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An optical OFDM system with constellation fine adjustment scheme is proposed and experimentally demonstrated. The complexity of the scheme is analyzed and proved to be acceptable. The single-mode fiber transmission distance of a 56Gb/s O-OFDM system is successfully extended by 350-km at the FEC limit with less reference symbols added.
Parallel-to-cascading optical code (OC) label processing based on fiber Bragg grating is proposed and experimentally demonstrated. With this technique, the length of the multibit OC label is the same as that of the one-bit OC label; only one encoder and one decoder are needed for the multibit OC label's generation and recognition; the relatively low-speed recognition patterns also reduce the complexity...
An all-optical orthogonal frequency division multiplexing scheme with 200 GSample/s optical sampling technique is proposed and experimentally demonstrated. 50 Gb/s AO-OFDM data is successfully transmitted over a 20 km umcompensated single-mode-fiber link with real-time direct-detection.
Stacked optical code (OC) label and its multi-sampled encoder implemented by fiber Bragg gratings are proposed. The experiment results show that this technique is practical for optical multicasting and a 16-node multicast group can be well supported.
Cascaded optical code label and its en/decoder based on fiber Bragg grating are proposed and experimentally demonstrated. Then all-optical routing can be realized in OPS networks without label erasing, label reinsertion or table lookup operation.
A novel optical carrier-reuse scheme in passive optical network is proposed and demonstrated. Over 20 km single mode fiber bidirectional transmission experiment is carried out with bit rate of 2.5 Gb/s.
A new buffer structure with output-aware buffering and variable delay buffer is proposed. This structure can realize optical RAM buffering in OPS contention resolution, so that it can significantly improve the performance of OPS networks.
A dynamic chromatic dispersion compensation system is implemented with a dispersion monitoring module based on frequency shift of semiconductor optical amplifier (SOA). Experimental result shows that its compensation range isplusmn100 ps/nm, accuracy is less thanplusmn5 ps/nm.
This paper proposes a TCP control scheme with fixed RTT in OPS networks. Simulation results indicate that this scheme can significantly reduce the core router's buffer size and efficiently enhance the network throughput.
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