In-situ electro-optic sampling of microwave signals under cryogenic conditions and for superconducting applications

• URL: http://arxiv.org/abs/2411.00162v1
• Date: Thu, 31 Oct 2024 19:10:48 GMT
• Title: In-situ electro-optic sampling of microwave signals under cryogenic conditions and for superconducting applications
• Authors: Shekhar Priyadarshi, Oliver Kieler, Alexander Fernandez Scarioni, Judith Felgner, Abdulrahman Widaa, Johannes Kohlmann, Thomas Fordell, Jaani Nissilä, Antti Kemppinen, Mark Bieler,
• Abstract summary: We demonstrate a cryogenic electro-optic sampling (EOS) setup that allows for the measurement of microwave signals at arbitrary positions. We use a Josephson Arbitrary Waveform Synthesizer (JAWS) to generate quantum-accurate voltage signals and measure them with the EOS setup. We use the EOS setup to determine the time-domain response of ultrafast cryogenic photodiodes and the electrical coefficient reflection, i.e., the S11 scattering parameter, in a superconducting transmission line.
• Score: 31.874825130479174
• License:
• Abstract: We demonstrate a cryogenic electro-optic sampling (EOS) setup that allows for the measurement of microwave signals at arbitrary positions on a cryogenic chip-scale device. We use a Josephson Arbitrary Waveform Synthesizer (JAWS) to generate quantum-accurate voltage signals and measure them with the EOS setup, allowing for the calibration of its response, yielding traceability of the microwave measurements to a quantum standard. We use the EOS setup to determine the time-domain response of ultrafast cryogenic photodiodes and the electrical reflection coefficient, i.e., the S11 scattering parameter, in a superconducting transmission line. Finally, we introduce an optical femtosecond pulse source which can be used to study the fidelity of superconducting transmission lines and terminations, as well as reflections from elements like Josephson junction arrays imbedded in them.

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