Liehl Andreas, Fehrenbacher David, Sulzer Philipp, Leitenstorfer Alfred, Seletskiy Denis V
Opt Lett. 2017 May 15;42(10):2050-2053. doi: 10.1364/OL.42.002050.
Recent demonstrations of passively phase-locked fiber-based combs motivate broadband characterization of the noise associated with the stabilized carrier-envelope offset frequency. In our study, we analyze the phase noise of a 100 MHz Er:fiber system in a wide range spanning from microhertz to the Nyquist frequency. An interferometric detection method enables analysis of the high-frequency output of an f-to-2f interferometer. The dominant contribution of a broadband white noise floor at high frequencies attests quantum-limited performance. An out-of-loop measurement of the carrier-envelope phase reveals its jitter to be as low as 250 mrad when integrated over 12 orders of magnitude of the radio-frequency spectrum.
近期基于光纤的被动锁相频率梳的演示激发了对与稳定的载波包络偏移频率相关的噪声进行宽带表征的研究。在我们的研究中，我们在从微赫兹到奈奎斯特频率的宽范围内分析了一个100MHz掺铒光纤系统的相位噪声。一种干涉检测方法能够分析f - 2f干涉仪的高频输出。高频处宽带白噪声本底的主要贡献证明了其量子极限性能。载波包络相位的环外测量表明，当在射频频谱的12个数量级上进行积分时，其抖动低至250毫弧度。
