Demonstration of Bidirectional Real-Time 100 Gb/s (4×25 Gb/s) Coherent UDWDM-PON with Power Budget of 44 dB

We experimentally demonstrate the real-time of 4×25-Gb/s coherent UDWDM-PON at 12.5-GHz spacing over 50-km standard single mode optical fiber. The downlink power budget can be more than 44 dB, and support more than 1000 subscribers.