The non-tilting lensed-MMF/SMF coupling of tri-mode VCSEL with D factor of 14 GHz/mA0.5 is demonstrated to provide root-mean-square linewidth of 0.66/0.54 nm and mode-partition-noise of -145/-140 dBc/Hz for error-free 62-/58-Gbit/s NRZ-OOK and 164-/140-Gbit/ s 16-QAM-OFDM transmission.
