Pré-Publication, Document De Travail Année : 2014

High-gain weakly nonlinear flux-modulated Josephson parametric amplifier using a SQUID-array

Résumé

We have developed and measured a high-gain quantum-limited microwave parametric amplifier based on a superconducting lumped LC resonator with the inductor L including an array of eight superconducting quantum interference devices (SQUIDs). This amplifier is parametrically pumped by modulating the flux threading the SQUIDs at twice the resonator frequency. Around 5 GHz, a maximum gain of 31 dB, a product amplitude gain bandwidth above 60 MHz, and a 1 dB compression point of -123 dBm at 20 dB gain are obtained in the non-degenerate mode of operation. Phase sensitive amplification-deamplification is also measured in the degenerate mode and yields a maximum gain of 37 dB. The compression point obtained is 18 dB above what would be obtained with a single SQUID of the same inductance, due to the smaller nonlinearity of the SQUID array.

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Dates et versions

hal-01010903 , version 1 (20-06-2014)

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  • HAL Id : hal-01010903 , version 1

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Xin Zhou, Vivien Schmitt, Patrice Bertet, Denis Vion, Waltraut Wustmann, et al.. High-gain weakly nonlinear flux-modulated Josephson parametric amplifier using a SQUID-array. 2014. ⟨hal-01010903⟩
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