Yuan-Feng Zhu, Xin Liu, Chun-Fang Rao; Hua Zhong, Hai-Mei Luo, Yan-Hua Chen, Zhi-Qing Ye, Hua Wang,
https://www.spiedigitallibrary.org/journals/Optical-Engineering/volume-57/issue-8/086112/Low-loss-terahertz-polarization-splitter-based-on-an-asymmetric-dual/10.1117/1.OE.57.8.086112.short?SSO=1
A relatively simple design of a terahertz (THz)
polarization splitter based on an asymmetric dual-suspended-core fiber is
proposed. One core is formed by two intersecting rectangular dielectric strips
with dissimilar thickness, whereas the other is a round solid core suspended by
crossed dielectric strips with the same thickness. The distance between the
cores can be adjusted to ensure a short splitting length and low transmission
loss. A THz polarization splitter with a length of 1.27 cm is realized
with a low transmission loss of 0.53 and 0.67 dB for the x- and y-polarization
modes, respectively. An extinction ratio of about −20 dB and a broad bandwidth
of 0.046 THz are demonstrated.
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