A New Approach to Analyze Nonlinear Propagation in Arbitrary RI Fiber and Study of Dynamic Dispersion Shifting and Flattening

In this article, we present a new approach to study the nonlinear wave propagation along fibers having any arbitrary refractive index profile. Our algorithm devised in a finite difference platform, yields the dispersion properties precisely as applied to the representative cases. We show, by varying applied peak power, the zero dispersion wavelength (ZDW) can be shifted towards 1550 nm wavelength window. Furthermore, we establish the design of realising a flattened total dispersion profile around the Zero Dispersion Wavelength (ZDW). We have achieved consistent total dispersion values within the range of ±1.50 ps/km-nm by utilizing various core radii and highest applied powers of 28 mW, 55 mW, and 118 mW. These dispersion values remain constant over bandwidths of 223 nm, 458 nm, and 531 nm, respectively. These are new results in the context of controlling dispersion characteristics dynamically with varying applied power in the nonlinear fiber medium having any symmetric or asymmetric core cross-section.