Enhanced Optical Performance of Silicon Carbide Infiltrated Rectangular Slotted Photonic Crystal Fiber for Nonlinear and Polarization-Sensitive Applications
摘要
This study presents a modified circular photonic crystal fiber (SiC-PCF) featuring a rectangular slotted core infiltrated with silicon carbide (SiC) designed to enhance optical characteristics for advanced photonic applications. The optical performance of the proposed SiC-PCF was evaluated using the finite element method (FEM) in COMSOL Multiphysics, focusing on key parameters including birefringence, nonlinear coefficient, chromatic dispersion, effective mode area, and confinement loss at an operating wavelength of 1550 nm. Results demonstrate a high birefringence of 0.903 with a corresponding beat length of 1.717 µm. Nonlinear coefficients of 3.117 × 104 W⁻1 km⁻1 and 1.039 × 104 W⁻1 km⁻1 were achieved for x-polarization and y-polarization respectively, alongside effective areas of 0.3967 µm2 and 1.19 µm2. Chromatic dispersion coefficients were measured at − 816.1 ps/(nm·km) for x-polarization and − 8237 ps/(nm·km) for y-polarization, with minimal confinement losses of 4.704 × 10⁻5 dB/cm and 8.667 × 10⁻6 dB/cm respectively. These findings demonstrate the potential of the proposed SiC-PCF for applications in nonlinear optics, telecommunications, and high-precision sensing technologies.