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
Supported by the National Nature Science Fund of China （61875165）， Innovation Capability Support Program of Shaanxi Program （No：2021TD-09）， the International Science and Technology Cooperation & Exchange Project of Shaanxi （2020KWZ-017）， and Shaanxi Provincial Department of Education Collaborative Innovation Project （20JY060）， Xi’an University of Posts and Telecommunications Joint Postgraduate Cultivation Workstation （YJGJ201905）， and the Graduate innovation fund of Xi’an University of Posts and Telecommunications （CXJJZ2019025）
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 0.1 dB/m， birefringence is more than 2.12×10-5 within the range of 0.8-1.35 THz， dispersion in ±0.027 ps/THz/cm. At 1.12 THz， the minimum total transmission loss is only 0.543×10-2 dB/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 19 cm， the bending loss is less than 0.1 dB/m， and the bending performance is good.
HUI Zhan-Qiang, YANG Xue, HAN Dong-Dong, LI Tian-Tian, ZHAO Feng, YANG Yi, CHEN Su-Guo. High birefringence hollow-core anti-resonant terahertz photonic crystal fiber with ultra-low loss[J]. Journal of Infrared and Millimeter Waves,2022,41(3):563~572Copy