2024/10/31 by Shekhar Priyadarshi, Priyadarshi, Shekhar, Oliver Kieler +18 · 1 citation
Engineering · Physics and Astronomy · #Advanced Electrical Measurement Techniques #Advanced Frequency and Time Standards #FOS: Physical sciences #Microwave and Dielectric Measurement Techniques #Optics (physics.optics) #Quantum Physics (quant-ph) #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.2411.00162
openalex publication_date 2024/10/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
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.