Noise properties of a Josephson parametric oscillator

Abstract

We perform the noise spectroscopy of a Josephson parametric oscillator (JPO) by implementing a microwave homodyne interferometric measurement scheme. We observe the fluctuations in the self-oscillating output field of the JPO for a long 10 s time interval in a single shot measurement and characterize the phase and amplitude noise. Furthermore, we investigate the effects of the pump strength on the output noise power spectra of the JPO. We found strong fluctuations in the phase with a $1/f^2$ characteristics in the phase noise power spectrum, which is suppressed by increasing the pump strength.

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Cited by in corpus (2)

• Observation and manipulation of quantum interference in a superconducting Kerr parametric oscillator
• Mitigation of noise in Josephson parametric oscillator by injection locking