Mode-selective dissimilar fiber photonic-lantern spatial multiplexers for few-mode fiber

We demonstrate a 3 core fiber-based photonic lantern spatial-multiplexer that selectively excites the LP
₀₁
and LP
₁₁
modes. The mode-selectivity is greater than 6 dB and insertion loss is below 2.4 dB when coupled to a graded-index FMF.