Chang Sun Hyok, Chung Hwan Seok, Fontaine Nicolas K, Ryf Roland, Park Kyung Jun, Kim Kwangjoon, Lee Jyung Chan, Lee Jong Hyun, Kim Byoung Yoon, Kim Young Kie
Opt Express. 2014 Jun 16;22(12):14229-36. doi: 10.1364/OE.22.014229.
Mode division multiplexed optical transmission enabled by all-fiber mode multiplexer is investigated. The proposed all-fiber mode multiplexer is composed of consecutive mode selective couplers. It multiplexes or demultiplexes LP01, LP11, LP21, and LP02 modes simultaneously. We demonstrate successful transmission of three spatial modes with 120 Gb/s PDM-QPSK signals over 15 km of four mode fiber by using 6x6 MIMO digital signal processing.