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We present the design and investigation of a single-polarization suspended-core fiber with an elliptical core consisting of crossed rectangular-shaped dielectric strips. By optimizing the fiber configuration parameters, single-polarization single-mode transmission with a bandwidth of 400nm can be obtained. Also, the power fraction in air of the x-polarization fundamental mode is relatively high, which...
•A low loss THz polarization splitter based on dual-core optical fiber is designed.•The dual-core fiber is with crossed dielectric strips in the fiber cross section.•Most power of the field distributing in the air holes leads to low loss of the fiber.•The polarization splitting is realized by coupling one and entrapping the other one.•Any environmental contact will not disturb the field and induce...
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