I am working on modeling some fiber for my dissertation and something came up in doing my homework on standard step index smf fiber. Many of the texts I have referenced and done the standard weakly guided solutions for fibers all use the "weakly guided assumption" and the dispersion relationship to search for modes...
What happens if a fiber is strongly guided? I know the modeling breaks down for that type of solution technique...but what happens in reality with a strongly guided fiber? Why are they not desirable in industry..for telecom etc?
I am a mechanical engineer doing stress sensor research...so I didn't have an EM class. Any help would be appreciated..this is just a question that I have, not really related to my research.