Step-index fiber single-mode transmission conditions
Single mode step-index fibers propagate only one mode, called the fundamental mode. In order to accurately study optical modes, the complete Maxwell equations are to be solved. In this paper we employed the FEM software, COMSOL Multiphysics® (version 4. Abstract: After detailed reviews of the exact mode field distribution of Single Mode Step-Index (SMSI) fibers and relevant definitions of Mode Field Diameter (MFD) and a careful comparison between them, a new approximate equation to calculate the mode field diameter is presented in this study. Due to this the transmitted ray does not experience distortion due to delay differences.
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