Reduction of effective material loss in porous core hexagonal lattice fiber

Abstract

Photonic crystal fiber (PCF) with a novel structure is presented in the paper. Hexagonal lattice with porous core is introduced for effective terahertz (THz) transmission. Shape of the core is a hexagon, and rectangular airholes inside the core are organized in such a way that the mode field is well confined within the core having minimum effective material loss (EML). The properties of proposed PCF such as confinement loss, bending loss, EML, dispersion etc. are widely investigated using finite element method (FEM). Result of simulation shows that roughly estimated reduction of bulk material absorption loss is 90.13 %. The proposed design exhibits extremely low EML of 0.01974 cm−1 and confinement loss of 1.16 × 10-3 cm−1, resulting a total loss of 0.0209 cm−1 at 1 THz. Single mode propagation is observed with flattened profile and reasonable dispersion over a wide range of frequencies.