Characterization of Multi-Core Fiber Group Delay with Correlation OTDR and Modulation Phase Shift Methods

Using a Correlation-OTDR and a modulation phase shift method we characterized four multi-core fibers. The results show that the differential delay depends on the position of the core in the fiber and varies with temperature.Comment: This work has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 762055 (BlueSpace Project