Dense SDM (12-core × 3-mode) transmission over 527 km with 33.2-ns mode-dispersion employing low-complexity parallel MIMO frequency-domain equalization. - Kohki Shibahara; Takayuki Mizuno; Hidehiko Takara; Akihide Sano; H. Kawakami; D. Lee; Yutaka Miyamoto; Hirotaka Ono 002; Manabu Oguma; Yoshiteru Abe; Takayuki Kobayashi; Takashi Matsui; et al. (OFC, 2015)