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arXiv 2006.09281physics.opticsphysics.ins-det
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基于克尔微谐振器频率梳稳定到低噪声微波基准的300 GHz产生

300 GHz generation based on a Kerr microresonator frequency comb stabilized to a low noise microwave reference

Tomohiro Tetsumoto, Fumiya Ayano, Mark Yeo, Julian Webber, Tadao Nagatsuma, Antoine Rolland

摘要:

在这封信中,我们实验证明低噪声300GHz波产生的基础上克尔微谐振器频率梳孤子制度的工作。通过光电锁相环将10GHz GPS约束的介质谐振振荡器的光谱纯度转换到孤子梳的300GHz重复频率。两个相邻的梳状线拍在一个单向行进的载波光电二极管上,将300GHz的毫米波信号发射到波导中。在10kHz、1MHz傅立叶频率下,300GHz相位噪声功率谱密度分别为-88dBc/Hz、-105dBc/Hz。在300 GHz处的自由运行分数频率不稳定性在1秒平均时间处为$1 \times 10^{-9}$。稳定到GPS信号后,我们报告了1秒时$2 \times 10^{-15}$的环内剩余不稳定性,其平均值在1000秒时下降到<$1 \times 10^{-17}$。这种系统提供了一个有前途的路径,实现紧凑,低功耗的毫米波振荡器,低噪声性能的实验室外的应用。

英文摘要:

In this letter, we experimentally demonstrate low noise 300GHz wave generation based on a Kerr microresonator frequency comb operating in soliton regime. The spectral purity of a 10GHz GPS-disciplined dielectric resonant oscillator is transferred to the 300GHz repetition rate frequency of the soliton comb through an optoelectronic phase-locked loop. Two adjacent comb lines beat on a uni-travelling carrier photodiode emitting the 300GHz millimeter-wave signal into a waveguide. In an out-of-loop measurement we have measured the 300GHz power spectral density of phase noise to be -88dBc/Hz, -105dBc/Hz at 10kHz, 1MHz Fourier frequency, respectively. The free-running fractional frequency instability at 300GHz is $1 \times 10^{-9}$ at 1 second averaging time. Stabilized to a GPS signal, we report an in-loop residual instability of $2 \times 10^{-15}$ at 1 second which averages down to < $1 \times 10^{-17}$ at 1000 seconds. Such system provides a promising path to the realization of compact, low power consumption millimeter-wave oscillators with low noise performance for out-of-the-lab applications.

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