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Demonstration of Real-Time Precision Optical Time Synchronization in a True Three-Node Architecture
preprintposted on 2023-12-31, 17:00 authored by Kyle W. Martin, Nader Zaki, Matthew S. Bigelow, Benjamin K. Stuhl, Nolan Matthews, John D. Elgin, Kimberly Frey
Multi-node optical clock networks will enable future studies of fundamental physics and enable applications in quantum and classical communications as well as navigation and geodesy. We implement the first ever multi-node optical clock network with real-time, relative synchronization over free-space communication channels and precision on the order of 10 fs, realized as a three-node system in a hub-and-spoke topology. In this paper we describe the system and its performance, including a new, independent, out-of-loop verification of two-way optical time synchronization.