Zhiqing Wu, Qingzhi Li, Handing Xia; Zhaohua Shi, Xiaoyan Zhou, Qinghua Deng; Weidong Wu,
https://www.spiedigitallibrary.org/journals/Optical-Engineering/volume-57/issue-4/046113/Low-loss-polarization-maintaining-terahertz-fiber-based-on-central-air/10.1117/1.OE.57.4.046113.short?SSO=1
We report a type of single-hole core photonic
crystal fiber for low-loss polarization-maintaining terahertz (THz) wave
guidance. Simulation results show that high birefringence at a level of 10 − 2 can be obtained by a design of minor position adjustment of
the central air hole. Low effective material loss can be achieved because of
the introduced central air hole. The strategy of the central air hole movements
is also applicable for the three-hole core THz photonic crystal fibers. Other
transmission characteristics including single-mode condition, power fraction,
confinement loss, and dispersion were discussed in detail. It is quite clear
that the proposal facilitates the fabrication process due to the simple
structure.
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