Nonlinear characterisation of a silicon integrated Bragg waveguide filter

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 characterisation 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 to investigate 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 characterise 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.

References in corpus (15)

• Quantum walks of correlated particles
• Boson Sampling on a Photonic Chip
• Experimental Boson Sampling
• Experimental boson sampling in arbitrary integrated photonic circuits
• Quantum transport simulations in a programmable nanophotonic processor
• Integrated photonic quantum gates for polarization qubits
• Chip-based photon quantum state sources using nonlinear optics
• Integrated spatial multiplexing of heralded single photon sources
• Qubit entanglement on a silicon photonic chip
• Photon Pair Generation in Silicon Micro-Ring Resonator with Reverse Bias Enhancement
• Telecommunications-band heralded single photons from a silicon nanophotonic chip
• Active Temporal Multiplexing of Indistinguishable Heralded Single Photons
• Truly unentangled photon pairs without spectral filtering
• From Classical Four-Wave Mixing to Parametric Fluorescence in Silicon micro-ring resonators
• Coherence in parametric fluorescence