Ultra-Low Crosstalk Fused Taper Type Fan-In/Fan-Out Devices for Multicore Fibers. - Lin Gan; Jiajun Zhou; Li Shen 010; Xiancong Guo; Yanlin Wang; Chen Yang; Weijun Tong; Li Xia; Songnian Fu; Ming Tang 005; Deming Liu (OFC, 2019)