Journal
OPTICS COMMUNICATIONS
Volume 343, Issue -, Pages 150-156Publisher
ELSEVIER
DOI: 10.1016/j.optcom.2015.01.020
Keywords
Fiber optics systems; Theory and design; Terahertz
Categories
Funding
- National Basic Research Program of China [2014CB339802, 2011CB808100]
- National Natural Science Foundation of China [11174155, 11174156]
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics (SIOM)
- CETC Research Institute [46]
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A multi-perspective numerical analysis of propagation loss in inhibited coupling fibers (ICFs) in terahertz (THz) band is presented. It is shown that the core boundary strut shape is a critical factor affecting the confinement loss. The simulation results demonstrate that the closer to a circular arc the struts, the lower the confinement loss. Furthermore, the strut thickness and the material refractive index determine the frequencies and the bandwidths of the low loss region. With the decrease of the strut thickness and material refractive index, the low loss region will be shifted toward the higher frequency, and the widths of low loss regions will be broadened. Besides, when material absorption is considered in simulation, the ICFs averaged propagation loss is still about three orders of magnitude lower than the material absorption loss itself. The conclusions could give valuable guidance for the design and fabrication of THz ICFs. (C) 2015 Elsevier B.V. All rights reserved.
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