A study of the propagation characteristics of W-type single-modefibers using variational fields of single-clad single-mode fibers

摘要

A number of single and two parameter scalar variational fields approximating the fundamental modeof single-clad fibers are available in the literature. The present work aims at checking if these fields canalso explain the propagation characteristics of W-type or double-clad single mode fibers with similaraccuracies. To assess the accuracies, numerical solution of scalar wave equation is required. A methodfor solving the scalar wave equation numerically has also been proposed. Investigation shows that thesingle parameter fields are not very suitable for the W-type fibers. At least a two parameter variationalfield should be used.