Flux ramp modulation based hybrid microwave SQUID multiplexer
We present a hybrid microwave superconducting quantum interference device (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 microw...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
19 April 2022
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| In: |
Applied physics letters
Year: 2022, Volume: 120, Issue: 16, Pages: 1-6 |
| ISSN: | 1077-3118 |
| DOI: | 10.1063/5.0087994 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1063/5.0087994 Verlag, kostenfrei, Volltext: https://aip.scitation.org/doi/10.1063/5.0087994 
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| Author Notes: | Constantin Schuster, Mathias Wegner, Christian Enss, and Sebastian Kempf |
| Summary: | We present a hybrid microwave superconducting quantum interference device (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. |
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| Item Description: | Gesehen am 06.07.2022 |
| Physical Description: | Online Resource |
| ISSN: | 1077-3118 |
| DOI: | 10.1063/5.0087994 |