Compared to the Intensity Modulation and Direct Detection(IM/DD)system,the coherent system with high-capacity and power budget can better satisfy the requirements of the high-capacity Passive Optical Network(PON).In recent years,applying coherent in PON to support high-bandwidth services in the future has become a hot research topic.For coherent PON,this article summarizes the research progress of key techniques in coherent PON from four aspects:system architecture,coherent simplification,uplink burst-mode detection,and flexible PON.In addition,it also presents laser-shared uplink and downlink Filter Bank Multi-Carrier(FBMC)-PON and Semiconductor Optical Amplifier(SOA)current-adjusted flexible PON schemes.
维普
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