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Coupling coefficient between waveguide (directional coupler example)
Posted 25 nov. 2023, 00:00 UTC−5 Electromagnetics, Wave Optics 2 Replies
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I am trying to calculate coupling coeffcient between the waveguide for the example (directinal coupler.mph ) given in comsol application libarary. Can anyone help me how can i calculate coupling coefficient as shown in the following paper [](http://www.mdpi.com/2304-6732/9/2/63 -- Thank you -- Govind
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Is this the model to which you are referring? It is in the Application Gallery (not to be confused with the Application Library). https://www.comsol.com/model/directional-coupler-14593 . You can find an accompanying .pdf file that helps explain that model at: https://www.comsol.com/model/download/1259021/models.woptics.directional_coupler.pdf .
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Hi..Robert Koslover, I am sorry for late reply. Actually, I was trying to calculate the cross-talk between two core in above example [https://www.comsol.com/model/directional-coupler-14593]. I can calcuate it by using couple mode theory by calucting E field for one (or another) core taking other core absent and calculating the overlapp integral. But I could not do it by using supermode thery as discussed in the following paper. [(http://opg.optica.org/ol/fulltext.cfm?uri=ol-41-16-3759&id=348251)]. In above example, it was shown that how the electric field couples from one waveguide to other, but it was not ediscussed how can be extract the coupling coeffcient/cross -talk between the two core.