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Journals and Conferences
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.
Real-time optical OFDM transceivers are, for the first time, experimentally implemented, using standard commercially available components including FPGAs and DACs/ADCs. The transceivers support 1.5Gb/s transmission in directly modulated DFB laser-based 500m MMF IMDD systems.
Recent real-time optical OFDM (OOFDM) research progress is reviewed extensively in terms of adaptive transceiver design, intensity modulators, synchronisation techniques and network architectures. Results indicate that OOFDM is feasible for mass deployment in PONs.
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.