We model backscatter for electric fields propagating through optical micro-ring resonators, as occurring both in-ring and in-coupler. These provide useful tools for modelling transmission and in-ring fields in these optical devices. We then discuss spontaneous four-wave mixing and use the models to obtain heralding efficiencies and rates. We observe a trade-off between these, which becomes more extreme as the rings become more strongly backscattered.
Bibliographical noteFunding Information:
We thank Will McCutcheon, Henkjan Gersen and Joshua Silverstone for useful discussions. This work was supported by the Engineering and Physical Sciences Research Council (Grant Nos. EP/T001011/1, EP/R513386/1, EP/M013472/1 and EP/L024020/1).
© Author(s) 2021.