Measurement of additive timing jitter achieves 2.71 fs RMS at 16 GHz, indicating attosecond resolution capabilities.
The additive timing jitter of an electro-optic frequency comb is measured using a balanced optical microwave phase detector, achieving 2.71 fs RMS at 16 GHz. We show that this detector can reach attosecond resolution.
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Jiang et al. (2025) studied this question.
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