Single-Wavelength Symmetric 50 Gbit/s Equalization-Free NRZ IM/DD PON with up to 33 dB Loss Budget and Fiber Transmission over >40 km

We demonstrate burst-mode upstream and continuous-mode downstream transmission in a 50G TDM-PON system, achieving up to 33-dB loss budget with a maximum of 77-km SMF transmission before any equalization. The system is enabled by semiconductor optical amplifiers at the transceivers.