Design of a photonic crystal fiber with negative flat dispersion for residual dispersion compensation

The write-up explains numerical design and analysis of a new photonic crystal fiber (PCF). It performs dispersion (D) in the negative flattened region. The providing bandwidth supports bands of E+S+C+L+U into the infrared region (IF) including the window III. The proposed PCF is analyzed for their properties by finite element method (FEM). A perfectly matched layer (PML) boundary is used in FEM. The application of polarization maintaining and residual dispersion compensation (RDC) can be easily performed by the proposed design as it offers high flattened negative average dispersion of -(478±8) ps.nm-1.km-1 in the wavelength (λ) limits of 1.4 to 1.7 μm (300-nm). The structural parameters' changes caused by the effects, studied to prove the accuracy of the properties of the proposed design, that take place during the fabrication.