A 10 Gbit/s OFDM upstream transmission has been investigated by using a Fabry-Pérot laser diode (FP-LD) based ONU with seeding-light in a colourless WDM-PON. Also demonstrated is the relationship of CW injection power and SNR of each OFDM subcarrier for a modelocked FP-LD. Moreover, when a 16-QAM OFDM modulation is applied in a modelocked FP-LD, −15.7 dBm received sensitivity at the BER of 3.8×10−3 can be obtained after 20 km fibre transmission.
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Yeh et al. (2012) studied this question.
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