Design and analysis of negative curvature hollow-core fibers for future generation communication

In this paper, we have reported a new design and demonstrated the analytical study of the hollow core negative curvature fibers (HCNCFs). Hollow core negative curvature fibers (HCNCF) is a kind of hollow core leaky mode optical fiber, which is defined by the negative curvature of the core boundary. These typical optical fibers consist of an arrangement of capillaries tightly packed over the hollow core. Due to their unique arrangement it creates a boundary of negative curvature with respect to the core of the fiber. As compared to with photonic bandgap fiber this specially designed hollow core negative curvature fiber shows low loss, wide bandwidth and maximum power confined in the core. Numerical simulations were performed using COMSOL software to study the properties of HCNCFs. In the simulations, it was found and reported that the capillary thickness is the most important factor determining the attenuation of HCNCFs. These features make the negative curvature fiber highly advantageous with tremendous potential applications in optical communication and sensor applications.