48.7-Gb/s 4-PAM Transmission Over 200 m of High Bandwidth MMF Using an 850-nm VCSEL

We demonstrate 4-PAM 48.67-Gb/s transmission, using a directly modulated VCSEL, over 50, 100, and 200 m of multimode fiber with partial dispersion compensation properties. The results of our experiments indicate that 200 m reach is achievable with forward error correcting codes with small overhead.