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The Numerical Calculation on the Effective Area of Photonic Crystal Fiber Using FEM

The effective areas of triangular lattice photonic crystal fiber (PCF) are analyzed using the finite element method (FEM) both for single-rod and three-rod core PCF. While keeping the normalized wavelength constant, the effective areas of PCF increase with increasing wavelength, it also decrease with increasing ratio of hole diameter over the hole pitch. We also compared the effective area of single-rod core and three-rod core PCF. We find that the effective area of three-rod core PCF is larger than that of single-rod core PCF as the normalized wavelength is small.