C. Clivati, R. Aiello, G. Bianco, C. Bortolotti, V. Di Sarno, P. Maddaloni, F. Levi, G. Maccaferri, A. Mura, M. Negusini, F. Perini, M. Roma, R. Ricci, Luigi Santamaria Amato, M. S. de Cumis, M. Stagni, D. Calonico
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A Coherent Optical Fiber Link for Very Long Baseline Interferometry
We realize a phase-stabilised optical fiber backbone that connects the Italian National Metrology Institute with two radio telescopes over a 600 km baseline. This allows referencing of Very Long Baseline Interferometry (VLBI) facilities with the best atomic frequency standards available today and the implementation of a common-clock architecture, which we are now using to assess VLBI ultimate performances.
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