光通信研究, 2016 (1): 19, 网络出版: 2016-04-01  

新型太赫兹光子晶体光纤的单模传输特性分析

Analysis of Single-Mode Propagation Characteristics of a Novel THz Wave Photonic Crystal Fiber
作者单位
兰州理工大学 理学院, 兰州 730050
摘要
以低损耗材料聚乙烯为基底, 设计了一种新型的太赫兹光子晶体光纤, 并利用全矢量有限元法对其单模截止频率、色散和损耗进行了数值模拟。结果表明, 改变包层空气孔周期、空气孔直径和纤芯空气孔直径, 可以调节太赫兹单模传输的频率范围。当包层空气孔周期为400 μm、包层空气孔直径为100 μm、纤芯空气孔直径为40 μm时, 不仅可以获得0.1~5 THz的宽频带单模传输范围, 而且在0.5~5 THz频率范围内波导色散可以控制在±0.5 ps/(nm·km), 且模式的限制损耗随频率的增大逐渐减小, 同时在2.8 THz处获得最小传输损耗3.86 dB/m。
Abstract
A novel THz wave Photonic Crystal Fiber (THz-PCF) is designed with a low-loss material polyethylene as the substrate. Its single mode cutoff frequency, dispersion and loss are numerically simulated using the full-vector finite element method. The results show that the frequency range of the THz single-mode propagation can be regulated by changing the cladding air hole period, air hole diameter and fiber core air hole diameter. When the cladding air hole period is 400 μm, the claddingair hole diameter is 100 μm and fiber core air hole diameter is 40 μm, the broadband single-mode propagation range can not only be increased to 0.1~5 THz,but also the waveguide dispersion can be controlled at ±0.5 ps/(nm·km) within the frequency range of 0.5~5 THz. Moreover, the modal confinement loss will gradually decrease with the increase of the frequency and the minimum propagation loss will be 3.86 dB/m at 2.8 THz.

刘延君, 胡守重, 侯尚林, 王道斌, 雷景丽, 武刚, 李晓晓, 袁鹏. 新型太赫兹光子晶体光纤的单模传输特性分析[J]. 光通信研究, 2016, 42(1): 19. LIU Yan-jun, HU Shou-zhong, HOU Shang-lin, WANG Dao-bin, LEI Jing-li, WU Gang, LI Xiao-xiao, YUAN Peng. Analysis of Single-Mode Propagation Characteristics of a Novel THz Wave Photonic Crystal Fiber[J]. Study On Optical Communications, 2016, 42(1): 19.

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