Photonics Research, 10(2), 365, Feb 2022 (IF: 7.254, JCR 11.39%)

 

 

 

 

Precise and stable synchronization between an optical frequency comb and a microwave oscillator is important for various fields. In this work, we demonstrate the shot-noise-limited performance of an electro-optic timing detector-based comb-microwave synchronization, which enabled an unprecedented residual timing noise floor of 53 zs/Hz1/2. We identified that bandpass filtering of the microwave signal and optical pulse repetition-rate multiplication are critical for achieving this performance.