参考指标。

This paper research on the different core circularity parameter influences the PMF＇ s performance. Measure the fiber＇ s geometrical and optical performance, with the analyze of the test results, research the influence from the core circularity. Test the longitudinal uniformity, crosstalk, beatlength of the PMF. The results indicate that the fiber＇ s core circularity would not influence the fiber＇ s performance when it not too bad. But when the core circularity deteriorate to certain degree, the PMF＇ s performance would also deteriorate much. From these results, it would be get a specification of the PMF＇ s core circularity to provide the fiber＇ s good performance.