Abstract
Silver-coated elliptical hollow polycarbonate fibers for transmission of linearly polarized terahertz (THz) radiation are fabricated and characterized. A polarization ratio of 90% and a transmission loss of 0.79 dB/m at 0.65 THz are obtained for a 290-mm long fiber with major and minor inner radii of 2.42 and 1.18 mm. Modal birefringence in the order of 10-3-10-2 is predicted in the frequency region of 0.3-1.5 THz. We also investigate the transmission characteristics of deformed fibers and found that the fiber with a semicircle cross section could rotate the direction of a linear polarization.
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