Sankar Gangopadhyay

TL;DR: In this paper, the performance of directional coupler consisting of two identical single-mode graded index fibers in presence as well as in absence of Kerr type nonlinearity is presented, and the concerned evaluation involves little computation.

TL;DR: In this paper, a simple iterative method involving Chebyshev formalism was developed to predict the modal field of single-mode graded index fiber in the presence of Kerr-type nonlinearity.

TL;DR: In this article, a simple power series formulation for fundamental modal field of single-mode-graded index fiber developed by Chebyshev formalism is presented, based on which analytical expressions of the said spot sizes in the absence of nonlinearity can be prescribed.

TL;DR: In this article, a simple iterative method involving Chebyshev formalism is proposed to evaluate the first higher order modal field for dual-mode optical fiber having step and parabolic index profiles.

TL;DR: In this article, a simple series expression for fundamental mode based on Chebyshev technique is employed to analyze the coupling characteristics of identical single-mode dispersion-shifted trapezoidal and dispersion flattened graded W and step W fibers directional couplers.