Low Loss Optical Connection Module for Seven-Core Multicore Fiber and Seven Single-Mode Fibers

A pair of compact optical connection modules that connect seven-core multicore fiber and seven single-mode fibers is developed. Insertion loss of <;0.6 dB, polarization-dependent loss of <;0.1 dB, and crosstalk of >;-50 dB are observed. The structure is applicable to the multicore fiber with more than seven cores.