Design Considerations on a Dispersion Compensating Coaxial Fiber

Abstract

This work reports the performance of a dispersion compensating coaxial ber as a function of its geometric parameters. Our analysis is carried out by solving the wave equation under the linearly polarized approximation, which leads to transcendental equations that provide the e ective index of refraction. The highest e ciency at a xed wavelength is achieved for a suitably chosen geometry and this choice is an important factor to determine the general shape of the wavelength-dependent dispersion curve.

Design considerations for multicore optical fibers in nonlinear switching and mode-locking applications

“…The radius of the central core is altered from its original value to the cutoff value, where one supermode carries 70% of the input power and defined that value as the maximum acceptable fabrication errors. The core size of the central core is the only geometrical parameter altered in this paper, because it has been shown that the performance of this fiber is more sensitive to the variation of the central core radius compared to that of the ring core [14]. The radius of the central core and the refractive index of both cores in coupler A are r 1 = 2.1 µm and n 1 = 1.465, respectively, whereas the parameters of coupler B are r 1 = 4.1 µm and n 1 = 1.451.…”

Errors of optical fiber chromatic dispersion calculation caused by line approximation of silica glass refraction index as a function of dopant concentration

“…In particular, calculation of spectral refractive index slopes depending on dopant concentration,, and on the contrary, calculation of dopant concentration distribution on the given profile on some wavelength. It is well known that silica glass refractive index spectral characteristics are evaluated by Sellmeier equation with high precision and by this reason Sellmeier equation widely use for optical fiber dispersion slope calculation [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] . For doped silica glass dispersion characteristics evaluation, as a rule, methods, which based on Sellmeier equation coefficients determination for preassigned value of dopant concentration, are applied.…”