Robust real-time 15125Gb/s adaptive optical OFDM transmissions over 100m OM2 MMFs utilizing directly modulated VCSELs subject to optical injection locking - Zhang, H. B.; Yi, X. W.; Zhang, Q. W.; Ling, Y.; Deng, M. L.; Hugues-Salas, E.; Giddings, R. P.; Hong, Y.; Wang, M.; Tang, J. M. (Optics express, 2014)