Abstract
Photon pair generation via spontaneous four-wave mixing in silicon waveguides/microring resonators integrated with a high extinction pump rejection filter is very much in demand for futuristic large-scale integrated quantum photonics circuits. Ideally, a distributed Bragg reflector (DBR) can be designed to offer desired pump rejection. However, fabricated DBRs suffer degradation in pump extinction due to roughness-induced unwanted scattering waves in the forward direction around the Bragg wavelength. It is therefore inferred that the roughness-induced forward scattering can be reduced significantly by integrating a DBR structure in one of the sidewalls (instead of two sidewalls) of a multimode rib waveguide (instead of a single mode strip waveguide). Therefore, we studied a single-stage DBR filter with this design which exhibits a significantly higher stop band extinction (∼63 dB), in comparison with that of earlier reported results (<50 dB). To validate the pump rejection efficiency of such fabricated devices in quantum photonic applications, we have carried out on-chip stimulated four-wave mixing experiments and shown that the pump laser within the rejection band could be attenuated to the level of idler power.
© 2022 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Jérôme Michon, Xavier Le Roux, Alexandre Huot de Saint-Albin, Dorian Oser, Sébastien Tanzilli, Laurent Labonté, Eric Cassan, Laurent Vivien, and Carlos Alonso-Ramos
Opt. Lett. 47(2) 341-344 (2022)
Xiaomin Nie, Nina Turk, Yang Li, Zuyang Liu, and Roel Baets
Opt. Lett. 44(9) 2310-2313 (2019)
Diego Pérez-Galacho, Carlos Alonso-Ramos, Florent Mazeas, Xavier Le Roux, Dorian Oser, Weiwei Zhang, Delphine Marris-Morini, Laurent Labonté, Sébastien Tanzilli, Éric Cassan, and Laurent Vivien
Opt. Lett. 42(8) 1468-1471 (2017)