Design and Analysis of a Low-Loss Suspended Core Terahertz Fiber and Its Application to Polarization Splitter

Author

Yuan-Feng Zhu ; Ming-Yang Chen ; Hua Wang ; Hong-Bing Yao ; Yong-Kang Zhang ; Ji-Chang Yang

Author_Institution

Dept. of Opt. Eng., Jiangsu Univ., Zhenjiang, China

Volume

5

Issue

6

fYear

2013

fDate

Dec. 2013

Firstpage

7101410

Lastpage

7101410

Abstract

We propose the design of a low-loss suspended core terahertz fiber with rectangular-shaped dielectric strips in the fiber cross section. The finite element method is used to analyze the characteristics of the suspended core terahertz fiber. Terahertz wave in a frequency range from 0.74 ~ 0.95 THz is efficiently confined in the suspended core region with a total loss lower than 0.086 dB/cm ( ~ 0.02 cm^-1). Meanwhile, any contact on the surface of this fiber will not disturb the field and induce additional losses. A 3.36-cm-long terahertz polarization splitter derived from this fiber with a transmission loss less than 0.89 dB, is also numerically demonstrated. A bandwidth of 0.032 THz at the center frequency of 1 THz with an extinction ratio better than -20 dB is obtained.

Keywords

extinction coefficients; finite element analysis; microwave photonics; optical beam splitters; optical design techniques; optical fibre losses; terahertz wave devices; extinction ratio; fiber cross section; finite element method; frequency 0.74 THz to 0.95 THz; low-loss suspended core terahertz fiber; numerical analysis; rectangular-shaped dielectric strips; size 3.36 cm; terahertz polarization splitter; terahertz wave; transmission loss; Suspended core; absorption loss; confinement loss; polarization splitter;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2013.2293609

Filename

6678712