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physics.optics2014★ 23 cited
Beyond the fundamental noise limit in coherent optical fiber links
C. E. Calosso, E. Bertacco, D. Calonico +7
It is well known that temperature variations and acoustic noise affect ultrastable frequency dissemination along optical fiber. Active stabilization techniques are in general adopt…
physics.optics2014★ 170 cited
Coherent optical frequency transfer at 5e-19 over a doubled 642 km fiber link
D. Calonico, E. K. Bertacco, C. E. Calosso +10
To significantly improve the frequency references used in radio-astronomy and precision measurements in atomic physics, we provide frequency dissemination through a 642 km coherent…