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In this work, we investigate a hybrid OFDM-baseband (BB) signal and three-band OFDM wireless channels using the 2.5 GHz bandwidth directly modulated laser (DML) and 10 GHz bandwidth electro-absorption modulated laser (EML) in a passive optical network (PON) respectively. Here, each 16-QAM OFDM wireless and 64-QAM OFDM-BB signals can achieve 11.2 Gb/s and 15 Gb/s traffic data rates respectively in...
Here, we first propose to adjust adaptively the output optical power of the upstream laser diode (LD) depending on the different fiber lengths. With the different fiber transmission lengths, we can properly adjust the bias current and modulation index of upstream LD for energy-saving. We characterize and analyze experimentally the relationship of output optical power and modulation amplitude Vamp...
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