论文标题
约瑟夫森参数振荡器的噪声特性
Noise properties of a Josephson parametric oscillator
论文作者
论文摘要
我们通过实现微波同源干涉测量方案来执行约瑟夫森参数振荡器（JPO）的噪声光谱。我们观察JPO的自振荡输出场中的波动，在单个射击测量中长10 s间隔，并表征相位和振幅噪声。此外，我们研究了泵强度对JPO输出噪声功率谱的影响。我们在阶段发现了强烈的波动，在相位噪声功率谱中具有$ 1/f^2 $的特性，这通过增加泵强度而抑制。
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.
