Abstract

The paper report on the latest development of a high performance Metallic QPIC Coupler (MQC) which offers, low-loss, fibre-optic connections for quantum photonic integrated circuits (QPICs). The MQC is constructed from metallic optical benches that hold arrays of single-mode optical fibres, and they couple light to/from QPICs via reflective, freeform mirrors. They are compatible with multiple PIC platforms, including silicon-on-insulator and silicon nitride. Low losses are obtained with the customised mirror design that increases the efficiency of the coupling between the optical fibre and the vertical gratings on the QPIC.

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