Experimental Investigation of a High-Accuracy Optical Delay Stabilization Method in Free Space

In recent years, a femtosecond synchronization system (optical delay stabilization system, ODSS) using a 3 GHz microwave signal for particle accelerator facilities has been developed at the University of Ljubljana (UL). To investigate its applicability for time-sensitive free-space applications, the stability of the system was tested over long measurement periods. Since the performance of the ODSS has already been evaluated in fiber-based scenarios, the main goal was to investigate and compare the stability of the synchronization system in both fiber-based and free-space channels, as well as to measure the impact of environmental effects during the synchronization in free space. This conference paper aims to summarize and elaborate on these measurement results.