Innovative Fusion of Multimode Fiber and Multicore Fiber for High-precision Non-contact Displacement Measurement

We demonstrated a non-contact displacement measurement system based on multimode fiber (MMF) and multicore fiber (MCF). The proposed MMF-MCF structure converts the displacement into variations in pulse intensity and break the speed limitations of conventional camera-based methods. The mean absolute error (MAE) for displacement estimation is 2.3 µm, with the estimation range of 300 µm.