Novel shaped solid-core photonic crystal fiber for the numerical study of nonlinear optical properties.

A newly developed pentagonal photonic crystal fiber (P-PCF) with high nonlinearity and birefringence has been introduced in this work. Numerical analysis is carried out across the broader wavelength spectrum from 1.0 to 2.0 μm within the inferred region (IR). Furthermore, using the finite element method (FEM) with smaller mesh, a numerical examination of several optical characteristics such as effective mode area (EMA), nonlinearity, numerical aperture (NA), birefringence, and V-parameter was carried out. By using a circular completely matched layer (PML), the proposed P-PCF's optical transmission qualities have been guided. For the x-polarization mode, the suggested P-PCF exhibits high nonlinearity of 1.6 × 104 W−1 Km−1 at the working wavelength of λ = 1.4 µm. Furthermore, the proposed structure offers strengthening birefringence 2.5 × 10–6 at 1.6 μm wavelength including numerical aperture (NA) of 0.44 for the X-polarization mode. Based on the outstanding advantages, it can be asserted that the suggested model will find a promising domain of application in the area of all optical signal processing, sensing applications, and coherent optical communications. [ABSTRACT FROM AUTHOR]