Low-loss physical-contact-type fan-out device for 12-core multicore fiber

We propose a low-loss fan-out for 12-core multicore fiber, which achieves physical-contact connection between coupled cores by accurately arranging fibers and optimizing the conditions for physical contact, and demonstrate a physical contact connection with a low average insertion loss of 0.64 dB and a high return loss of over 55 dB for 12 cores.