De Syamsundar, Thiel Valérian, Roslund Jonathan, Fabre Claude, Treps Nicolas
Opt Lett. 2019 Aug 15;44(16):3992-3995. doi: 10.1364/OL.44.003992.
We study noise propagation dynamics in a femtosecond oscillator by injecting external noise on the pump intensity. We utilize a spectrally resolved homodyne detection technique that enables simultaneous measurement of amplitude and phase quadrature noises of different spectral bands of the oscillator. We perform a modal analysis of the oscillator noise in which each mode corresponds to a particular temporal/spectral shape of the pulsed light. We compare this modal approach with the conventional noise detection methods and find the superiority of our method, in particular unveiling a complete physical picture of noise distribution in the femtosecond oscillator.
我们通过在泵浦强度上注入外部噪声来研究飞秒振荡器中的噪声传播动力学。我们采用一种光谱分辨零差检测技术，该技术能够同时测量振荡器不同光谱波段的幅度和相位正交噪声。我们对振荡器噪声进行模态分析，其中每个模式对应于脉冲光的特定时间/光谱形状。我们将这种模态方法与传统噪声检测方法进行比较，发现我们方法的优越性，特别是揭示了飞秒振荡器中噪声分布的完整物理图像。
