论文标题
基于通量坡道调制的混合微波鱿鱼多路复用器
Flux ramp modulation based hybrid microwave SQUID multiplexer
论文作者
论文摘要
我们提出了一种混合微波鱿鱼多路复用器，该多路复用器结合了两种频划分多路复用技术，以允许仅使用编码谐振器的频率一小部分来多路复用给定数量的低温检测器。与常规的微波鱿鱼多路复用类似，我们的多路复用器依赖于电感耦合非滞后的，未鼠标的RF-squids与超导微波谐振器以及应用磁通斜坡调制以进行输出信号线性化。但是，我们将多个鱿鱼与一个常见的读出谐振器相结合，而不是使用一个谐振器，而是通过改变每个鱿鱼的通量坡道调制频率来编码微波载体侧带中的鱿鱼输入信号。我们使用原型设备证明了方法的适用性，并通过基本信息理论来争论我们的方法特别适合读取大型低温钢仪阵列。
We present a hybrid microwave SQUID multiplexer that combines two frequency-division multiplexing techniques to allow multiplexing a given number of cryogenic detectors with only a fraction of frequency encoding resonators. Similar to conventional microwave SQUID multiplexing, our multiplexer relies on inductively coupling non-hysteretic, unshunted rf-SQUIDs to superconducting microwave resonators as well as applying flux ramp modulation for output signal linearization. However, instead of utilizing one resonator per SQUID, we couple multiple SQUIDs to a common readout resonator and encode the SQUID input signals in sidebands of the microwave carrier by varying the flux ramp modulation frequency for each SQUID. We prove the suitability of our approach using a prototype device and argue by means of fundamental information theory that our approach is particularly suited for reading out large cryogenic bolometer arrays.
