Core-angle controlled dispersion engineering in a sector-truncated photonic crystal fiber for optical communication applications

Abstract By altering their microstructured architecture, photonic crystal fibers provide us with great design versatility. In this work, we present a particular kind of photonic crystal fiber with a unique core form and use simulations to examine its characteristics. This new design is different from circular-core photonic crystal fibers because it has a core region that is cut off at certain angles giving us more control over how light behaves. We looked at five core-angle configurations: 360°, 350°, 340°, 330°, and 320°. We studied how these configurations affect the fiber’s properties over a wavelength range of 1–2 μm. When we reduced the core angle, we found that it changed the refractive index, the amount of power in the core, the effective mode area, the nonlinear coefficient, the confinement loss, and the chromatic dispersion. Our simulation results show that cutting off the core at angles changes how light is distributed and how the fiber works, but it still keeps the light confined. We observed that the effective mode area decreased and the nonlinear response increased for truncated-core configurations. This means that the light is more localized within the guiding region.