Sub-100 attoseconds optics-to-microwave synchronization

G. Santarelli; M. Lours; R. Boudot; W. Zhang; Y. Kersale; Y. Le Coq; Z. Xu

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arxiv 1003.2799 v1 pith:3X5UESVW submitted 2010-03-14 physics.optics physics.ins-det

Sub-100 attoseconds optics-to-microwave synchronization

W. Zhang , Z. Xu , M. Lours , R. Boudot , Y. Kersale , G. Santarelli , Y. Le Coq This is my paper

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keywords frequencyattosecondsaveragingcarrierdividernoisephasesynchronization

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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.

Sub-100 attoseconds optics-to-microwave synchronization

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