垂直双空芯宽带太赫兹偏振分离器

发布时间：2018-03-22 15:21

本文选题：偏振分离器　切入点：折射率匹配　出处：《红外与激光工程》2016年12期 　论文类型：期刊论文

【摘要】：针对太赫兹波的特点,利用折射率匹配耦合原理,设计了一种垂直双空芯结构的偏振分离器件。与传统的分离器件相比,它具有以下优点:(1)双芯折射率匹配度高,使得对应的偏振模式所需要的分离长度很短;(2)采用双空气纤芯结构,降低材料对太赫兹波的吸收损耗;(3)通过设计,令其发生耦合的两个纤芯相互垂直,从而使y偏振模的折射率曲线部分重合,大大扩展了工作带宽的范围,其工作带宽达到了0.17 THz。此外,由于器件结构简单对称,降低了光纤的设计和制备难度,使其在太赫兹网络中具有很高的应用价值。
[Abstract]:According to the characteristics of terahertz wave and the principle of refractive index matching coupling, a kind of polarization separation device with vertical double hollow core structure is designed. Compared with the traditional separation device, it has the following advantages: 1) high matching degree of double core refractive index. The separation length required for the corresponding polarization mode is very short) the dual air core structure is used to reduce the absorption loss of the terahertz wave by the material. The two cores which are coupled are designed to be perpendicular to each other. Thus, the refractive index curve of the y polarization mode is partially overlapped, and the range of the operating bandwidth is greatly expanded, which reaches 0.17 THz. in addition, because of the simple symmetry of the device structure, the design and fabrication difficulties of the optical fiber are reduced. It has high application value in terahertz network.
【作者单位】：唐山师范学院物理系;
【基金】：河北省自然科学基金(E2015105079) 唐山师范学院博士基金(2014A07)
【分类号】：TN253

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