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We present 56 Gbps unequalized 8-pulse-amplitude-modulation (PAM) real-time transmission over 50 m of multimode fiber and 70 Gbps 4-PAM operation with offline equalization. FEC would be necessary in both schemes. The bit-rates are given taking into account the FEC overhead needed to reach a BER below $10^{-12}$. The experiments were performed with an 850 nm vertical cavity surface emitting laser...
We present 56 Gbps unequalized 8-PAM real-time transmission over 50 m of MMF and 70 Gbps 4-PAM operation with offline equalization. The experiments were performed with an 850 nm VCSEL with 25 GHz bandwidth and a 22 GHz photoreceiver.
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