Open AccessTerahertz dual air core fiber directional coupler
Author(s) -
Zi-Wei Jiang,
Bai Jin-Jun,
Hou Yu,
Xianghui Wang,
Shengjiang Chang
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.028702
Subject(s) - power dividers and directional couplers , hybrid coupler , optics , splitter , broadband , terahertz radiation , narrowband , materials science , core (optical fiber) , polarization (electrochemistry) , coupling coefficient of resonators , coupling (piping) , coupled mode theory , resonator , optoelectronics , physics , refractive index , chemistry , metallurgy
A novel low-loss dual-core fiber directional coupler for terahertz raditional is proposed, Coupling properties, loss and group velocity dispersion of the fibers are investigated by the full-vector finite-element method (FEM). The simulation results demonstrate that the coupling length of this coupler is less than 1.8 cm between 1.55 and 1.80 THz, and the coupling broadband of 0.07THz can be realized. And the loss coefficient of the coupler is less than 0.02 cm-1. The directional coupler has potential applications in narrowband filtering, wavelength-division multiplexing, switching, polarization splitter and so on.