The 7.5-Gb/s real-time end-to-end optical orthogonal frequency-division-multiplexing (OOFDM) transceivers incorporating variable power loading on each individual subcarrier are demonstrated experimentally using a live-optimized reflective semiconductor optical amplifier intensity modulator having a modulation bandwidth as narrow as 1 GHz. Real-time OOFDM signal transmission at 7.5 Gb/s over 25-km standard single-mode fiber is achieved across theC-band in simple intensity modulation and direct detection systems without in-line optical amplification and dispersion compensation.
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Giddings et al. (2010) studied this question.
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