Propagation Mode Retention at Fiber Bending Region Using Strongly Coupled Multi-Core Fiber

摘要

Strongly coupled MCF is studied in propagation mode retention capability as regular multi-mode fiber has an issue of mode crosstalk in the fiber that prevents proper preservation of individual mode transmission. One main cause of this crosstalk has been mode excitation phenomenon at the bending region of the fiber. We simulated and estimated the transmittance of input mode by using BPM simulation and verified them experimentally. As a result, mode retention characteristics of 5 dB at 80 mm bending radius, has been successfully confirmed.