Nakazawa M, Suzuki K
Opt Lett. 2001 May 1;26(9):635-7. doi: 10.1364/ol.26.000635.
We propose a new cesium (Cs) atomic clock whose microwave source is a 9.1926-GHz harmonically and regeneratively mode-locked erbium fiber laser rather than a quartz oscillator and a multiplexer. The repetition rate of the laser is directly locked to the Cs resonance, and the frequency stability evaluated by the Allan variance is 7.1 x 10(-12) for tau = 1 s. This new atomic clock provides not only a precise 1-s time standard after demultiplexing but also an optical pulse train with the same stability, which means that the ultrastable clock signal can be delivered throughout the world by means of optical fiber networks.
我们提出了一种新型铯（Cs）原子钟，其微波源是一台9.1926吉赫兹的谐波再生锁模铒光纤激光器，而非石英振荡器和复用器。激光器的重复频率直接锁定到铯共振，当积分时间τ = 1秒时，通过阿伦方差评估的频率稳定性为7.1×10⁻¹² 。这种新型原子钟不仅在解复用后提供精确的1秒时间标准，还提供具有相同稳定性的光脉冲序列，这意味着超稳定时钟信号可通过光纤网络传输到世界各地。
