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Homework Help: Boundary conditions at core-cladding interface of fibre waveguide

  1. Apr 10, 2010 #1
    Hi everyone,

    We're currently applying Maxwell's Equations to an optical fibre, and I don't quite understand the boundary conditions at the core-cladding interface.

    I've been told that (where E and H are the electric and magnetic field vectors):
    What does 'no currents' mean? Why is it the H field continuous if there are no currents? Or is it the other way around? I understand a bit about displacement current, and that sort of thing but am having trouble joining the dots.

    And I understand what the other boundary conditions are, but do not understand why they are conditions. Why are the other two so?

    I'd appreciate any insight/pointers to some good reference material.

    Thanks in advance,

    Tom.


    P.S. sorry to not use the template... it didn't seem to fit.
     
    Last edited: Apr 10, 2010
  2. jcsd
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