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Numerical analysis of optical fibers using matrix approach

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3 Author(s)
M. R. Shenoyu ; Dept. of Phys., Indian Inst. of Technol., New Delhi, India ; K. Thyagarajan ; A. K. Ghatak

The authors conduct a numerical analysis of optical fibers characterized by arbitrarily graded, cylindrically symmetric refractive index profiles by transforming them into equivalent planar profiles and using a matrix approach developed earlier for the analysis of planar optical waveguides (see ibid., vol.5, p.660-7, 1987). The method, which involves only straightforward multiplication of 2×2 matrices, can be used to calculate the propagation constant, modal field profiles, leakage/absorption loss, etc. of fibres with arbitrarily graded profiles. The applicability of the method has been shown through calculations of propagation constant and modal fields of single-clad and coaxial step-index fibers. Calculations of leakage loss of LP01 and LP11 modes in depressed inner clad fibers have also been presented. The method was also used to determine the coupling length in a coaxial optical-fiber coupler, which has potential applications in optical-fiber sensing

Published in:

Journal of Lightwave Technology  (Volume:6 ,  Issue: 8 )