Understanding the saturation power of Josephson parametric amplifiers made from SQUID arrays

Planat, Luca ; Dassonneville, Rémy ; Martínez, Javier Puertas ; Foroughi, Farshad ; Buisson, Olivier ; Hasch-Guichard, Wiebke ; Naud, Cécile ; Vijay, R. ; Murch, Kater ; Roch, Nicolas (2019) Understanding the saturation power of Josephson parametric amplifiers made from SQUID arrays Physical Review Applied, 11 . ISSN 2331-7019

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Official URL: https://doi.org/10.1103/PhysRevApplied.11.034014

Related URL: http://dx.doi.org/10.1103/PhysRevApplied.11.034014

Abstract

We report on the implementation and detailed modeling of a Josephson parametric amplifier (JPA) made from an array of eighty superconducting quantum interference devices (SQUIDs), forming a nonlinear quarter-wave resonator. This device is fabricated using a very simple single-step fabrication process. It shows a large bandwidth (45 MHz), an operating frequency tunable between 5.9 and 6.8 GHz, and a large input saturation power (−117 dBm) when biased to obtain 20 dB of gain. Despite the length of the SQUID array being comparable to the wavelength, we present a model based on an effective nonlinear nonlinear LC series resonator that quantitatively describes these figures of merit without fitting parameters. Our work illustrates the advantage of using array-based JPA since a single-SQUID device showing the same bandwidth and resonant frequency would display a saturation power 15 dB lower.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:139224
Deposited On:21 Aug 2025 09:52
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