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A new ultra-dense WDM-PON with coherent techniques and low cost devices is developed for an efficient utilization of the optical spectrum, showing that the “Wavelength-to-the-User” concept can be feasible with 6.25 GHz channel spacing in a splitter-based PON.
A high-level optical access network based on coherent technology supporting ultra-dense Wavelength Division Multiplexing (WDM) is developed in the EU FP7 COCONUT project (COst-effective COherent ultra-dense-WDM-PON for lambda-To-the-user access networks). The COCONUT network should allow for seamless evolution from present PON architectures, and also support new emerging applications such as mobile...
Quantized-Feedback Equalization at the digital decision of the OLT-RX allows recovering the low frequency components after filtering out the associated corrupting Rayleigh back-scattering noise added in the bidirectional WDM-PON transmission, obtaining a substantial tolerance increase.
A PSK homodyne optical receiver is experimentally demonstrated based on time-diversity switching, without optical hybrid. It achieves high tolerance to phase noise and feasible implementation with off-the-shelf electrical and optical components.
A novel phase shift keying (PSK) receiver technique is proposed based on fuzzy logic digital signal processing and electronic-driven diversity. It achieves high tolerance to phase noise and feasible implementation with off-the-shelf electronic and optical components.
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