What is a mode in few mode fibers?: Proposal of MIMO-free mode division multiplexing using true eigenmodes. - Yasuo Kokubun; Tatsuhiko Watanabe; Seiya Miura; Ryo Kawata (IEICE Electron. Express, 2016)

Full-set high-speed mode analysis in few-mode fibers by polarization-split segmented coherent detection method: Proposal and simulation of calculation error. - Ryo Kawata; Tatsuhiko Watanabe; Yasuo Kokubun (IEICE Electron. Express, 2018)