Abstract

Bragg waveguides are promising optical filters for pump suppression in spontaneous four-wave mixing (FWM) photon sources. In this work, we investigate the generation of unwanted photon pairs in the filter itself. We do this by taking advantage of the relation between spontaneous and classical FWM, which allows for the precise characterization of the nonlinear response of the device. The pair generation rate estimated from the classical measurement is compared with the theoretical value calculated by means of a full quantum model of the filter, which also allows investigation of the spectral properties of the generated pairs. We find a good agreement between theory and experiment, confirming that stimulated FWM is a valuable approach to characterize the nonlinear response of an integrated filter, and that the pairs generated in a Bragg waveguide are not a serious issue for the operation of a fully integrated nonclassical source.

© 2018 Optical Society of America

Subwavelength engineering and asymmetry: two efficient tools for sub-nanometer-bandwidth silicon Bragg filters

Dorian Oser, Diego Pérez-Galacho, Carlos Alonso-Ramos, Xavier Le Roux, Sébastien Tanzilli, Laurent Vivien, Laurent Labonté, and Éric Cassan
Opt. Lett. 43(14) 3208-3211 (2018)

Engineering spectrally unentangled photon pairs from nonlinear microring resonators by pump manipulation

J. B. Christensen, J. G. Koefoed, K. Rottwitt, and C. J. McKinstrie
Opt. Lett. 43(4) 859-862 (2018)

Multi-wavelength filtering with a waveguide integrated phase-modulated Bragg grating

Somnath Paul, Toni Saastamoinen, Seppo Honkanen, Matthieu Roussey, and Markku Kuittinen
Opt. Lett. 42(22) 4635-4638 (2017)

Heterodyne interferometry applied to the characterization of nonlinear integrated waveguides

Meryem Ibnoussina, Aurélien Coillet, Jean-Baptiste Dory, Jean-Baptiste Jager, Pierre Colman, Pierre Noé, and Benoit Cluzel
Opt. Lett. 45(18) 5053-5056 (2020)

Integrated silicon nitride time-bin entanglement circuits

Xiang Zhang, Bryn A. Bell, Andri Mahendra, Chunle Xiong, Philip H. W. Leong, and Benjamin J. Eggleton
Opt. Lett. 43(15) 3469-3472 (2018)