金属修饰的微结构光纤偏振分束器

发布时间：2018-05-31 19:49

  本文选题：微结构光纤 + 金属　； 参考：《红外与激光工程》2017年05期

【摘要】：提出了一种金属修饰的微结构光纤偏振分束器,并且利用全矢量有限元法仿真分析了该偏振分束器的长度与其结构参数的关系,进而得出了该偏振分束器长度随孔间距、占空比变化的一般规律。研究结果表明:当其他结构参数一定时,该偏振分束器长度会随着孔间距的减小而减短;占空比减小,偏振分束器长度也会随之减短。最终综合考虑其性能与金属材料带来的损耗的影响,设计出一种结构简单的微结构光纤偏振分束器。该偏振分束器长度为3.523 mm,在其工作波长1.55μm处消光比高达74.9 d B,消光比高于20 d B的波长范围为1.53~1.57μm之间的40 nm范围,覆盖了整个光通信的C波段范围。并且该偏振分束器有着较好的冗余特性,在偏振分束器长度存在±5%的误差时,仍能保持较好的性能。
[Abstract]:A metal modified fiber polarization splitter is proposed. The relationship between the length of the polarization beam splitter and its structure parameters is simulated by using the full vector finite element method, and the length of the polarization beam splitter with the distance between the holes is obtained. The general law of duty cycle change. The results show that the length of the polarization beam splitter decreases with the decrease of the hole spacing, and the length of the polarization beam splitter decreases with the decrease of duty cycle when other structural parameters are fixed. Finally, considering the influence of the properties and the loss caused by metal materials, a simple micro-structure fiber polarization beam splitter is designed. The polarization splitter is 3.523 mm in length, and the extinction ratio is 74.9 dB at the operating wavelength of 1.55 渭 m, and the extinction ratio is over 20 dB in the range of 40 nm from 1.53 渭 m to 1.57 渭 m, covering the C band range of the whole optical communication. The polarization splitter has good redundancy, and it can still keep good performance when the error of the length of the polarization splitter is 卤5%.
【作者单位】： 北京交通大学电子信息工程学院;
【基金】：国家自然科学基金(61475016)
【分类号】：TN253

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