Sub-100 attoseconds optics-to-microwave synchronization

Details Sub-100 attoseconds optics-to-microwave synchronization Sub-100 attoseconds optics-to-microwave synchronization

2010-03-14

arxiv.org/abs/1003.2799v1

Appl. Phys. Lett. 96, 211105 (2010)

Physics

Optics

4 pages, 3 figures

Scientific paper

10.1063/1.3431299

We use two fiber-based femtosecond frequency combs and a low-noise carrier suppression phase detection system to characterize the optical to microwave synchronization achievable with such frequency divider systems. By applying specific noise reduction strategies, a residual phase noise as low as -120 dBc/Hz at 1 Hz offset frequency from a 11.55 GHz carrier is measured. The fractional frequency instability from a single optical-to-frequency divider is 1.1E-16 at 1 s averaging down to below 2E-19 after only 1000 s. The corresponding rms time deviation is lower than 100 attoseconds up to 1000 s averaging duration.

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