LNE-SYRTE, Observatoire de Paris, CNRS, UPMC, 61 Avenue de l'Observatoire, Paris, France.
Opt Lett. 2009 Dec 1;34(23):3707-9. doi: 10.1364/OL.34.003707.
In this Letter we report on an all-optical-fiber approach to the generation of ultra-low-noise microwave signals. We make use of two erbium fiber mode-locked lasers phase locked to a common ultrastable laser source to generate an 11.55 GHz signal with an unprecedented relative phase noise of -111 dBc/Hz at 1 Hz from the carrier. The residual frequency instability of the microwave signals derived from the two optical frequency combs is below 2.3x10(-16) at 1 s and about 4x10(-19) at 6.5x10(4) s (in 5 Hz bandwidth, three days of continuous operation).
在这封信件中，我们报告了一种全光纤方法，用于产生超低噪声微波信号。我们利用两个锁模掺铒光纤激光器锁定到一个共同的超稳定激光源，从载波产生一个具有前所未有的相对相位噪声为-111 dBc/Hz 的 11.55 GHz 信号。从两个光频梳衍生出的微波信号的残余频率不稳定度在 1 s 时低于 2.3x10(-16)，在 6.5x10(4) s（5 Hz 带宽，连续运行三天）时约为 4x10(-19)。
