Very-High-Throughput Coherent Ultradense WDM-PON Based on Nyquist-ISB Modulation


We tend to propose and experimentally demonstrate a very-high-throughput coherent ultradense wavelength division multiplexing passive optical network (UDWDM-PON) with its bandwidth efficiency enhanced using Nyquist-independent-sideband (N-ISB) modulation. The proposed optical line terminal (OLT) suggests 75 downlink optical subcarriers. For every optical subcarrier, there are as many as 16, 10-Gb/s N-ISB digital channels modulated on it, which will be efficiently generated using only one set of optical transmitter hardware. Experimental results show that the proposed UDWDM-PON is capable of accommodating 120zero 10G users at intervals an optical distribution network loss budget of 35.five dB, and achieve a complete throughput of twelve Tb/s and a spectral efficiency of 5.628-b/s/Hz. A lot of importantly, the proposed system with spectral- and bandwidth-economical N-ISB requires sixteen times less downlink optical transmitters at the OLT, which can be translated into savings in value, power consumption, and footprint. In addition, key techniques, like N-ISB modulation in a very PON system, frequency-locked optical multicarrier generation, and digital pre-equalization, are studied.

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