Advanced noise reduction techniques for ultra-low phase noise optical-to-microwave division with femtosecond fiber combs

  title={Advanced noise reduction techniques for ultra-low phase noise optical-to-microwave division with femtosecond fiber combs},
  author={Wei Zhang and Zhenyu Xu and Michel Lours and Rodolphe Boudot and Yann Kersal{\'e} and Andre Nicholas Luiten and Y. Le Coq and Giorgio Santarelli},
  journal={IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control},
We report what we believe to be the lowest phase noise optical-to-microwave frequency division using fiber-based femtosecond optical frequency combs: a residual phase noise of -120 dBc/Hz at 1 Hz offset from an 11.55 GHz carrier frequency. Furthermore, we report a detailed investigation into the fundamental noise sources which affect the division process itself. Two frequency combs with quasi-identical configurations are referenced to a common ultrastable cavity laser source. To identify each… 

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