Anomalous birefringence and nonlinearity enhancement of As₂S₃ and As₂S₅ filled D-shape fiber for optical communication

Abstract

An elliptical core-based D-shape photonic crystal fiber (PCF) has been proposed with achieving extraordinary optical properties in this paper. We deeply observed and evaluated the performance of the designed D-PCF by doping the materials (As 2 S 3 and As 2 S 5 ) separately into the core region with the variation of the eccentricities (core size). After the whole analysis, this D-PCF prefers the As 2 S 3 core material because it produces a better performance of all the optical features compared to the As 2 S 5 material. The results of the raised PCF shows that the maximum nonlinearity of 9.114×10 4 W −1 km −1 , the extreme-high birefringence of 0.254, the better power fraction of 99.51%, the high numerical aperture of 0.78, the large negative dispersion of −2560.12 ps/(nm-km), and the low beat length of 7.09 μm, etc. The finite element method (FEM) has been applied to simulate the optical characteristics and a perfectly matched layer (PML) is used as a boundary condition. So, the above mentioned remarkable outcomes of the designed D-PCF makes it a robust candidate in many helpful applications like biomedical imaging, telecom, super-continuum generation, and polarization-maintaining signal processing.