Related Experiment Video
Updated: Aug 17, 2026

Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors
Published on: January 29, 2013
Modal analysis of M-type-dielectric-profile optical fibers in the weakly guiding approximation
Markus Hautakorpi1, Matti Kaivola
1Optics and Molecular Materials, Helsinki University of Technology, PO.Box 3500, FI-02015 HUT, Finland. Markus.Hautakorpi@hut.fi
Abstract:
We study the applicability of the weakly guiding approximation (WGA) to the modal analysis of an M-type optical fiber in which a ring-shaped core lies between two uniform cladding layers. Besides being dependent on the refractive indices, the accuracy of the approximation is shown to be substantially affected by the transverse dimensions of the core. The accuracy is characterized by calculating an overlap integral between the exact and WGA-approximated modal fields. Fibers that have an inner cladding similar to the outer cladding, or similar to vacuum, are considered in detail. The feasibility of the WGA in determining the fiber parameters for single-mode guidance is also discussed.
Related Concept Videos
Susceptibility, Permittivity and Dielectric Constant
Dielectric Polarization in a Capacitor
Debye–Huckel–Onsager Conductance Equation
Gauss's Law in Dielectrics
Electromagnetic Waves in Matter
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the medium, μ.
Furthermore, the...
Electrostatic Boundary Conditions in Dielectrics
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity.
