D. Nicolodi, R. Bouchand, M. Lours, Xiaopeng Xie, Y. Le Coq, M. Giunta, M. Lezius, W. Haensel, R. Holzwarth, P. Tremblin, G. Santarelli, S. Datta, A. Joshi, C. Alexandre
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Ultra-low phase noise frequency-comb-based microwave generation and characterization
We report on the generation of ultra-low phase noise microwave signals at 12GHz by photodetecting the pulse train of an Erbium-doped fiber-based optical frequency comb phase locked to a ultra-narrow linewidth ultra-stable laser at With advanced photodetection techniques and homemade phase noise measurement apparatus, our experiment demonstrates generation of a microwave source with absolute phase noise below -170dBc/Hz at 10kHz and above, and below -100dBc/Hz at 1Hz from a 12GHz carrier, which pushes even further the best results reported so far.