We employ externally shunted $\mathrm{Nb}-{\mathrm{AlO}}_x-\mathrm{Nb}$ Josephson junctions for demonstrating a circuit that is suitable for an optically driven Josephson arbitrary waveform synthesizer (JAWS). This technology enables overdamped junctions with characteristic frequencies above 100 GHz and critical currents of the order of $100\mathrm{\mu }\mathrm{A}$, which is promising, e.g., for low-dissipation optical control of quantum circuits such as superconducting quantum bits. Here we utilize a double-pulse technique to experimentally determine the maximum rate at which optical pulse data can be reliably delivered to the superconducting circuit. We demonstrate the feasibility of data transfer up to 60 Gbit/s, which is about a factor of 4 higher than for typical JAWS.

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• Quantum circuits
• Quantum control
• Quantum information with solid state qubits
• Superconducting quantum optics
• Devices for digital logic, storage & processing
• Josephson junctions
• Photodiodes
• Superconducting devices