Low-Loss Low-MDL Core Multiplexer for 3-Core Coupled-Core Multi-Core Fiber

A fiber-based core multiplexer is designed, fabricated, and evaluated. Insertion losses vary between 0.74 dB and 0.91 dB. Digital holography reveals mode-dependent loss fluctuates between 0.3 dB and 0.9 dB across C- and L-band.

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