Bartels A, Diddams S A, Oates C W, Wilpers G, Bergquist J C, Oskay W H, Hollberg L
Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA.
Opt Lett. 2005 Mar 15;30(6):667-9. doi: 10.1364/ol.30.000667.
We use femtosecond laser frequency combs to convert optical frequency references to the microwave domain, where we demonstrate the synthesis of 10-GHz signals having a fractional frequency instability of < or =3.5 x 10(-15) at a 1-s averaging time, limited by the optical reference. The residual instability and phase noise of the femtosecond-laser-based frequency synthesizers are 6.5 x 10(-16) at 1 s and -98 dBc/Hz at a 1-Hz offset from the 10-GHz carrier, respectively. The timing jitter of the microwave signals is 3.3 fs.
我们使用飞秒激光频率梳将光学频率基准转换到微波域，在此我们展示了在1秒平均时间内合成分数频率不稳定度≤3.5×10⁻¹⁵的10吉赫兹信号，该不稳定度受光学基准限制。基于飞秒激光的频率合成器的残余不稳定度和相位噪声在1秒时分别为6.5×10⁻¹⁶，在相对于10吉赫兹载波1赫兹偏移处为-98分贝/赫兹。微波信号的定时抖动为3.3飞秒。
