6×28-Gbaud few-mode recirculating loop transmission with gain-equalized inline few-mode fiber amplifier. - Ezra Ip; Ming-Jun Li 001; Kevin Bennett; Scott R. Bickham; Yue-Kai Huang; Akihiro Tanaka; Eduardo Mateo 001; Junqiang Hu; Ting Wang 016; Andrey Korolev; Konstantin Koreshkov; William Wood; et al. (OFC/NFOEC, 2013)