Use of Constrained Minimisation Method in Study of Optical Fibres

In general, the dispersion characteristics needed to evaluate the performance of optical fibres are obtained numerically, which is time-consuming. This letter reports a method which is computationally fast and gives accurate results. The variational method used with the propagation relation imposed as a constraint enables the use of an iteration method. © 1990, The Institution of Electrical Engineers. All rights reserved.