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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 14 — May. 10, 2013
  • pp: 3305–3310

Terahertz polarization splitter based on orthogonal microstructure dual-core photonic crystal fiber

Shanshan Li, Hao Zhang, Yu Hou, Jinjun Bai, Weiwei Liu, and Shengjiang Chang  »View Author Affiliations

Applied Optics, Vol. 52, Issue 14, pp. 3305-3310 (2013)

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A broadband polarization splitter operating in the terahertz (THz) band is proposed based on dual-core photonic crystal fiber with orthogonal microstructure in the core regions. The Index Converse Matching Coupling method is presented to design the THz polarization splitter for the first time, which exhibits several advantages, such as short splitting length, high extinction ratio, low loss, and broad operation bandwidth. By numerical simulation, it has been found that the strong coupling occurs within a frequency range of 0.4–0.7 THz. The operation bandwidth is more than 0.15 THz (equal to 138 μm). The shortest splitting length is only 1.83 cm at 0.4 THz. The extinction ratios for both of x and y polarization are better than 15dB when the frequency is larger than 0.51 THz. The lowest material absorption loss is only 0.34 dB at 0.4 THz. Moreover, this structure is simple to design and easy to fabricate over its counterparts in the communication band. Our research offers an effective method to design a broadband THz device and would be of significance for future relevant applications.

© 2013 Optical Society of America

OCIS Codes
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2340) Fiber optics and optical communications : Fiber optics components
(230.0230) Optical devices : Optical devices
(230.1360) Optical devices : Beam splitters
(060.4005) Fiber optics and optical communications : Microstructured fibers

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: January 30, 2013
Revised Manuscript: March 29, 2013
Manuscript Accepted: April 5, 2013
Published: May 7, 2013

Shanshan Li, Hao Zhang, Yu Hou, Jinjun Bai, Weiwei Liu, and Shengjiang Chang, "Terahertz polarization splitter based on orthogonal microstructure dual-core photonic crystal fiber," Appl. Opt. 52, 3305-3310 (2013)

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