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Abstract:

The goal of the optimization process is simultaneously maximization of the single-mode and the anomalous dispersion range in the vicinity of lambda = 1.55 mu m. Input data in the optimization process are the values of the coefficients appearing in the Sellmeier dispersive formula that determines the value of the refractive index of silica glass as a function of wavelength and the amount and the type of a dopant. Output data in the optimization process are values of the core and the first cladding radii. The optimization process consists in solving the eigenvalue equation of the fibre in order to determine the cut-off frequency of the fundamental and the second mode and to define the shape and the zeros of dispersive characteristic of the fundamental mode. Verification of the optimization process rely on the generation of bright soliton in such an optimized fibre in the vicinity of lambda = 1.55 mu m. For this purpose, nonlinear Schrodinger equation is solved numerically using the split-step Fourier method.

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Optimization of W-type fiber in order to use it in bright soliton transmission