标题： 微波信号在低温条件下的原位电光采样及超导应用 显示英文标题

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

摘要： 我们展示了一种低温电光采样（EOS）设置，该设置允许在低温芯片级设备上的任意位置测量微波信号。 我们使用约瑟夫森任意波形合成器（JAWS）生成量子精确的电压信号，并通过EOS设置进行测量，从而校准其响应，使微波测量可追溯到量子标准。 我们使用EOS设置确定超快低温光电二极管的时域响应以及超导传输线中的电气反射系数，即S11散射参数。 最后，我们引入了一种光学飞秒脉冲源，可用于研究超导传输线和终端的保真度，以及嵌入其中的元件如约瑟夫森结阵列的反射情况。 显示英文摘要

摘要： 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.