PROJECT TITLE :

Half-cycle modulation for VCSEL based 6-Gbaud 4-QAM transmission over 1 km multimode fibre link

ABSTRACT :

A subcarrier multiplexing system with the subcarrier frequency at half the baud rate to enhance the spectral efficiency is demonstrated. A 12 Gbit/s four-QAM signal in 9GHz bandwidth was successfully transmitted over a 1 km OM4 MMF 850 nm VCSEL without any equalisation method. The one.five dB power penalty was improved compared to an OOK signal at the same knowledge rate.


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