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Optical Engineering

Lorentzian approximation of the fundamental mode in single mode linear and nonlinear fiber
Author(s): Pratap K. Bandyopadhyay; Somenath N. Sarkar
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Paper Abstract

In this paper, we approximate the fundamental mode in single mode step and graded index optical fiber by a single parameter Lorentzian function within scalar variational framework. We show that it works in a low V region, a region important for evanescent wave coupling, more accurately in terms of propagation constant in comparison to single parameter Gaussian for linear and nonlinear fibers. Furthermore, we show that the low V variations of normalized propagation constant b(V), group delay d(V), and waveguide dispersion g(V) with V based on Lorentzian approximation match more accurately with the results for linear optical fiber in comparison to Gaussian approximation in the low V region.

Paper Details

Date Published: 1 March 2011
PDF: 8 pages
Opt. Eng. 50(3) 035004 doi: 10.1117/1.3556715
Published in: Optical Engineering Volume 50, Issue 3
Show Author Affiliations
Pratap K. Bandyopadhyay, Calcutta Institute of Technology (India)
Somenath N. Sarkar, Univ. of Calcutta (India)

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