Abstract

A suspended core microstructured fiber with extremely high birefringence has been proposed for terahertz (THz) wave propagation. An elliptical-shaped core has been formed with slotted rectangular airholes to disrupt the vertical symmetry of the refractive index of the designed fiber. Different design parameters such as the core diameter, ellipticity, porosity, and suspended strut width have been checked to achieve optimum performance from the fiber. The resultant birefringence of the proposed fiber is unprecedented, of the order of ${10}^{-1}$ ($1.057\times {10}^{-1}$ to be precise) with a low effective material loss of $0.047{\mathrm{cm}}^{-1}$ and confinement loss of $9.4\times {10}^{-3}{\mathrm{cm}}^{-1}$ at 1 THz. The dispersion of the designed fiber is below 1 ps/THz/cm extended over a band of 500 GHz (1–1.5 THz) with almost flat profile. It is expected that this fiber could be useful in interferometry, filtering, and sensing applications in the THz range where polarized lights are favorably essential.

© 2018 Optical Society of America

Ultra-high birefringent low loss suspended elliptical core photonic crystal fiber for terahertz applications

Md. Anwar Sadath, Mohammad Saiful Islam, Md. Sanwar Hossain, and Mohammad Faisal
Appl. Opt. 59(30) 9385-9392 (2020)

Squeezed lattice elliptical-hole terahertz fiber with high birefringence

Haibin Chen, Daru Chen, and Zhi Hong
Appl. Opt. 48(20) 3943-3947 (2009)

Ultrahigh birefringence, ultralow material loss porous core single-mode fiber for terahertz wave guidance

Kawsar Ahmed, Sawrab Chowdhury, Bikash Kumar Paul, Md. Shadidul Islam, Shuvo Sen, Md. Ibadul Islam, and Sayed Asaduzzaman
Appl. Opt. 56(12) 3477-3483 (2017)

Silicon nitride based photonic crystal fiber with highly improved birefringence for low loss terahertz propagation

Hanie Kaveh, Fazel Jahangiri, and Tahereh Amini
Opt. Continuum 1(2) 388-398 (2022)

Zeonex-based asymmetrical terahertz photonic crystal fiber for multichannel communication and polarization maintaining applications

Md. Saiful Islam, Jakeya Sultana, Alex Dinovitser, Mohammad Faisal, Mohammad Rakibul Islam, Brian W.-H. Ng, and Derek Abbott
Appl. Opt. 57(4) 666-672 (2018)