Terahertz polarization splitter based on a dual-elliptical-core polymer fiber

被引：22

作者：

Chen, Hongzhi ^{[1
]}

Yan, Guofeng ^{[1
]}

Forsberg, Erik ^{[1
]}

He, Sailing ^{[1
,2
]}

机构：

[1] Zhejiang Univ, Ctr Opt & Electromagnet Res, State Key Lab Modern Opt Instrumentat, Hangzhou 310058, Zhejiang, Peoples R China

[2] Sch Elect Engn, Dept Electromagnet Engn, S-10044 Stockholm, Sweden

来源：

APPLIED OPTICS | 2016年 / 55卷 / 23期

基金：

中国博士后科学基金;

关键词：

PHOTONIC CRYSTAL FIBERS; OPTICAL-FIBER; DIRECTIONAL COUPLER; BRAGG GRATINGS; THZ FIBER; PROPAGATION;

D O I：

10.1364/AO.55.006236

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A terahertz polarization splitter based on a dual-elliptical-core polymer fiber is proposed and theoretically optimized. Dual-elliptical cores with subwavelength-scale diameters are independently suspended within a fiber, which not only support two orthogonal polarization modes, being single-mode guided with low absorption losses, but also allow them to switch from one core to the other, with different coupling lengths. As a consequence, the two polarizations can be easily separated by choosing a suitable transmission length at a desired operation frequency. The transmission modes, coupling lengths for x- and y-polarizations, as well as the performance of the proposed polarization splitter at a center-frequency of 0.6 THz are investigated and numerically analyzed. A 1.43 cm long splitter with an ultralow loss of 0.4 dB, a high extinction ratio better than -10 dB and a bandwidth of 0.02 THz is achieved. (C) 2016 Optical Society of America

引用

页码：6236 / 6242

页数：7

共 33 条

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