Multi-gigabit transmission over 1 mm core diameter graded index POF

One of the main objectives of the EU POF-PLUS project is the optimization of available components and techniques to achieve multi-gigabit transmission over 1 mm core diameter plastic optical fiber. Hence the work in this section, demonstrates transmission rates between 5.3 and 7.6 Gbit/s achieved for fiber lengths between 10 and 50 m using discrete multitone modulation (DMT) in an intensity-modulated direct-detection system using directly modulated eyesafe VCSEL and silicon photodiode (PD). The used system bandwidth is only 1.42 GHz corresponding to a spectral efficiency of >3.7 bits/s/Hz.