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We have introduced a novel metro network architecture called Ultra-Dense Wavelength Switched Network (UD-WSN) [1], which enables an even fine spectrum granularity so as to efficiently accommodate low-speed metro services (e.g., 1GE/10GE services). We evaluate the performance of this type of networks with spectrum defragmentation and partial optical transport network (OTN) switching. An efficient spectrum...
We demonstrate a bidirectional 25-Gb/s optical fronthaul system with colorless WDM transceiver at RRU based on REAM-SOA. With dicode/NRZ coding for downstream/upstream and enhanced equalization technique, 20-km single-fiber bidirectional fronthaul network is achieved.
We propose a novel and low-cost SRS crosstalk management scheme in pilot tone based monitoring system. An experiment on 40-channel WDM system demonstrated the monitoring deterioration due to SRS crosstalk was greatly mitigated.
We propose an optical burst ring network featuring both sub-wavelength- and wavelength-granularity grooming. Thanks to optical-layer transparency at network nodes, a large number of transponders for optical-electrical-optical conversion are saved. The use of fixed-tuned transmitters and regular optical amplifiers leads the burst network compatible with present WDM networks and feasible for deployment,...
A novel scheme to overlay the DPSK broadcast signal onto the NRZ point-to-point signal in a WDM-PON is proposed. Selective broadcast is realized by adjusting the extinction ratio of the NRZ signals on individual wavelengths.
We propose a novel wavelength-division-multiplexed passive optical network (WDM-PON) architecture to provide a downstream multicast overlay on the conventional point-to-point data service. The differential-phase-shift-keying multicast data is modulated on the same optical downstream carrier with the inverse return-to-zero point-to-point data signal, thus additional light sources are saved. Broadcast...
We propose a novel wavelength modulated transmitter based on an optical phase modulator and demonstrate its application in a WDM-PON to facilitate upstream data re-modulation. The feasibility and performance of the system are experimentally investigated.
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