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We propose a wavelength division multiplexing–carrier-less amplitude/phase modulation–passive optical network (WDM-CAP-PON) downstream with enhanced bandwidth efficiency using low-cost digital Hilbert single-sideband modulation. For each optical subcarrier, there are as many as four 10-Gb/s digital channels carried by a Nyquist subcarrier multiplexing scheme, which can be efficiently generated only...
8 times 11.5 Gbit/s (10 Gbit/s after coding) optical OFDM transmission over 1000 km standard single mode fibre (SSMF) with conventional distributed feedback (DFB) lasers and direct-detection is demonstrated. Compared with coherent-detection using external cavity lasers (ECL), DFB lasers and direct-detection can significantly reduce the system complexity and cost.
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