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Vector coupled-mode theory of dielectric waveguides

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2 Author(s)
Kireev, A.N. ; Inst. of Appl. Phys., Univ. of Bern, Switzerland ; Graf, T.

A consistent derivation of a system of vector coupled-mode (VCM) equations for parallel dielectric waveguides is presented and compared with earlier versions of the improved coupled-mode theory (ICMT). As a validity test, it is shown that the effectively scalar transverse electric and transverse magnetic (TM) coupled-mode (CM) equations are direct limits of our full VCM formulation. In particular, our formulation does not lead to the fundamental error found with earlier coupled-mode theories (CMTs) in a case of TM fields. Functional equations of our VCMT are consistent with Maxwell's equations and lead to higher precision. They can be applied to complicated arrays of strongly coupled parallel dielectric waveguides with true vectorial behavior.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:39 ,  Issue: 7 )