Munster Case Study – Cri/oFlex® for SNSPD read-out

Cri/oFlex® Case Study

The advent of quantum technologies brings not only many opportunities, but also risks: the promise of exponentially increased computational speeds through quantum computing has the potential to undermine the current state-of-the-art digital encryption methods we use to secure our digital lives. For most of us, digital activity has become inseparable from our daily lives, making online security essential for safety and privacy. As such, engineers and researchers have been looking to innovate in secure communication methods.

Starting in 2019, we have supported a research group in the University of Münster to realize the world’s first large-scale (64) Superconducting Nanowire Single Photon Detector (SNSPD) array, a crucial building block for a full-scale quantum internet. We have written a dedicated case study report on the design engineering and validation of our contribution to the project: the implementation of a high-density, flexible microwave solution using Cri/oFlex® Technology.

We designed and fabricated two multi-channel Cri/oFlex® consisting of 8 channels. To pass through the vacuum barrier at the top, a custom flexible substrate feedthrough was developed that fits on a KF-40 vacuum flange. Finally, properly thermalizing the flexible cable is done by utilizing in-house designed thermal clamps which can be fastened at each cooling stage. The test of multi-channel Cri/oFlex was a definitive success.

Download the full case study below!

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Download Cri/oFlex® 2 Datasheet