R.P. Giddings

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For the first time adaptive bit and/or power loading of real-time, end-to-end optical OFDM transceivers are experimentally demonstrated and compared. Low-complexity power loading only results in a penalty of ∼7% compared to high-complexity bit-power-loading.
Detailed numerical investigations of the transmission performance of adaptively modulated optical orthogonal frequency division multiplexed (AMOOFDM) signals are undertaken, for the first time, in optical amplification- and chromatic dispersion compensation-free SMF IMDD systems using semiconductor optical amplifiers (SOAs) as intensity modulators. A(More)
A simple, highly-effective, DSP-free, optical OFDM(OOFDM) synchronous clock recovery technique preserving system performance and enhancing stability is proposed and experimentally demonstrated, for the first time, in real-time end-to-end, 11.25Gb/s 64-QAM OOFDM, directly-modulated-DFB-based, 25km IMDD systems.
Real-time optical OFDM(OOFDM) transceivers with advanced channel estimation are experimentally demonstrated, which support 3Gb/s over 75km SMF transmission with negative power penalties of -2dB in directly-modulated-laser-based IMDD systems without in-line optical amplification and dispersion compensation.
Low-cost, narrow modulation bandwidth, un-cooled VCSELs can be utilized to directly modulate 64-QAM-encoded 11.25Gb/s signals for end-to-end real-time optical OFDM transmission over 25km SSMF IMDD systems with excellent performance robustness.
The first experimental demonstration of real-time 3Gb/s Optical OFDM(OOFDM) modems is reported, using off-the-shelf components and improved IFFT/FFT design. In directly modulated DFB laser-based, optical-amplifier- and dispersion-compensation-free, IMDD systems, 16QAM-encoded OOFDM transmission over 500m MMFs (75km MetroCor SMFs) is achieved with optical(More)
Three novel designs of adaptively modulated optical orthogonal frequency division multiplexed modems using subcarrier modulation (AMOOFDM-SCM) are proposed, each of which is based on a single IFFT/FFT operation and offers input/output reconfigurability.
Optimised operating conditions of SOA intensity modulators enable the colourless adaptively modulated optical OFDM (AMOOFDM) transmitters, which support ≫30Gb/s AMOOFDM signal transmission over 60km IMDD SMFs without optical amplification and chromatic dispersion compensation.
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