基于领结型多孔光纤的双芯太赫兹偏振分束器

发布时间：2018-05-09 11:17

本文选题：偏振分束器 + 太赫兹　；参考：《物理学报》2017年02期

【摘要】：领结型多孔光纤具有高双折射的特性,本文基于此设计了一种新型的双芯太赫兹(THz)偏振分束器,采用调整结构法实现了折射率反转匹配耦合,达到偏振分离.仿真结果表明:该偏振分束器在0.5—2.5 THz频率范围内均可实现偏振分离,最小分离长度仅为0.428 cm,且在整个频率范围内分离长度不超过2.5 cm.在2.3 THz,x,y两偏振模的吸收损耗均小于0.35 d B;消光比高达22.9和19.2 d B.此外,与填充法实现折射率反转匹配耦合的双芯THz偏振分束器进行比较,本文设计的偏振分束器实现简单,运行的频率范围更宽,分离长度更短,吸收损耗更低.
[Abstract]:The bow type porous fiber has the characteristic of high birefringence. Based on this, a new type of dual-core THz THZ polarization splitter is designed. The refractive index inversion matching coupling is realized by adjusting the structure method, and polarization separation is achieved. The simulation results show that the polarization separation can be realized in the frequency range of 0.5-2.5 THz, the minimum separation length is only 0.428 cm, and the separation length is not more than 2.5 cm in the whole frequency range. The absorption loss of the two polarization modes is less than 0.35 dB and the extinction ratio is as high as 22.9 and 19.2 dB. In addition, compared with the dual-core THz polarizing beam splitter with refraction index inversion matching coupling, the polarization beam splitter designed in this paper has the advantages of simple implementation, wider frequency range, shorter separation length and lower absorption loss.
【作者单位】：南京邮电大学光电工程学院;天津大学光电信息技术科学教育部重点实验室;
【基金】：光电信息技术教育重点实验室(天津大学)开放基金(批准号:2014KFKT003) 国家自然科学基金(批准号:61571237)、国家自然科学基金青年科学基金(批准号:61405096) 区域光纤通信网与新型光通信系统国家重点实验室开放基金资助项目(批准号:2015GZKF03006) 江苏省光通信工程技术研究中心资助项目(批准号:ZSF0201)资助的课题~~
【分类号】：TN253

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