Open AccessUltra‐high birefringent and dispersion‐flattened low loss single‐mode terahertz wave guiding
Author(s) -
Rana Sohel,
Ali Sharafat,
Ahmed Nasim,
Islam Raonaqul,
Aljunid Syed Alwee
Publication year - 2016
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2015.0629
Subject(s) - terahertz radiation , birefringence , dispersion (optics) , mode (computer interface) , optics , materials science , single mode optical fiber , optoelectronics , physics , computer science , optical fiber , operating system
This study proposes a dielectric terahertz (THz) porous core fibre with ultra‐high birefringence and near zero dispersion‐flattened properties. The finite element method is used to design and analyse properties of the proposed THz fibre. The proposed porous core crystal fibre has a triangular lattice with microstructured circular air holes in the outer cladding and elliptical air holes in the core. The design exhibits a high birefringence of 7 × 10 −2 and a low effective material loss of 0.1 cm −1 at the operating frequency of f = 1 THz. It also shows nearly zero flattened dispersion with an absolute dispersion variation of ±0.05 ps/THz/cm in the frequency range of 1.3 to 2.2 THz. Power fraction and confinement loss are also reported in this study. The proposed THz porous fibre is deemed suitable for polarisation‐maintaining THz wave guidance.