超低损耗高双折射空芯反谐振太赫兹光子晶体光纤
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1.西安邮电大学 电子工程学院,西安 710121;2.西安理工大学 理学院,西安 710048

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High birefringence hollow-core anti-resonant terahertz photonic crystal fiber with ultra-low loss
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1.School of Electronic Engineering, Xi’an University of Posts and Telecommunications, Xi’an, 710121, China;2.School of Science, Xi’an University of Technology, Xi’an, 710048 China

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    摘要:

    本文提出了一种以环烯烃共聚物(cyclic olefin copolymer, COC)为基底的超低损耗高双折射空芯反谐振太赫兹光子晶体光纤,该光纤的包层由两组(共六个)无节点嵌套管组成。采用时域有限差分法(finite difference time domain method, FDTD)结合完美匹配层(perfectly matched layer, PML)边界条件对其导波特性进行分析,仿真结果表明,在0.8THz-1.35THz范围内,总传输损耗小于0.1dB/m,双折射大于2.12×10-5,色散在±0.027 ps/THz/cm。在1.12THz处,最低总传输损耗仅为0.543×10-2 dB/m,双折射值为2.06×10-4。并分析了该光纤的弯曲性能,表明在y方向,当弯曲半径超过19cm时,弯曲损耗小于0.1dB/m,具有良好的弯曲性能。

    Abstract:

    An ultra-low loss and high birefringence hollow core anti-resonant terahertz photonic crystal fiber based on cyclic olefin copolymer (COC) is proposed. The cladding of the fiber consists of two groups (six in total) nodeless embedded sleeves. The guided wave characteristics are analyzed by using the finite difference time domain method combined with the perfectly matched layer boundary conditions. The simulation results show that the total transmission loss is less than 0.1dB/m, birefringence is more than 2.12×10-5 within the range of 0.8THz - 1.35THz, dispersion in ±0.027 ps/THz/cm. At 1.12THz, the minimum total transmission loss is only 0.543×10-2dB/m, birefringence value 2.06×10-4. The bending performance of the fiber is analyzed. It is shown that in y direction, when the bending radius is more than 19cm, the bending loss is less than 0.1dB/m, and the bending performance is good.

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历史
  • 收稿日期:2021-08-19
  • 最后修改日期:2022-03-07
  • 录用日期:2021-10-19
  • 在线发布日期: 2022-02-28
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