Loss and Saturation in Superconducting Travelling-Wave Parametric Amplifiers

Abstract

We have developed a coupled-mode analysis framework for superconducting travelling-wave parametric amplifiers using the full Telegrapher's equations to incorporate loss-related behaviour. Our model provides an explanation of previous experimental observations regarding loss in amplifiers, advantages of concatenating amplifiers to achieve high gains, and signal gain saturation. This work can be used to guide the design of amplifiers in terms of the choice of material systems, transmission line geometry, operating conditions, and pump strength.

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Cited by in corpus (5)

• Quantum analysis of second-order effects in superconducting travelling-wave parametric amplifiers
• Nonlinear Properties of Supercurrent-Carrying Single and Multi-Layer Thin-Film Superconductors
• Nonlinear characteristics of Ti, Nb, and NbN superconducting resonators for parametric amplifiers
• Nonlinear mechanisms in Al and Ti superconducting travelling-wave parametric amplifiers
• The effect of complex dispersion and characteristic impedance on the gain of superconducting traveling-wave kinetic inductance parametric amplifiers