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Integrated photonics is increasing in importance for compact, robust, andscalable enabling quantum technologies. This is particularly interesting fordeveloping quantum communication networks, where resources need to be deployedin the field. We exploit photonic chip-based $ \rm Si_3 N_4$ ringmicroresonators for the generation of photon pairs with low-loss, high-noisesuppression and coincidence rates of $80\times 10^3\,$s$^{-1}$. A simplephotonic noise characterisation technique is presented that distinguisheslinear and nonlinear contributions that is useful for system design andoptimisation. We then demonstrate an all-fibre $750\,$MHz clock-rate sequentialTime-Bin entanglement scheme with raw interference visibilities $>\,98\,\%$.

High-Rate Photon Pairs and Sequential Time-Bin Entanglement with Si$_3$N$_4$ Ring Microresonators